Galactic outflows of cool (~104 K) gas are ubiquitous in local starburst galaxies and in most high-redshift galaxies. Hot gas from supernovae has long been suspected as the primary driver, but this mechanism suffers from its tendency to destroy the cool gas. We propose a modification of the supernova scenario that overcomes this difficulty. Star formation is observed to take ...

The goal of this program was a comprehensive multiwavelength study of absorption phenomena in active

Recent detailed studies of narrow absorption line (NAL) systems in QSO spectra have revealed that at least 50% of QSOs have NALs associated with the central engine, and in most cases they are found to be outflowing. Will studies of NALs provide the much sought-after evidence for ubiquitous QSO feedback that can halt the formation of stars in galaxies? I present new results on ...

in the IRAC observations of the HH 46/47 outflow, a collimated bipolar outflow emanating from a low 46/47 outflow using a decon- volution algorithm and found a wide-angle biconical component. The second is the coupled multi- band completeness to infrared excess sources, which is approx- imately given

During February 2001 the CLUSTER satellites recorded a number of perigee passes through the midnight auroral zone. We concentrate on one pass, on 23 February 2001, when structured outflow was observed. Simultaneous observations of the aurora were available from the FUV instrument on IMAGE. The features in the ion outflow observed by ...

... on CO absorbed on Pt and alloy clusters. ... DENSITY FUNCTIONAL THEORY, CLUSTERING, PLATINUM, ADSORBATES, PLATINUM ALLOYS. ...

In uveoscleral outflow, aqueous humor leaves the anterior chamber and passes caudally through the trabecular meshwork and the sclerociliary cleft to enter the supraciliary and suprachoroidal spaces. The fluid is then absorbed by choroidal and scleral circulations. Using /sup 3/H-labeled dextran, uveoscleral outflow was quantitated in ...

These include, but are not limited to: stellar winds and outflows, post-main- sequence stellar evolution, binary/multiple star evolution, globular cluster ...

These include, but are not limited to: stellar winds and outflows, post-main- sequence stellar evolution, binary/multiple star evolution, globular cluster structure ...

We present a study on the impact of molecular outflows in the Perseus molecular cloud complex using the COMPLETE Survey large-scale {sup 12}CO(1-0) and {sup 13}CO(1-0) maps. We used three-dimensional isosurface models generated in right ascension-declination-velocity space to visualize the maps. This rendering of the molecular line data allowed for a rapid and efficient way to ...

We present results from a long observation using the integral field spectrograph ARGUS of the ultraluminous IRAS source IRAS 09104+4109, which is associated with the central galaxy of a rich cluster at a redshift z=0.44. We map the distribution, kinematics and ionization state of its extended emission-line region, and show that both the nucleus and a secondary peak of line ...

We present a spectral analysis of the X-ray Chandraof the Seyfert 1 Galaxy NGC 5548. The warm absorber present in this object was modeled with the code PHASE. We detected two different outflow velocity systems in this source. One of the absorbing systems has outflow velocity of -1091+/-63 km s(-1) and the other of ...

The infrared absorption and Raman spectra were calculated by the molecular dynamics method for water clusters with chlorine ions in a medium of water and ozone or oxygen molecules. The intensity of IR absorption spectra of clusters with absorbed oxygen increased and that of clusters with ...

We present the results of CO (J = 3 - 2) and CO (J = 1 - 0) mapping observations toward the active cluster-forming clump, L1688, in the ? Ophiuchi molecular cloud. From the CO (J = 3 - 2) and CO (J = 1 - 0) data cubes, we identify five outflows, whose driving sources are VLA 1623, EL 32, LFAM 26, EL 29, and IRS 44. Among the identified ...

AGN outflows impact the evolution of supermassive black holes, host galaxies, surrounding IGM, and cooling flows. However, the physical properties of these winds are poorly known. We propose to obtain the deepest RGS spectrum of any AGN, allowing us to determine the physical conditions of the gas. Through monitoring of the warm absorber using the combined ...

The cluster size oscillations of the chemisorption energies are strongly effected by the geometry optimization of the clusters. This is found to be true for the case of CO absorbed on copper clusters of which this paper investigated using a correlated quantum chemical model approach.

An important source of magnetospheric plasma is outflow from the terrestrial ionosphere. Low energy ions travel along the magnetic field lines and enter the magnetospheric lobes and are convected towards the tail plasma sheet. Results from Cluster indicate that the field aligned outflow velocity is sometimes much higher than the ...

We consider the physical properties of matter outflow from active galactic nuclei in a unification model. The unification model of the outflow assumes that the source of the absorbing matter is the internal surface of the obscuring torus, and the model includes two-phase gas dynamics, radiation transfer and absorption spectrum ...

We have made progress in the areas related to the propulsion and confinement of gas responsible for broad absorption troughts in QSOs: Radiative Acceleration in BALQSOs; The 'Ghost' of Lyman (alpha); and Magnetic Confinement of Absorbing Gas.

We report on an observation of the broad absorption line (BAL) quasar PG 1115+080 performed with the XMM-Newton observatory. Spectral analysis reveals the second case of a relativistic X-ray-absorbing outflow in a BAL quasar. The first case was revealed i...

Blueshifted absorption lines in the UV and X-ray spectra of active galaxies reveal the presence of massive outflows of ionized gas from their nuclei. The intrinsic UV and X-ray absorbers show large global covering factors of the central continuum source, ...

Aims: We have searched for star formation activity (mainly infall and outflow signatures) in a sample of high-mass molecular clumps (M > 100 M&sun;) in different evolutionary stages and with a wide range of surface densities, with the aim of looking for evolutionary trends and testing observationally recent theoretical models which predict the need for a minimum surface ...

The detection of OH absorption at high velocities in the bipolar outflow associated with the star formation region L1551 is reported. The OH absorption shows the same anisotropic angular distribution as the redshifted and blueshifted CO emission. The OH transitions are markedly subthermal (Tex not greater than 3.8 K), since the radiation that is being ...

We present results from multi-epoch spectral analysis of XMM-Newton and Chandra observations of the broad absorption line (BAL) quasar APM 08279+5255. Our analysis shows significant X-ray BALs in all epochs with rest-frame energies lying in the range of ~6.7-18 keV. The X-ray BALs and 0.2-10 keV continuum show significant variability on timescales as short as 3.3 days (proper time) implying a ...

Energetic outflows associated with young stellar objects exert a strong effect on their parent molecular clouds. The dynamics of this interaction is yet to be well understood. In particular the role of jets and outflows in powering cloud turbulence, modifying the star formation efficiency (SFE) and/or disrupting the parent clouds remains unclear. Spitzer ...

