A fundamental astrophysical question is the role of gas in galaxy evolution. Mg II absorption as observed in quasar spectra is found to arise in a broad range of gaseous galactic environments. But the overall relationship between the distribution of Mg II absorbers, their host galaxies, and the larger scale galactic structure is not ...
NASA Astrophysics Data System (ADS)
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 damped and sub-damped Ly? absorption (DLA and sub-DLA) line systems in quasar spectra are believed to be produced by intervening galaxies. However, the connection of quasar absorbers to galaxies is not well-understood, since attempts to image the absorbing galaxies have ...
The damped and sub-damped Ly{alpha} absorption (DLA and sub-DLA) line systems in quasar spectra are believed to be produced by intervening galaxies. However, the connection of quasar absorbers to galaxies is not well-understood, since attempts to image the absorbing ...
Energy Citations Database
In recent years, an extremely successful method to study galaxy formation and evolution, has been provided by observation of quasar absorbers. Quasar absorbers are systems intercepting our line-of-sight to a given quasar and thus produce a feature in the quasar spectrum, the so-called absorption lines. The Damped Lyman-a (DLA) and ...
We present deep ground based imaging of the environments of five quasi-stellar objects (QSOs) that contain sub-damped Lyman ? (sub-DLA) systems at z < 1 with the Southern Observatories Astrophysics Research (SOAR) telescope and SOAR Optical Imager (SOI) camera. We detect a clear surplus of galaxies in these small fields, supporting ...
We present K-band imaging of fields around 30 strong CaII absorption-line systems, at 0.7 < z < 1.2, three of which are confirmed damped Lyman ? systems. A significant excess of galaxies is found within 6.0 arcsec (~=50kpc) from the absorber line of sight. The excess galaxies are preferentially luminous ...
We present an H I 21 cm absorption survey with the Green Bank Telescope (GBT) of galaxy-quasar pairs selected by combining galaxy data from the Sloan Digital Sky Survey (SDSS) and radio sources from the Faint Images of the Radio Sky at Twenty-Centimeters (FIRST) survey. Our sample consists of 23 sight lines through 15 low-redshift ...
This image of the Antennae galaxies is the sharpest yet of this merging pair of galaxies. During the course of the collision, billions of stars will be ...
NASA Website
We study the distribution and nature of neutral hydrogen in various environments. We start by exploring the disk and halos of galaxies in Chapter 1. Our sample consists of 23 sightlines through 15 low-redshift foreground galaxy - background quasar pairs with impact parameters ranging from 1.7 kpc up to 86.7 kpc. We detected one ...
We compare the kinematics and absorption properties of a sample of 30 strong MgII absorbers at z<1 to their host galaxy impact parameters and luminosities. The MgII absorption properties are derived from high resolution quasar spectra from the HIRES/Keck and UVES/VLT public archives. The host galaxy properties come from the larger ...
The Cosmic Origins Spectrograph (COS) will be installed aboard HST in August, 2008. The unprecedented far-UV throughput of COS (20-30 times that of STIS at R ~ 20,000) will revolutionize many studies, including the investigation of the local intergalactic medium (IGM). In particular, COS will allow us to refine estimates of the baryon content and metallicity of the IGM, as well as the relationship ...
This research focuses on understanding the formation and evolution of galaxies via their extended gaseous halos using the methods of quasar absorption line systems. Galaxy-absorber pairs provide direct observational constraints on competing scenarios aimed at establishing the role of gas in galaxy formation and evolution. Our sample ...
Absorption lines in quasar spectra allow us to locate and study intervening galaxies. In order to obtain a clearer picture of these absorber galaxies, we have used the Near-Infrared Camera Fabry-Perot System at Apache Point Observatory to obtain near-infrared broadband images in one or more filters (J and Ks ) of ...
We present simulated optical images of galaxies at high redshift using diverse and high-quality ultraviolet (UV) images of nearby galaxies obtained through the GALEX (Galaxy Evolution Explorer). Galaxy morphology plays an important role in the study of the evolution of ...
The Cosmic Origins Spectrograph (COS) was installed aboard the Hubble Space Telescope (HST) in May 2009 and is functioning nominally (see Fig. 1). The unprecedented far-UV throughput of COS (20-30 times that of STIS at R ~ 20,000) will revolutionize many studies, including the investigation of the local intergalactic medium (IGM). In particular, COS will allow us to refine estimates of the baryon ...