We present wavelength measurements of K-shell resonance lines of O V and O VI, using the University of California Lawrence Livermore National Laboratory EBIT-I electron beam ion trap. The wavelength accuracy of better than 140 ppm is sufficient to determine gas outflow velocities of warm absorbers associated with AGNs to within 40 km/s and better. Our ...

Motivated by the detection of a relativistic outflow of highly ionized gas in a previous XMM-Newton observation of the lensed quasar APM08279+5255, we propose four 90ks observations of this object to improve our understanding of the significance of such outflows in regulating black hole growth and in influencing structure formation. The large lensing ...

We present the results of CO (J = 3-2) and HCO+ (J = 4-3) mapping observations toward a nearby embedded cluster, Serpens South, using the ASTE 10 m telescope. Our CO (J = 3-2) map reveals that many outflows are crowded in the dense cluster-forming clump that can be recognized as an HCO+ clump with a size of ~0.2 pc and mass of ~80 M ...

find that long filaments can only form if the outflowing wind velocity is sufficiently large, 108 cm s, from an outflowing wind, in the formation of these filaments is probably significant. As a result, tail of the H filaments has been attributed to a variety of processes including: condensation from

We here investigate the possibility that the observed collimated outflows in luminous infrared galaxies (LIGs) and some Seyfert galaxies can be produced in a starburst (SB) environment. A nuclear disk can be quickly produced by gas infall during star formation in a rotating, stellar cluster. We find that massive nuclear SBs with core disk masses M_d \\sim ...

The mass reinserted by young stars in an emerging massive compact cluster shows a bimodal hydrodynamic behaviour. In the inner parts of the cluster, it is thermally unstable, while in its outer parts it forms an outflowing wind. The chemical homogeneity/inhomogeneity of low/high-mass clusters demonstrates the ...

Island convergence zone, the Indian River convergence zone, interlake convergence, storm outflow ..... misidentify cluster of cells or cells that are rapidly intensifying. .... archived by the AMU at NWS MLB for case study analyses. ...

We present a new theoretical framework for modeling the cluster growing process. Starting from the initial tetrahedral cluster configuration, adding new atoms to the system, and absorbing its energy at each step, we find cluster growing paths up to the cluster sizes of more than 100atoms. We ...

Galaxy groups are increasingly recognized as a key environment for transforming galaxy morphologies and star formation rates. Current research is focused on illuminating specific physical processes responsible for galaxy evolution in these systems. Super-Group 1120-12 consists of four virialized groups at z 0.36 that will merge and form a cluster comparable in mass to Coma by ...

A mathematic model for evaluation of absorbed dose in radionuclide renography has been developed and programmed for automatic calculation in the computer. Input data to the model are readily available from the results of the renography and, hence, the method described is suitable for individual dose determinations in adults. Apart from the situation with very considerable ...

A mathematic model for evaluation of absorbed dose in radionuclide renography has been developed and programmed for automatic calculation in the computer. Input data to the model are readily available from the results of the renography and, hence, the method described is suitable for individual dose determinations in adults. Apart from the situation with very considerable ...

Energetic outflows are an ubiquitous phenomena associated with young stellar objects and are believed to exert a strong effect on their parent molecular clouds. In most young clusters the density of newly forming stars implies that parsec scale outflows may sweep over a significant fraction of the cluster volume ...

We present new results from our study of the X-rayed outflow of the z = 3.91 gravitationally lensed broad absorption line quasar APM 08279+5255. These results are based on spectral fits to all the long exposure observations of APM 08279+5255 using a new quasar-outflow model. This model is based on CLOUDY 3 CLOUDY is a photoionization code designed to ...

We propose to survey the entire 2.5��2.5� of Carina OB1, the premier massive star forming region in the southern sky, for globules, clusters, jets, and young stars with near-IR images from NEWFIRM. Deep JHK images will provide a census of the protostellar disks and clusters in the area, while the H_2 images reveal jets and ...

Satellite observations over the past few decades, notably those from ISIS, S3-3, Dynamics Explorer-1 and -2, Viking, Akebono, Freja, Polar, Fast, and Cluster, have demonstrated that ions of ionospheric origin represent a significant and at times dominant component of the magnetospheric plasma. In this overview, we will focus on our existing observations of ion ...

We present new near-IR H2, CO J = 2-1, and CO J = 3-2 observations to study outflows in the massive star-forming region IRAS 05358+3543. The Canada-France-Hawaii Telescope H2 images and James Clerk Maxwell Telescope CO data cubes of the IRAS 05358 region reveal several new outflows, most of which emerge from the dense cluster of ...

We present new near-IR H{sub 2}, CO J = 2-1, and CO J = 3-2 observations to study outflows in the massive star-forming region IRAS 05358+3543. The Canada-France-Hawaii Telescope H{sub 2} images and James Clerk Maxwell Telescope CO data cubes of the IRAS 05358 region reveal several new outflows, most of which emerge from the dense ...

Spitzer has shown that radiation can produce inverse square law attractive forces between absorbing interstellar grains. Whipple and Savedoff examined whether these forces could cause dust to flow through ambient gas and form dense clouds from which stars would form. Savedoff concluded that appreciable concentration of dust was not to be expected and that radiative ...

Star formation driven outflows are a critically important phenomenon in theoretical treatments of galaxy evolution, despite the limited ability of observational studies to trace galactic winds across cosmological time-scales. It has been suggested that the strongest Mg II absorption-line systems detected in the spectra of background quasars might arise in ...

We investigate the dynamical nature of protostellar outflows and their role in the evolution of a forming star cluster. We find that magnetic fields collimate protostellar winds into a common angular force distribution at distances sufficiently far from their source. Thin shells of gas swept into motion by these winds show features typically observed in ...

The Perseus Cluster (A426) is the brightest cluster of galaxies observed in X-rays in the sky and its giant central galaxy (NGC1275) hosts the extended double radio source 3C84. There is a spectacular H-alpha nebulosity surrounding NGC1275 with loops and filaments that are probably magnetized and extend over 100 kpc. The continuous blowing of bubbles ...

We present a model and numerical simulations for the propagation of intense short laser pulses in gases of atomic clusters. As the pulse propagates through the clusters, they absorb energy, expand and explode. The clustered gas thus acts as a medium with time dependent effective dielectric constant. A ...

Models have shown that quasars are a crucial ingredient in the evolution of massive galaxies. Outflows play a key role in the story of quasars and their host galaxies, by helping regulate the accretion process, the star-formation rate and mass of the host galaxy (i.e., feedback). The prescription for modeling outflows as a contributor to feedback requires ...