The Cosmic Origins Spectrograph (COS) will be installed aboard the Hubble Space Telescope (HST) in 2009. The unprecedented far-UV throughput of COS (20-30 times that of STIS at R ~ 20,000) will revolutionize many studies, including the investigation of the local intergalactic medium (IGM). In particular, COS will allow us to refine estimates of the baryon content and metallicity of the IGM, as ...
MgII QSO absorption lines detected in the spectra of background QSOs were used over a decade ago to infer that all redshift z > 0.2 galaxies have gaseous halos of radius ~ 60 kpc. The actual size of the halo was believed to be proportional to the luminosity of the galaxy. However, these conclusions are now much harder to understand in light of the ...
Nov 16, 2004 ... POPULAR TOPICS - STARS AND GALAXIES BANNER. Welcome to Stars and Galaxies. Look to the stars with images and features from NASA's ...
Jul 25, 2005 ... image highlighting hidden spiral arms of nearby galaxy Image right: This image from the Galaxy Evolution Explorer highlights hidden spiral ...
Mar 22, 2004 ... Chandra images of Groups & Clusters of Galaxies � ROSAT images of ... x-ray image of cluster of galaxies � Hidden cluster - XMM EPIC ...
We present results from a search for galaxies that give rise to damped Lyman ? (DLA), sub-DLA and Lyman limit system (LLS) absorption at redshifts 0.1 ?z? 1 in the spectra of background quasars. The sample was formed from a larger sample of strong Mg II absorbers (W?27960? 0.3 �) whose H I column densities were determined by measuring the Ly? line in ...
We present HST/WFPC2 broadband and ground-based H? images, H I 21 cm emission maps, and low-resolution optical spectra of the nearby galaxy ESO 1327-2041, which is located 38'' (14 h -1 70 kpc in projection) west of the quasar PKS 1327-206. Our Hubble Space Telescope (HST) images reveal that ESO 1327-2041 has a complex optical ...
An astronomer studying small irregular galaxies discovered a remarkable feature in one galaxy that may provide key clues to understanding how galaxies form and the relationship between the gas and the stars within galaxies. Liese van Zee of Indiana University, using the National Science Foundation's Very Large ...
I discuss the discovery of a population of extremely luminous, but very dusty and very distant, galaxies in the submillimetre (submm) waveband. Almost all the light emitted by the stars in these galaxies is absorbed by interstellar dust (which is produced by the same stars) and re-radiated in the far-infrared. This leaves little to be ...
PubMed
A Barred Spiral Galaxy, and the Small Elliptical Companion Galaxy NGC 1097A ... Barred Spiral Galaxy NGC 1365. PIA07901: Barred Spiral Galaxy NGC 1365 ...
This poster illustrates the visible and invisible aspects of galaxies. The central image compares an optical image of the Andromeda galaxy with its x-ray image. Other areas of the poster illustrate different types of galaxies, and the size and scale of star systems, ...
NSDL National Science Digital Library
... s pectrograph. Twenaty-f our stwotra ware obtarined of 20 galaxies and 5 stars. ... Table 1. Image-tube Spectra of Southern Galaxies, Cordoba, Auag. ...
DTIC Science & Technology
... Accession Number : AD0740922. Title : Spectra of Southern Galaxies with Carnegie Image Tube. ... It was used to observe galaxies from 26 Feb. ...
... Accession Number : AD0740921. Title : Spectra of Southern Galaxies with Carnegie Image Tube. ... It was used to observe galaxies from 26 Feb. ...
Whirlpool Galaxy. NASA's Galaxy Evolution Explorer found a tail behind a ... A composite image of M51, also known as the Whirlpool Galaxy, shows the majesty ...
The many 'personalities' of our great galactic neighbor, the Andromeda galaxy, are exposed in this new composite image from NASA's Galaxy Evolution Explorer ...
The outlying regions around the Southern Pinwheel galaxy, or M83, are highlighted in this composite image from NASA's Galaxy Evolution Explorer and the ...
We present results from an imaging and spectroscopic study of four strong Mg II absorbers of W(2796) {approx}> 1 A revealed by the afterglow of GRB 060418 at z{sub GRB} = 1.491. These absorbers, at z = 0.603, 0.656, 1.107, and z {sub GRB}, exhibit large ion abundances that suggest neutral gas columns characteristic of damped ...
We have used Galaxy IMage 2D (GIM2D) to quantify the morphological properties of 40 intermediate-redshift Mg II absorption-selected galaxies [0.03 ? Wr(2796) ? 2.9 �], imaged with WFPC-2/Hubble Space Telescope (HST), and compared them to the halo gas properties measured from HIRES/Keck and UVES/VLT quasar ...
We have used a Near-Infrared Camera and Multi-Object Spectrometer (NICMOS3) HgCdTe 256x256 array detector with the Infrared (IR) camera on the 2.3m telescope at Steward Observatory to image several Quasi-Stellar Object (QSO) fields. The limiting magnitude...
National Technical Information Service (NTIS)
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 outflows from ...
We carried out a Subaru and UKIRT near-infrared imaging survey for H?-emitting galaxies around two pair quasar systems (Q0301-005/Q0302-003 and Q2343+125/Q2344+125) and a triple quasar system (KP 76/KP 77/KP 78). Narrowband near-infrared filters covering the H? emission expected for galaxies at the confirmed C IV absorption redshift ...
We performed a spectroscopic galaxy survey, complete to mF814W <= 20.3 (LB > 0.15L*B at z = 0.3), within 100 � 100 arcsec2 of the quasar Q1127-145 (zem = 1.18). The Very Large Telescope/Ultraviolet and Visual Echelle Spectrograph (UVES) quasar spectrum contains three zabs < 0.33 MgII absorption systems. We obtained eight new galaxy redshifts, ...
The Warped Galaxy lithograph is one in a series designed to bring the latest Hubble Space Telescope images into the classroom. In the educational activity, In Search of ... Galaxies, students are introduced to the topic of galaxies, formulate questions, conduct research, organize their materials, and present a ...
'Death Star' Galaxy Black Hole Fires at Neighboring Galaxy. 12.17.07. A jet from a black hole at the center of a galaxy strikes the edge of. This composite image ...
Gamma-ray burst (GRB) afterglows offer a probe of the intergalactic medium (IGM) out to high redshift which complements observations along more abundant quasar lines of sight. Although both quasars and GRB afterglows should provide a priori random sightlines through the intervening IGM, it has been observed that strong Mg II absorbers are twice as likely to be found along ...
The Cosmic Origins Spectrograph (COS) will be installed aboard the Hubble Space Telescope (HST) in May, 2009. The unprecedented far-UV throughput of COS (20-30 times that of STIS at R ~ 20,000) will revolutionize many studies, including the investigation of the local intergalactic medium (IGM). In particular, COS will allow us to refine estimates of the baryon content and metallicity of the IGM, ...
In this paper, we analyze spectra of the Seyfert 1 galaxy NGC 4593 obtained with the Chandra Low Energy Transmission Grating Spectrometer (LETGS), the Reflection Grating Spectrometer (RGS) and the European Photon Imaging Camera's (EPIC) onboard of XMM-Newton. The two observations were separated by ~ 7 months. In the LETGS spectrum we detect a highly ...
This dissertation reports results from detailed two-dimensional X-ray images of three radio galaxies obtained with the High Resolution Imager and Imaging Proportional Counter on board the Einstein X-ray Observatory (HEAO-B satellite). The images reveal several distinct sources of X-ray emission ...
Apr 9, 2009 ... Image of the Barred Spiral Galaxy NGC 1300. Image left: Image of the Barred Spiral Galaxy NGC 1300 - taken by the Hubble Telescope. ...
This image of the Globular cluster Messier 2 (M2) was taken by NASA's Galaxy Evolution Explorer on August 20, 2003. This image is a small section of a ...
Mar 1, 2005 ... Image of the Barred Spiral Galaxy NGC 1300. Image left: Image of the Barred Spiral Galaxy NGC 1300 - taken by the Hubble Telescope. ...
Keyword Search. Many of the images in the Galaxy of Images are drawn from the Smithsonian Libraries' extensive Natural History collections. When possible, the scientific, or...
Science.gov Websites
Keyword Search: Submit Many of the images in the Galaxy of Images are drawn from the Smithsonian Libraries' extensive Natural History collections. When possible, the scientific, or...