We report the emergence of a high-velocity, broad absorption line outflow in the luminous quasar Ton 34, at zq = 1.928. The outflow is detected through an ultraviolet C IV broad absorption line, in a spectrum obtained in 2006 January by the Sloan Digital Sky Survey. No absorption trough was present in two different spectra acquired in 1981 at Las Campanas ...

Approximately 13% of quasars show broad blue-shifted absorption features in their spectra indicative of high velocity outflows. However, the driving mechanism responsible for these outflows remains uncertain. Here we present the results of our search for the ghost of Lyman- ?, a line-locking feature seen in approximately 1-2% of broad absorption line ...

The formation of intermediate/high-mass stars is currently a matter of vigorous debate. On one hand, many authors suggest the possibility that massive stars form as a scaled-up version of low-mass stars, thus driving collimated outflows and being associated with rotating accretion disks. On the other hand, the fact that massive stars are found associated with ...

The radioactivity induced in PWR cluster control rods during reactor operation has been calculated using the computer programme ORIGEN. Neutron fluxes and spectrum conditions as well as the strongly shielded cross sections for the absorber materials Ag, I...

Carbon nanotubes (CNTs) can exist as clusters whenever doping amount in nematic liquid crystal (LC) mixture exceeds critical point. Based on experimental observation of electric field-dependent shape of the CNT cluster, it elongates along the field direction and its original morphology of the cluster is restored after the removal of ...

The fine structure of the region of formation of a protostar in the dense molecular cloud OMC-1 of the Orion Nebula was studied during a period of enhanced activity in 1998-1999, with an angular resolution of 50 �as and a velocity resolution of ? v = 0.053 km/s. Inclusions of ice granules in the bipolar outflow were detected and identified. The velocity of the ...

2006. Guest Resercher, Laboratoire de Physique et Chimie de l'Environnement, CNRS, Orl�eans, France gyrofrequency in high-altitude cusp: Novel results from Cluster multi-spacecraft observa- tions, EGU 2004, The ion outflow from the cleft/cusp: Cluster results, London November MIST, 28th November 2003. --2002

In the primordial universe, low-mass structures with virial temperatures less than 104 K were unable to cool by atomic line transitions, leading to a strong suppression of star formation. On the other hand, these "minihalos" were highly prone to triggered star formation by interactions from nearby galaxy outflows. In Gray & Scannapieco, we explored the impact of ...

We use high-resolution three-dimensional adaptive mesh refinement simulations to investigate the interaction of high-redshift galaxy outflows with low-mass virialized clouds of primordial composition. While atomic cooling allows star formation in objects with virial temperatures above 10{sup 4} K, 'minihalos' below this threshold are generally unable to form ...

We present an analysis of the spatial distribution of metal-rich gas in 10 galaxy clusters using deep observations from the Chandra X-ray Observatory. The brightest cluster galaxies (BCGs) have experienced recent active galactic nucleus activity in the forms of bright radio emission, cavities, and shock fronts embedded in the hot atmospheres. The heavy ...

A model for the interaction of an intense laser with atomic clusters is presented. The model takes into account the spatial nonuniformities of the cluster as it evolves in time. The cluster is treated as a stratified sphere having an arbitrary number of layers. Electric and magnetic fields are obtained by solving the vector Helmholtz ...

The total feedback energy injected into hot gas in galaxy clusters by central black holes can be estimated by comparing the potential energy of observed cluster gas profiles with the potential energy of non-radiating, feedback-free hot gas atmospheres resulting from gravitational collapse in clusters of the same total mass. Feedback ...

We present Subaru observations of the newly discovered luminous quasar AKARI J1757+5907, which shows an absorption outflow in its spectrum. The absorption consists of 9 distinct troughs, and our analysis focuses on the troughs at �-1000 km s-1 for which we could measure accurate column densities of He I*, Fe II, and Mg II. We used photoionization models to constrain the ...

Water vapour masers and CO outflows are well known to be associated with the youngest phases of evolution of massive stellar objects. Nevertheless, up to now there is a lack of high resolution multiwavelength study of the regions containing these objects. Using the VLA, the CSO and the TIRGO equipped with the new Near-Infrared (NIR) camera ARNICA, we have begun a systematic ...

I present a study of diffuse interstellar bands (DIBs) in seven moderate redshift HI-selected damped Lya galaxies and 18 low to moderate redshift NaI- selected starbursts. I have developed a spectral analysis method for finding and calculating limits for the weak DIB absorption profiles. The spectral analysis is optimized for both resolved and unresolved features and also assesses the accuracy of ...

Protostellar outflows can inject sufficient mass, momentum, and kinetic energy into their parent star-forming clumps to dramatically alter their structure, generate turbulence, and even to disrupt them. Outflows represent the lowest rung on a `feedback ladder' consisting of increasingly powerful mechanisms which kick-in if star formation escalates towards ...

The youngest super star clusters (SSCs) in the merging Antennae Galaxies (NGC 4038/39) drive supersonic mass-loaded outflows from the HII regions in which they are embedded. High-resolution K-band NIRSPEC spectroscopy reveals broad spatially extended Br-gamma emission in 16 targets. The radial velocity field of young clusters ...

Classical nucleation theory (CNT) has been used in models of dust nucleation in circumstellar outflows around oxygen-rich asymptotic giant branch stars. One objection to the application of CNT to astrophysical systems of this sort is that an equilibrium distribution of clusters (assumed by CNT) is unlikely to exist in such conditions due to a low collision ...

We investigate massive star formation in turbulent, magnetized, parsec-scale clumps of molecular clouds including protostellar outflow feedback using three dimensional numerical simulations of effective resolution 2048{sup 3}. The calculations are carried out using a block structured adaptive mesh refinement code that solves the ideal MHD equations including self-gravity and ...

Context. Direct observations of accretion disks around high-mass young stellar objects would help to discriminate between different models of formation of massive stars. However, given the complexity of massive star forming regions, such studies are still limited in number. Additionally, there is still no general consensus on the molecular tracers to be used for such investigations. Aims: Because ...

We present a detailed analysis of the Chandra High Energy Transmission Grating Spectrometer (HETGS) and XMM-Newton high-resolution spectra of the bright Seyfert 1 galaxy, Mrk 290. The Chandra HETGS spectra reveal complex absorption features that can be best described by a combination of three ionized absorbers. The outflow velocities of these warm ...