Jun 26, 2003 ... M51, the Whirlpool Galaxy, is shown here at multiple wavelengths. The top image is an Einstein HRI image, the middle is a red emission ...
Globular Clusters Galaxies Thumbnail Image Description Caption NASA IDs Image Size Hi-Resolution TIFF? Thumbnail of image Image of the spiral galaxy NGC 4414. Caption...
The gas added to and removed from galaxies over cosmic time greatly affects their stellar populations and star formation rates. QSO absorption line studies in close QSO/galaxy pairs create a unique opportunity to study the physical conditions and kinematics of this gas. Here we present new Hubble Space Telescope (HST) images of the ...
The ground-based image in visible light locates the hub imaged with the Hubble Space Telescope. This
NASA Technical Reports Server (NTRS)
... It was used to observe galaxies frce 26 Feb. to 4 liar. ... Twenty-four spectra were obtained of 211 galaxies and 5 stars. -.. , ...
Jan 16, 2007 ... NASA's Galaxy Evolution Explorer and Spitzer Space Telescope combined to show a pair of interacting galaxies might be experiencing the ...
Sep 7, 2004 ... Fire within the Antennae Galaxies ... Visible light from stars in the galaxies ( blue and green) is shown together with infrared light from ...
Apr 28, 2009 ... NASA's Galaxy Evolution Explorer Mission celebrates its sixth anniversary studying galaxies beyond our Milky Way through ...
This image of the dwarf spiral galaxy NGC 247 was taken by NASA's Galaxy Evolution Explorer. Galaxy NGC 247. This anaglyph view of 'Shark' was produced by ...
Mar 12, 1995 ... UIT captured the mission's first images of the Whirlpool Galaxy (M 51) ... The Whirlpool Galaxy is the larger of two interacting galaxies ...
Jan 13, 2011 ... It is likely these partner galaxies will continue to dance around ... "It's striking how the same event stimulated a classic spiral galaxy ...
Jul 25, 2005 ... A new image from NASA's Galaxy Evolution Explorer shows that a galaxy once thought to be rather plain and old is actually endowed with a ...
Apr 28, 2008 ... Full image and caption Since its launch five years ago, the Galaxy Evolution Explorer has photographed hundreds of millions of galaxies in ...
Oct 31, 2008 ... When the Galaxy Evolution Explorer spied the galaxy in ultraviolet ... The Galaxy Evolution Explorer is a relatively low-cost NASA mission, ...
Visible Light, 3180x2456x3. M81 Galaxy is Pretty in Pink ..... Fire within the Antennae Galaxies. PIA06854: Fire within the Antennae Galaxies ...
Little Galaxies Pack a Big Punch These postage-stamp images taken by NASA's Galaxy Evolution Explorer are helping to solve a mystery -- why do the littlest of galaxies produce...
Chandra's image of the elliptical galaxy NGC 4697 reveals diffuse hot gas dotted with many point-like sources. As in the elliptical galaxies, ...
Sep 10, 2007 ... Each day a different image or photograph of our fascinating ... These small galaxies are thought to be the building blocks of modern galaxies. ...
A prominent example occurs on the left of the above image of the rich cluster of galaxies Abell 1185. There at least two galaxies, cataloged as Arp 105 and ...
A cooling flow in the Galaxy Cluster Abell 1795. Like a spoon moving through hot soup, the massive elliptical galaxy near the top of this image has cut a ...
May 5, 2005 ... Ultraviolet image of the interacting pair NGC 1097, a barred spiral galaxy, and the small elliptical companion galaxy NGC 1097A. ...
Galaxy cluster mash-up. This image shows a massive galaxy cluster called MACS J0717.5+3745. It consists of four smaller galaxy clusters colliding. ...
A large elliptical galaxy is visible in the center of the image, ... It shows white and blue galaxies centered around a large elliptical galaxy. ...
the poster shows the center of the Whirlpool Galaxy (M51). The small images across the bottom of the poster show the Whirlpool Galaxy as it ...
Ultraviolet image of the barred spiral galaxy NGC 1365, which is a member of the Fornax Cluster of Galaxies. ID: PIA07901 ...
Oct 30, 2007 ... Promotional image for building a better guide to the galaxy, 02.16.06 - Building a Better Guide to the Galaxy ...
Nov 29, 2007 ... Promotional image for building a better guide to the galaxy, 02.14.06 - Building a better guide to the galaxy ...
the constellation of Orion. The crystals are from ...� View Image Giant cluster of elliptical galaxies Peering Through the Lens of a Galaxy Cluster The giant cluster of...
This videotape is comprised of four segments: (1) a Video zoom in on galaxy M32 using ground images,
The Milky Way. Image of galaxy that looks much like the Milky Way. The Milkyway is approximately 925000000000000000 ...
When the universe was young, massive galaxies were forming regularly, like baby bees in a bustling hive. In t... : View Image � Cartwheel galaxy ...
This SolStation article provides basic information about the Andromeda Galaxy. It includes multiwavelength images, the history of discovery, and recent research developments.
We present high angular resolution (~2 mas) radio continuum observations of five Seyfert galaxies with flat-spectrum radio nuclei, using the VLBA at 8.4 GHz. The goal of the project is to test whether these flat-spectrum cores represent thermal emission from the accretion disk, as inferred previously by Gallimore et al. for NGC 1068, or nonthermal, synchrotron ...
Star-formation at high redshift occurs in two types of galaxies: dusty Ultra-Luminous Infrared Galaxies (ULIRGs) and UV-bright Lyman Break Galaxies (LBGs). In both populations dust absorbs most of the ultraviolet (UV) light from young stars and re-emits the energy in the infrared (IR). Therefore, detailed studies ...
We present an analysis of three strong, intervening Mg II absorption systems (zabs = 0.603, 0.656, 1.107) towards the optical afterglow of gamma-ray burst (GRB) 060418. From high-resolution Ultraviolet and Visual Echelle Spectrograph (UVES) spectra we measure metal column densities and find that the highest redshift absorber exhibits a large amount of dust depletion compared ...
We propose to obtain high resolution WFPC2 images of the field of 3C 336, a quasar with z=0.927 in whose spectrum 3 foreground MgII absorption systems with z= 0.472, 0.656, and 0.892 are known, making it the richest field in a nearly completed survey for absorption--selected galaxies which we have been conducting using ground-based observations. Optical ...
Large-scale redshift surveys tracing the evolution of the luminous components of galaxies have revealed both an increase in the number density of "red and dead" galaxies and a concomitant decline in the star formation rates (SFRs) of blue galaxies since z � 1. The latter is predicted to be due to a decreasing cool gas supply over ...
At intermediate redshifts, Ly-alpha absorbers cluster around rich metal-line systems [those with numerous low and high ionization species {Bahcall et al.}], and at z=3, higher ionization clouds reside at the velocity extremes of clustered Ly-alpha lines, a signature of the physics of collapse and layered gas structures {Songaila & Cowie}. These extraordinary HI ...
Reliable inference on galaxy morphology from quantitative analysis of ensemble galaxy images is challenging but essential ingredient in studying galaxy formation and evolution, utilizing current and forthcoming large scale surveys. To put galaxy image decomposition problem ...
The absorption features seen in the spectra of quasi-stellar objects (QSOs) provide a unique opportunity to probe the galactic and intergalactic regions which intersect the lines of sight (LOS). Understanding the environment of these absorbers allows us to make a connection with physical structures and study the properties and evolution of galaxies, the ...
This website contains many images of Messier objects, galaxies, interacting galaxies, active galaxies, clusters, comets, and interstellar material. Each image links the user to more information about the object and the telescope that took it.
One hundred fifty-four discrete non-nuclear ultraluminous X-ray (ULX) sources, with spectroscopically determined intrinsic X-ray luminosities greater than 1039 ergs s-1, are identified in 82 galaxies observed with Chandra's Advanced CCD Imaging Spectrometer. Source positions, X-ray luminosities, and spectral and timing characteristics are tabulated. ...
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 ...
Dec 4, 1999 ... The image from NASA's Hubble Telescope shows spiral arms and dust clouds in the nearby Whirlpool galaxy. Visible starlight and light from ...
Mar 16, 2006 ... This infrared image from NASA's Spitzer Space Telescope shows a galaxy that appears to be sizzling hot, with huge plumes of smoke swirling ...
North America Nebula in Different Lights. By spying on a neighboring galaxy, NASA's Hubble Space Telescope has captured an image of. Galaxy NGC 1850 ...