Jets and winds are significant channels for energy loss from accreting black holes. These outflows mechanically heat their surroundings, through shocks as well as gentler forms of heating. We discuss recent efforts to understand the nature and distribution of mechanical heating by central active galactic nuclei (AGN) in clusters of galaxies, using ...

We report the first discovery of the emergence of a high-velocity broad-line outflow in a luminous quasar, J105400.40+034801.2, at redshift z ~ 2.1. The outflow is evident in ultraviolet CIV and SiIV absorption lines with velocity shifts v ~ 26300 km s-1 and deblended widths FWHM ~4000 km s-1. These features are marginally strong and broad enough to be ...

We report the first discovery of the emergence of a high-velocity broad-line outflow in a luminous quasar, J105400.40+034801.2 at redshift z 2.1. The outflow is evident in ultraviolet CIV and SiIV absorption lines with velocity shifts v 26,300 km/s and deblended widths FWHM 4000 km/s. These features are marginally strong and broad enough to be ...

A theoretical model framework of spherical symmetry is presented for a composite astrophysical system of two polytropic fluids coupled together by gravity to explore large-scale shocks and flow dynamics in clusters of galaxies or in globular clusters. The existence of such large-scale shocks in clusters of galaxies as inferred by ...

Context: .The molecular and continuum surveys at NIR and (sub-)mmwavelengths recently performed in the large and distant (?1 kpc) Bok globules CB3 and CB34 are the framework of the present paper. With this multi-wavelength approach, it is possible to trace the hot jets and cold outflows driven by the (proto-)stars, to investigate how they interact with the surrounding medium, ...

Spectral differences between lensed quasar image components are common. Since lensing is intrinsically achromatic, these differences are typically explained as the effect of either microlensing, or as light path time delays sampling intrinsic quasar spectral variability. Here we advance a novel third hypothesis: some spectral differences are due to small line-of-sight differences through quasar ...

A facility developed to measure the acoustic properties of sound-absorbing materials for the intake and outflow ducts of compressors under the acoustic and aerodynamic conditions in which they would be employed is presented. The device consists of a cylindrical duct with a continuous flow of cold air on which are arranged a set of acoustic sources which ...

The Virgo Cluster spiral galaxy NGC 4569 is moving with a relative radial velocity of 1250 km/s through the intregalactic cluster medium towards us. It has been observed by us in X-rays and in the optical (R B H?). From the X-rays a central bipolar outflow can be suggested. The absorption of the softest X-radiation allows to derive the ...

Accretion disk outflows are an important part of the quasar phenomenon. We report on a high-velocity narrow absorption line (NAL) outflow in the redshift z 2.3 quasar J2123-0050. This outflow is remarkable for having speeds and ionization typical of broad absorption line (BAL) flows, but with line widths of order 100 times narrower ...

We present an investigation into the absorber in front of the z = 2.63 radio galaxy MRC 2025-218, using integral field spectroscopy obtained at the Very Large Telescope, and long-slit spectroscopy obtained at the Keck II telescope. The properties of MRC 2025-218 are particularly conducive to study the nature of the absorbing gas, i.e. this galaxy shows ...

The total mechanical feedback energy received by clusters of mass 4-11 � 10^{14} M_{sun} exceeds 10^{63} ergs and mean feedback luminosity 10^{46} erg/s. This can be estimated by comparing gas density profiles in idealized adiabatic clusters evolved to zero redshift with entropy and gas fraction profiles in clusters of the same ...

We present arcsecond resolution mid-infrared and millimeter observations of the center of the young stellar cluster AFGL961 in the Rosette molecular cloud. Within 0.2 pc of each other, we find an early B star embedded in a dense core, a neighboring star of similar luminosity with no millimeter counterpart, a protostar that has cleared out a cavity in the circumcluster ...

Broad absorption line (BAL) quasars exhibit broad line aborption in their ultraviolet spectra at outflow velocities up to or even exceeding 0.1c. We compare recently-obtained quasar spectra to those in the Large Bright Quasar Survey (LBQS) to study the variation of BAL quasars over system-frame time scales up to about 10 years. Absorption features in the approximately 20 BAL ...

Previous surveys of outflows in low-redshift active galactic nuclei (AGNs) have relied on the analysis of sources selected primarily for their optical/X-ray brightness and are therefore biased. Toward determining the outflow properties of local AGNs, we detect warm absorption signatures of O VII and O VIII absorption edges in the available ...

Previous surveys of outflows in low-redshift active galactic nuclei (AGNs) have relied on the analysis of sources selected primarily for their optical/X-ray brightness and are therefore biased. Toward determining the outflow properties of local AGNs, we detect warm absorption signatures of O VII and O VIII absorption edges in the available ...

The formation processes of high-mass stars are not well understood, and the basic question can be phrased as: Do massive stars form similarly to low-mass stars, but with enhanced accretion rates, or are different processes taking place, e.g., the coalescence and merging of intermediate-mass protostars in the very center of star-forming clusters? This thesis investigates the ...

Higher outflow channel dissection in the martian region of southern circum-Chryse appears to have extended from the Late Hesperian to the Middle Amazonian Epoch. These outflow channels were excavated within the upper 1 km of the cryolithosphere, where no liquid water is expected to have existed during these geologic epochs. In accordance with previous ...

The use of drainage systems in glaucoma treatment progressively increase, mainly in case of failure of medical treatment and/or laser and/or trabeculectomy. They aimed to improve aqueous humor drainage through the trabecular meshwork. New drainage concepts are regularly proposed, either with biomaterial implants, inert or non absorbent, or with approaches to bypass trabecular ...

We study the Schl�gl model in a vesicle with semi-permeable membrane. The diffusion constant takes a smaller value in the membrane region, which prevents the outflow of self-catalytic product. A nonequilibrium state is stably maintained inside of the vesicle. Nutrients are absorbed and waste materials are exhausted through the membrane by diffusion. It ...

A boundary condition that absorbs incident stress waves with very little reflection has been implemented in the two-dimensional Eulerian wavecode CSQII. This boundary condition allows inflow or outflow of material, includes the influence of gravity, works with nonlinear materials and includes the influence of stress deviators. This boundary condition can ...

The importance of nonuniform extinction in open star clusters of intermediate age is studied on the basis of photoelectric UBV measurements in open clusters catalogued by Mermilliod (1975) and of Wallenquist's study (1975) of the presence of absorbing matter by star counts in the fields of open clusters. It is ...

MMT observations of AC 211, the optical counterpart of the high-luminosity X-ray source in globular cluster M15, are presented. The observation of Naylor et al. (1988) that the He I absorption is blueshifted by more than 100 km/s with respect to the mean velocity of the cluster is confirmed. It is shown that if the absorption occurs in a stream of gas ...