A rainbow of colors is captured in the center of a magnificent barred spiral galaxy,. Galaxy NGC 1512. This infrared image from NASA's Wide-field Infrared ...
Feb 12, 2008 ... A massive cluster of yellowish galaxies is seemingly caught in a spider web of eerily distorted background galaxies in the left-hand image, ...
The image from NASA's Hubble Telescope shows spiral arms and dust clouds in the nearby Whirlpool galaxy. Visible starlight and light from the emission of ...
These postage-stamp images taken by NASA's Galaxy Evolution Explorer are ..... cloud in our Milky Way galaxy, also known as the Running Chicken nebula. ...
Whirlpool Galaxy. This image shows the first-ever map of the surface of an exoplanet, or ... A composite image of M51, also known as the Whirlpool Galaxy, ...
Aug 11, 2010 ... images of these elliptical galaxies. With the HST images, ... light surrounding about three-fourths of these elliptical galaxies. ...
Feb 25, 2000 ... ROSAT images of Clusters of Galaxies. Coma sm � Abell 2256 � Perseus sm � Perseus x-ray sm � The Coma Cluster ... The Virgo Cluster ...
Oct 4, 2007 ... A ROSAT HRI image of the region around the galaxy NGC 1275 at the centre of the Perseus cluster of galaxies. The contour lines show the ...
This diagram based on results from NASA's Galaxy Evolution Explorer and the ... These postage-stamp images taken by NASA's Galaxy Evolution Explorer are ...
That doesn't mean that galaxy-galaxy collisions are not accompanied with their own fireworks, however. The image above shows an X-ray image, obtained by the ...
Aug 15, 2005 ... This is a catalog of galaxies observed in the X-ray band with the Einstein Observatory imaging instruments, the Imaging Proportional Counter ...
The edge-on galaxy near the top of the image is VV 340 North and the face-on galaxy at the bottom of the image is VV 340 South.
This color image from the Hubble Space Telescope (HST) shows a region in NGC 1365, a barred spiral galaxy located in a cluster of galaxies called Fornax.
With a 19.5 ks Chandra exposure we have imaged the intracluster medium around the radio galaxy 3C294 at redshift z=1.786. The temperature of the gas is 5 +/- 1.5 keV. We propose here to observe the cluster for ten times longer in order to determine the temperature to within 0.5 keV, measure the metallicity to 0.2 solar, and search for any large temperature ...
We develop a method for interpreting faint galaxy data which focuses on the integrated light radiated from the galaxy population as a whole. The emission history of the universe at ultraviolet, optical, and near-infrared wavelengths is modeled from the present epoch to z ~ 4 by tracing the evolution with cosmic time of the galaxy ...
NASA's Galaxy Evolution Explorer found a tail behind a galaxy called IC 3418. This star-studded tail was created as the galaxy plunged into gas in a family ...
The Very Large Array and WSTR H I synthesis observations of seven irregular galaxies are presented. The total H I images of four Local Group dwarf irregular galaxies and three larger more distant irregular galaxies are constructed at the identical resolut...
Contents: On the origin of extragalactic infrared radiation; Starbursts in non-interacting galaxies; Near infrared imaging of galaxies; The infrared photometric properties of the average galaxy; Near infrared spectroscopy of galaxies; A near infrared stud...
We present the methodology for, and the first results from, a new imaging programme aimed at identifying and characterizing the host galaxies of damped Lyman ? absorbers (DLAs) at z >~ 2. We target quasar sightlines with multiple optically thick HI absorbers and use the higher redshift system as a `blocking ...
We present imaging and spectroscopy of the quasar 3CR 196 (z(sub e) = 0.871), which has 21 cm and optical absorption at z(sub a) = 0.437. We observed the region of Ly alpha absorption in 3CR 196 at z(sub a) = 0.437 with the Faint Object Spectrograph on th...
We have measured the two-dimensional two-point correlation function, ?AG, between low-column-density Ly? absorbers and galaxies at a redshift z ~ 1. We measured Ly? absorbers between redshifts z = 0.68 and 1.51 over a total redshift path length of ?z = 1.08 from Hubble Space Telescope Space Telescope Imaging ...