The youngest super star clusters (SSCs) in the merging Antennae Galaxies (NGC 4038/39) drive supersonic mass-loaded outflows from the HII regions in which they are embedded. High-resolution Keck/NIRSPEC spectroscopy reveals broad, spatially extended Br? emission in 16 targets. Simple wind models for the line profiles provide good fits and imply ...

The scattering formulation for a coated infinite cylinder in an absorbing medium is presented in this paper. The cylinder is subjected to an arbitrarily polarized plane wave propagating in a general direction at the cylinder. The refractive index and magnetic permeability of the host medium, as well as those for the core and coating of the cylinder, can be real or complex. The ...

This dissertation describes my analysis of XMM-Newton observations of six Active Galactic Nuclei (AGN), concentrating on the high resolution spectroscopy of soft X-ray absorption features, and discusses the results in the context of the origins and astrophysical implications of ionised outflows in AGN. I studied two Seyfert galaxies (NGC 3783 and NGC 7469) and four BL Lac ...

Cyanobacteria are photosynthetic prokaryotes capable of protecting themselves from UV radiation through the biosynthesis of UV-absorbing secondary metabolites, such as the mycosporines and scytonemin. Scytonemin, a novel indolic-phenolic pigment, is found sequestered in the sheath, where it provides protection to the subtending cells during exposure to UV radiation. The ...

The fate of massive cold clumps, their internal structure, and collapse need to be characterized to understand the initial conditions for the formation of high-mass stars, stellar systems, and the origin of associations and clusters. We explore the onset of star formation in the 75 M {sub sun} SMM1 clump in the region ISOSS J18364-0221 using infrared and (sub-)millimeter ...

We employ detailed photoionization models to infer the physical conditions of intrinsic narrow absorption line systems found in high-resolution spectra of three quasars at z = 2.6-3.0. We focus on a family of intrinsic absorbers characterized by N V lines that are strong relative to the Ly? lines. The inferred physical conditions are similar for the three intrinsic N V ...

Starburst-driven winds are thought to play a prominent role in the chemical evolution of galaxies and the metal enrichment of the intergalactic medium. The coronal gas in the outflows may contain most of the metals recently ejected by supernovae. Such enrichment is conspicuously absent in the warm phase of the interstellar medium near young star clusters. ...

The observational consequences of the merger scenario for massive star formation are explored and contrasted with the gradual accumulation of mass by accretion. In high-density protostar clusters, envelopes and disks provide a viscous medium that can dissipate the kinetic energy of passing stars, greatly enhancing the probability of capture. Protostellar mergers may produce ...

Laser-driven Coulomb explosion can induce stimulated Raman scattering in cluster-embedded plasmas. The propagation and scattering of electromagnetic waves have been studied to show that Coulombic expansion of atomic clusters significantly modifies the scattering properties. When the cluster plasma collision is negligible, the cutoff ...

We present a new theoretical framework for modeling the fusion process of Lennard-Jones (LJ) clusters. Starting from the initial tetrahedral cluster configuration, adding new atoms to the system and absorbing its energy at each step, we find cluster growing paths up to the cluster size of 150 ...

The youngest super star clusters (SSCs) in the merging Antennae Galaxies (NGC 4038/39) drive supersonic mass-loaded outflows from the HII regions in which they are embedded. High-resolution K-band NIRSPEC spectroscopy reveals broad spatially extended Br-gamma emission in 16 targets. The radial velocity field of young clusters ...

The youngest super star clusters (SSCs) in the merging Antennae Galaxies (NGC 4038/39) drive supersonic mass-loaded outflows from the HII regions in which they are embedded. High-resolution K-band NIRSPEC spectroscopy reveals broad spatially extended Br-gamma emission in 16 targets. The radial velocity field of young clusters ...

I present the results of spectral analysis and modeling of nine Chandra and XMM-Newton X-ray observations of NGC 4151, spanning the period 2000-2007. The complex and highly variable spectrum is characterized by attenuation of the intrinsic power-law continuum by nested absorption components, which contribute both broadband curvature in the 1-5 keV continuum, and individual line absorption. ...

We made deep near-infrared (JHKs) imaging polarimetry toward the Serpens cloud core, which is a nearby, active cluster forming region. The polarization vector maps show that the near-infrared reflection light in this region mainly originates from SVS 2 and SVS 20, and enable us to detect 24 small infrared reflection nebulae associated with young stellar objects. Polarization ...

Using a combined quantum mechanical/classical method, we study the dynamics of deposition of small Na clusters on Ar(001) surface. We work out basic mechanisms by systematic variation of substrate activity, impact energy, cluster orientations, cluster sizes, and charges. The soft Ar material is found to serve as an extremely efficient ...

I investigate the chemical evolution of the Universe in a series of cosmological hydrodynamic simulations with the purpose of finding a self- consistent evolutionary scenario of galaxy formation able to reproduce key observables focusing on the enrichment of the intergalactic medium (IGM). The most successful models I run and analyze use the scalings of momentum-driven feedback whereby UV photons ...

We investigated Ne(+) ions and Ne(n)(+) (n = 2-20) cluster ions desorbed from the surface of solid Ne by 1.0 keV Ar(+) ion impact. Kinetic energy analysis shows a considerably narrower energy distribution for Ne(n)(+) (n ? 3) ions than for Ne(n)(+) (n = 1, 2) ions. The dependence of ion yields on Ne film thickness indicates that cluster ions (n ? 3) are ...

The characteristic scales of the plasma processes in magnetic reconnection range from the elec-tron skin-depth to the magnetohydrodynamic (MHD) scale, and cross-scale coupling among them play a key role. Modeling these processes requires different physical models, viz. kinetic, electron-magnetohydrodynamics (EMHD), Hall-MHD, and MHD. The shortest scale processes are at the electron scale and these ...

We present XMM-Newton Reflection Grating Spectrometer observations of the soft X-ray spectrum of NGC 4051 and explore their implications for the inner accretion disk and ionized outflow in the active galactic nucleus. We fit the soft X-ray excess with a relativistically broadened O VIII recombination spectrum, including the entire line series and recombination continuum. This ...

We have observed a dramatic change in the spectrum of the formerly heavily absorbed 'overlapping-trough' iron low-ionization broad absorption line (FeLoBAL) quasar FBQS J1408+3054. Over a time-span of between 0.6 to 5 rest-frame years, the Mg II trough outflowing at 12 000 km s-1 decreased in equivalent width by a factor of 2 and the Fe II troughs at the ...

For the past decade, ionized outflows of a few 100 km s{sup -1} from nearby Seyfert galaxies have been studied in great detail using high-resolution X-ray absorption spectra. A recurring feature of these outflows is their broad ionization distribution including essentially ions (e.g., of Fe) from neutral to fully ionized. The absorption measure ...

Context. Outflows provide indirect means to gain insight into diverse star formation-associated phenomena. At the level of individual protostellar cores, both outflows and the intrinsic core properties can be used to study the mass accretion/ejection process of heavily embedded protostellar sources. Aims: The main objective of the paper is to study the ...

We present Submillimeter Array observations toward the 104.7 L sun star-forming region G240.31+0.07, in the J = 2-1 transition of 12CO and 13CO and at 1.3 mm continuum, as well as the 12CO and 13CO observations from the Caltech Submillimeter Observatory to recover the extended emission filtered out by the interferometer. Maps of the 12CO and 13CO emission show a bipolar, wide-angle, ...

We present Submillimeter Array observations toward the 10{sup 4.7} L {sub sun} star-forming region G240.31+0.07, in the J = 2-1 transition of {sup 12}CO and {sup 13}CO and at 1.3 mm continuum, as well as the {sup 12}CO and {sup 13}CO observations from the Caltech Submillimeter Observatory to recover the extended emission filtered out by the interferometer. Maps of the {sup 12}CO and {sup 13}CO ...

We use Chandra and XMM-Newton to study how the hot gas content in early-type galaxies varies with environment. We find that the L{sub X}-L{sub K} relationship is steeper for field galaxies than for comparable galaxies in groups and clusters. This suggests that internal processes such as supernovae driven winds or AGN feedback may expel hot gas from low mass field galaxies. ...

Flight 13 of ACE-Asia in the Yellow Sea at altitudes of 5,500 m, 700 m and 250 m. The high altitude clusters, their abundance and attachment to dust surfaces increases at low altitudes. Most isolated soot. This flight was selected because it included very high dust concentrations mixed with a range of soot

We present a layer-multiple-scattering method of electromagnetic waves for the study of periodic metamaterials formed as a lattice of cavities which are filled by clusters of spherical nanoparticles. Our approach is a three-stage process where we take fully into account all the multiple-scattering events involved: (a) among the spheres of the cluster ...

We describe recent discoveries of low column density (NHI = 1012.5-16.0 cm-2) H I Ly? absorbers made with the Hubble Space Telescope (HST) which have allowed us a first look at gas in local intergalactic space; i.e., between us and the "Great Wall". These absorbing clouds account for 29 � 4% of all baryons at z=0 and are, in general, only loosely related ...

We report the discovery of a nearby, embedded cluster of young stellar objects, associated filamentary infrared dark cloud, and 4.5 micron shock emission knots from outflows detected in Spitzer/IRAC mid-infrared imaging of the Serpens-Aquila Rift obtained as part of the Spitzer Gould Belt Legacy Survey. We also present radial velocity measurements of the ...

We have examined the interaction of deuterium clusters with high intensity, ultrafast laser radiation. Upon irradiation a hot plasma is created with a sufficient temperature to produce nuclear fusion. We have seen that larger clusters produce more fusion neutrons than smaller clusters, consistent with a Coulomb explosion model. Fusion ...

ASCA spectra of the central regions of three cooling flows, in the Perseus, Centaurus, and A1795 clusters, together with the spectrum of the center of the Coma Cluster, are studied. Absorbed, cooler and/or cooling components are required for the cooling flow spectra but not for that of the Coma Cluster. Problems ...

We argue that most strong intervening metal absorption line systems, where the rest equivalent width of the Mg II ?2796 line is >0.5 �, are interstellar material in, and outflowing from, star-forming disks. We show that a version of the Kennicutt-Schmidt law is readily obtained if the Mg II equivalent widths are interpreted as kinematic broadening from ...

We present a 2 month Suzaku X-ray monitoring of the Seyfert 1 galaxy NGC 5548. The campaign consists of seven observations (with exposure time of ~30 ks each), separated by ~1 week. This paper focus on the X-ray Imaging Spectrometer data of NGC 5548. We analyze the response in the opacity of the gas that forms the well-known ionized absorber in this source for ionizing flux ...

The effect of absorbed water on the dielectric properties of silicon dioxide nanoparticles is studied by the molecular dynamic method. It is demonstrated using the model of flexible molecules that increasing the number of water molecules in the (SiO2)50 cluster to 40 results in an enhancement of absorption of infrared radiation over the frequency range 0 ...

We detect high-velocity absorbing gas using Hubble Space Telescope and Far Ultraviolet Spectroscopic Explorer medium-resolution spectroscopy along two high-latitude active galactic nucleus (AGN) sight lines (Mrk 1383 and PKS 2005-489) above and below the Galactic center (GC). These absorptions are most straightforwardly interpreted as a wind emanating from the GC that does ...

The baseline design of the GLD calorimeter is scintillator-strip arrays interleaved with absorber plates. We present preliminary performance studies of the hit clustering with this calorimeter using a simulator. Also, simulation results of a `digital' calorimeter, which is an option of the GLD calorimeter, are presented.

We present predictions for galactic halo baryon fractions from cosmological hydrodynamic simulations with a well-constrained model for galactic outflows. Without outflows, halos contain roughly the cosmic fraction of baryons, slightly lowered at high masses owing to pressure support from hot gas. The star formation efficiency is large and increases ...

X-ray images of galaxy clusters often display underdense bubbles which are apparently inflated by active galactic nucleus (AGN) outflow. I consider the evolution of the magnetic field inside such a bubble, using a mixture of analytic and numerical methods. It is found that the field relaxes into an equilibrium, filling the entire volume of the bubble. The ...

Context. In recent years, we have detected clear evidence of rotation in more than 5 hot molecular cores (HMCs). Their identification is confirmed by the fact that the rotation axes are parallel to the axes of the associated bipolar outflows. We have now pursued our investigation by extending the sample to 3 known massive cores, G10.62-0.38, G19.61-0.23, and G29.96-0.02. ...

In our galaxy, stars are born in clouds of gas, bodies so cold they do not emit any radiation at the visible wavelengths. Moreover, the clouds are permeated by cosmic dust, so that the visible radiation emitted by new stars is absorbed. Radiation at the wavelengths of infrared waves and the shortest radio waves penetrate these clouds. With the development of new telescopes and ...

Using a combined quantum-mechanical-classical method, we study the collisions of small Na clusters with large Ar clusters as a model for cluster deposition. We work out basic mechanisms by systematic variation of the collision energy, system sizes, and orientations. The soft Ar material is found to serve as an extremely efficient shock ...

Using a combined quantum-mechanical classical method, we study the collisions of small Na clusters with large Ar clusters as a model for cluster deposition. We work out basic mechanisms by systematic variation of the collision energy, system sizes, and orientations. The soft Ar material is found to serve as an extremely efficient shock ...

The experimental information on reactions induced by stopped ..pi../sup -/ absorbed in nuclei is critically reviewed. Evidence for the presence of ..cap alpha..-cluster absorptions is presented and arguments are given to show that approx. =25% of ..pi../sup -/ absorptions are of this kind. In the case of two-nucleon absorption, the existing experimental ...

This is a program to probe the large scale structure of baryons in the universe, including addressing questions of baryon fraction, physical conditions and relationships between absorbers and large-scale structures of galaxies. Besides these specific goals, this proposed GTO program also probes a large enough total path length in Ly alpha and OVI to add significantly to what ...

Context. The standard ?CDM cosmological model implies that all celestial bodies are embedded in a perfectly uniform dark energy background, represented by Einstein's cosmological constant, and experience its repulsive antigravity action. Aims: Can dark energy have strong dynamical effects on small cosmic scales as well as globally? Continuing our efforts to clarify this question, we now focus on ...

We here investigate the possibility that the observed collimated outflows in luminous infrared galaxies (LIGs) and some Seyfert galaxies can be produced in a starburst (SB) environment. In the former source class, in particular, there seems to be some observational evidence for the presence of nuclear SBs in some objects. A nuclear disk can be quickly produced by gas infall ...

We report on the discovery of a high-velocity narrow absorption line outflow in the redshift 2.3 quasar J212329.46 - 005052.9. Five distinct outflow systems are detected with velocity shifts from -9710 to -14 050 km s-1 and C IV ??1548, 1551 linewidths of FWHM ? 62-164 km s-1. This outflow is remarkable for having high speeds and a ...

We present Submillimeter Array (SMA) ? = 0.88 mm observations of an infrared dark cloud G28.34+0.06. Located in the quiescent southern part of the G28.34 cloud, the region of interest is a massive (>103 M sun) molecular clump P1 with a luminosity of ~103 L sun, where our previous SMA observations at 1.3 mm have revealed a string of five dust cores of 22-64 M sun along the 1 pc IR-dark filament. ...

We report the discovery of an outflow and a molecular cavity at the Norma near-arm around the young Super Star Cluster (SSC) Westerlund 1 (Wd1). Association of the SSC Wd1 with the cavity and the molecular out-flow is discussed based on the observed kinematics from CO and HI emission, and also in the observed HI absorptions. We ...

Our detailed Chandra study of the Hydra A cluster indicates the presence of multiphase gas along soft filaments. We estimate that 10^{11}M_{&sun;} of low-entropy material has been dredged up by the rising lobes from the central 30 kpc to the observed current position of �100 kpc. The outflow amounts to a few hundreds M_{&sun;}/yr, which is ...

Pulse radiolytic reduction of silver ions leads to an oligomeric cluster absorbing at 295 nm and most intensely and sharply at 325 nm. The cluster has a half-life of >5 min in scrupulously clean reaction vessels. During its decay, larger metallic particles absorbing around 380 nm are produced. The ...

We present results from three Suzaku observations of the z = 3.91 gravitationally lensed broad absorption line quasar APM 08279+5255. We detect strong and broad absorption at rest-frame energies of lsim2 keV (low energy) and 7-12 keV (high energy). The detection of these features confirms the results of previous long-exposure (80-90 ks) Chandra and XMM-Newton observations. The low- and high-energy ...

We present results from three Suzaku observations of the z =3.91 gravitationally lensed broad absorption line quasar APM 08279+5255. We detect strong and broad absorption at rest-frame energies of <2 keV (low-energy) and 7-12 keV (high-energy). The detection of these features confirms the results of previous long-exposure (80-90 ks) Chandra and XMM-Newton observations. The low and high-energy ...

Four Chandra High Energy Transmission Grating spectra of Mrk 290, a bright Seyfert 1, were carried out in 2003 with a total integration time of 251 ks. The nuclear X-ray spectrum is best described by a absorbed power law of photon index ? 1.83 plus a black body model with a temperature of 90 eV. Using the combined spectra, we detect significant absorption lines due to ...

Numerical solutions to the problem of infall of matter into clusters of galaxies are presented. It is assumed that the universe can be described by a Friedmann cosmological model with H$sub 0$=50 km s$sup -1$ Mpc$sup -1$. It is found that physically reasonable models having q$sub 0$=1/2 lead to excessive X- ray emission from clusters of galaxies. ...

We used UKIRT near infrared (NIR) broad band JHK photometry, narrow band imaging of the 1-0S(1) molecular hydrogen emission line and mid infrared Spitzer IRAC data to investigate the nature of the young cluster Mercer14. Foreground star counts in decontaminated NIR photometry and a comparison with the Besancon Galaxy Model are performed to estimate the ...

The detection of emission from the v 1 approaches 0 S(1) quadrupole transition of H2 toward the cluster of intense infrared and H2O maser sources in W51 (north) is reported. The apparent luminosity of this line in W51 (north) is only about 4% of the luminosity of the same line toward the Kleinmann-Low infrared cluster in Orion however, additional ...

In some massive stars, magnetic fields are thought to confine the outflowing radiatively-driven wind. Although theoretical models and MHD simulations are able to illustrate the dynamics of such a magnetized wind, the impact of this wind-field interaction on the observable properties of a magnetic star - X-ray emission, photometric and spectral variability - is still unclear. ...

Context: This is the third in a series of papers devoted to studying intermediate-mass molecular outflows and their powering sources in detail and with high-angular resolution. Aims: This paper studies the intermediate-mass YSO IRAS 20050+2720 and its molecular outflow and puts the results of this and the previous studied sources in the context of ...

A generally annular condenser compartment of a nuclear reactor containment structure contains a large quantity of fusible material in a solid state, such as ice, for absorbing the energy released from a loss-of-coolant accident in the reactor coolant system. Inlet and outlet doors, which are normally closed, are provided at the bottom and the top, respectively, of the ...

Broad absorption lines (BALs) in quasar spectra identify high-velocity outflows that likely exist in all quasars and could play a major role in feedback to galaxy evolution. The variability of BALs can help us understand the structure, evolution and basic physical properties of the outflows. Here we report on our first results from an ongoing BAL ...

We have analyzed the properties of the Na D doublet lines at ??5890, 5896 � in a large sample of 691 radio galaxies using the Sloan Digital Sky Survey (SDSS). These radio galaxies are resolved in the FIRST survey, have redshifts less that 0.2 and radio flux densities at 1.4 GHz higher than 40 mJy. The sample is complete within the main spectroscopic magnitude limits of the SDSS. Approximately ...

Outflows are seen prominently in the UV spectra of Broad Absorption Line (BAL) QSOs. Models of radiatively-driven outflows predict that the velocity should scale with UV luminosity. Observations show that the UV luminosity only provides a cap to the velocity. One explanation is that the X-ray absorbing gas in an individual quasar ...

We present a detailed analysis of the Astrophysical Research Consortium 3.5 m telescope spectrum of QSO SDSS J0838+2955. The object shows three broad absorption line (BAL) systems at 22,000, 13,000, and 4900 km s{sup -1} blueshifted from the systemic redshift of z = 2.043. Of particular interest is the lowest velocity system that displays absorption from low-ionization species such as Mg II, Al ...

We present the results of a uniform and systematic search for blueshifted Fe K absorption lines in the X-ray spectra of five bright broad-line radio galaxies observed with Suzaku. We detect, for the first time in radio-loud active galactic nuclei (AGNs) at X-rays, several absorption lines at energies greater than 7 keV in three out of five sources, namely, 3C 111, 3C 120, and 3C 390.3. The lines ...

We propose to reanalyze the intrinsic absorption data from nearby Seyfert 1 galaxies, which are indicative of outflows emanating from the AGN. The main goal is to improve our understanding of the ionization equilibrium and abundances {IEA} in these outflows. To do so we will use analysis methods we developed in studying high-z quasar ...

We request 250 ksec of Chandra HETGS observations of the Seyfert 1 Ark 564. This source is known to have a broad range of ionized absorbers in outflow, seen against the strong soft continuum. The primary goal of these observations is to study the unresolved transition array (UTA) of Fe-L in this source, which provides the highest continuum level at the UTA ...

We present an analysis of the Mg II ??2796, 2803 and Fe II ??2586, 2600 absorption line profiles in co-added spectra of 468 galaxies at 0.7 < z < 1.5. The galaxy sample, drawn from the Team Keck Treasury Redshift Survey of the GOODS-N field, has a range in stellar mass (M *) comparable to that of the sample at z ~ 1.4 analyzed in a similar manner by Weiner et al. (W09), but extends to lower ...

The largest catalog of strong MgII absorbers to date derived from the Sloan Digital Sky Survey (SDSS) quasar spectra was employed to describe statistical properties of absorbers and their clustering along sight lines as a function of redshift and rest-equivalent width (REW). The association of SDSS galaxies with MgII systems was ...

The EJS Shapley's Globular Clusters Model shows the distribution of globular clusters around the plane of the Milky Way as determined by Harlow Shapley in 1918. The Space View frame shows a 3D view of the distribution of the clusters around the galactic plane, along with the location of the Sun and Shapley's location for the galactic ...

We analyze a 137 ks exposure X-ray spectrum of the Seyfert 1 galaxy NGC 5548 obtained with the XMM-Newton Reflection Grating Spectrometer. Due to the long exposure time, the spectrum is of higher statistical quality than the previous observations of this AGN. Therefore, we detect for the first time in NGC 5548 inner-shell transitions from O Iii to O Vi ions, and the Unresolved Transition Array of ...

We study the connections between ongoing star formation, galaxy mass, and extended halo gas, in order to distinguish between starburst-driven outflows and infalling clouds that produce the majority of observed Mg II absorbers at large galactic radii (gsim10 h -1 kpc) and to gain insights into halo gas contents around galaxies. We present new measurements ...

We present an empirical connection between cold (�104 K) gas in galactic haloes and star formation. Using a sample of more than 8500 Mg II absorbers from Sloan Digital Sky Survey (SDSS) quasar spectra, we report the detection of a 15? correlation between the rest equivalent width W0 of Mg II absorbers and the associated [O II] luminosity, an estimator of ...

We analyze the Chandra High Energy Transmission Grating Spectrometer observation of the Seyfert 2 AGN IRAS 18325-5926. We detect a v = -360+41 -66 km s-1 blueshifted ionized absorber in the X-ray spectrum, with photoionization parameter log ? = 2.0+0.1 -0.1 and hydrogen column density N H = 1.55+0.75 -0.38 � 1021 cm-2. The absorber may be a photoionized ...

Context: With the new generation of high-resolution X-ray spectrometers the understanding of warm absorbers in active galactic nuclei has improved considerably. However, the important questions regarding the distance and structure of the photoionised wind remain unsolved. Aims: To constrain the distance of the photoionised wind, we study the variability of the continuum, ...

The interactions of displacement cascades with helium-vacancy clusters in ?-Fe are investigated using molecular dynamics simulations. Initial He-vacancy clusters consist of 20 vacancies with a helium-to-vacancy ratio ranged from 0.2 to 3 and primary knock-on atom (PKA) energy, Ep, varies from 2 keV to 10 keV. The results show that the effect of ...

There exists a significant population of broad line, z� 2 quasi-stellar objects (QSOs) which have heavily absorbed X-ray spectra. Follow-up observations in the submillimetre show that these QSOs are embedded in ultraluminous starburst galaxies, unlike most unabsorbed QSOs at the same redshifts and luminosities. Here we present X-ray spectra from XMM-Newton for a sample of ...

There exists a significant population of broad line, z� 2 quasi-stellar objects (QSOs) which have heavily absorbed X-ray spectra. Follow-up observations in the submillimetre show that these QSOs are embedded in ultraluminous starburst galaxies, unlike most unabsorbed QSOs at the same redshifts and luminosities. Here we present X-ray spectra from XMM-Newton for a sample of ...

There exists a significant population of broad line, z~2 QSOs which have heavily absorbed X-ray spectra. Follow up observations in the submillimetre show that these QSOs are embedded in ultraluminous starburst galaxies, unlike most unabsorbed QSOs at the same redshifts and luminosities. Here we present X-ray spectra from XMM-Newton for a sample of 5 such X-ray ...

. We are conducting an unbiased search at 2.12m for embedded molecular hydrogen jets thought to be associated with very young stellar objects, deeply embedded in dense cores in the Orion A molecular cloud. As a first result, we show a 0.4\\Theta0.5 degree mosaic centred on the L 1641-N complex, revealing a number of previously unknown knots and chains of H 2 emission. A 5\\Theta5 arcmin close-up ...