We report on the detection of a population of weak metal-line absorbers in the halo or nearby intergalactic environment of the Milky Way. Using high-resolution ultraviolet absorption-line spectra of bright quasars (QSO) obtained with the Space Telescope Imaging Spectrograph (STIS), along six sight lines we have observed unsaturated, narrow absorption in O ...
We present an analysis of the Ly? forest towards 3C 273 from the Space Telescope Imaging Spectrograph at ~7kms-1 resolution, along with reprocessed data from the Far Ultraviolet Spectroscopic Explorer. The high ultraviolet flux of 3C 273 allows us to probe the weak, low-z absorbers. The main sample consists of 21 HI absorbers that we ...
We develop a method for interpreting faint galaxy data which focuses on the integrated light radiated from the galaxy population as a whole. The emission history of the universe at ultraviolet, optical, and near-infrared wavelengths is modeled from the present epoch to z~4 by tracing the evolution with cosmic time of the galaxy ...
E-print Network
We propose a snapshot survey of a complete sample of 80 OH megamaser galaxies. Each galaxy will be imaged with the ACS/WFC through F814W and a linear ramp filter {FR656N or FR716N or FR782N or FR853N} allowing us to study both the spheroid and the gas morphology in Halpha + [N II]. We will use the 9% ramps FR647M {5370-7570 ?} centred ...
The Cosmic Origins Spectrograph (COS) will be installed aboard HST in August, 2008. The unprecedented far-UV throughput of COS (20-30 times that of STIS at R ~ 20,000) will revolutionize many studies, including the investigation of the local intergalactic medium (IGM), its baryon content, metallicity, and relationship to galaxies. The COS Science Team has allocated ~ 200 HST ...
Dec 1, 2005 ... This false-color infrared image from NASA's Spitzer Space Telescope shows little 'dwarf galaxies' forming in the 'tails' of two larger galaxies that ...
Aug 11, 2010 ... 1 images found for "Galaxy Evolution Explorer (GALEX),Hubble ... Mission: Galaxy Evolution Explorer (GALEX),Hubble Space Telescope (HST) ...
Atlas Image mosaic, covering 7' x 7' on the sky of the interacting galaxies NGC 4038 and NGC 4039, better known as the Antennae, or Ring Tail galaxies. ...
Oct 7, 2003 ... A new image from NASA's Chandra X-ray Observatory reveals that one galaxy's loss is a galaxy cluster's gain. The composite image of M86 ...
HST images of the distant galaxy cluster MS1054-03 July 15, 1999: Exciting new images of more than a dozen very distant colliding galaxies have been ...
Jan 11, 2006 ... A new image from NASA's Galaxy Evolution Explorer completes a multi- wavelength, neon-colored portrait of the enormous Cartwheel galaxy ...
... The problem of positioning the solar focal spot on the thruster absorber is due to the visual complexity of the absorber, which is compounded by ...
We present an analysis of a new XMM-Newton observation of the Seyfert 1 galaxy NGC 985. The European Photon Imaging Camera (EPIC) spectra present strong residuals to a single power-law model, indicating the presence of ionized absorbing gas and a soft excess. A broadband fit to the EPIC and RGS spectra shows that the continuum can be ...
This Hubble Space Telescope image shows the diversity of galaxies in the universe. A huge elliptical galaxy, designated ESO 325-G004, dominates the image. In addition to many elliptical and spiral galaxies, the image contains a few small irregular ...
-0.15truein Recently, the nearby star-forming dwarf galaxy SBS 1543+593 {z=0.009} was discovered to be superimposed upon the bright quasar HS 1543+5921 {z 0.8, m_B=16.8}. Very few such alignments are known, making HS 1543+5921/SBS 1543+593 a unique system for absorption-line studies with HST. In order to investigate the properties of SBS 1543+593 and determine the utility of ...
Virtually all massive galaxies, including our own, host central black holes ranging in mass from millions to billions of solar masses. The growth of these black holes releases vast amounts of energy that powers quasars and other weaker active galactic nuclei. A tiny fraction of this energy, if absorbed by the host galaxy, could halt ...
The new CCD imaging program of the representative sample of Seyfert galaxies is shortly described. Various morphological details, revealed in broad band colour images, in H_alpha -emission images and in Laplace-filtered images, are discussed for two galaxies in this sample.
In the first paper of the series, Roshi, Kantharia & Anantharamaiah published the Galactic plane survey of carbon recombination lines (CRRLs) at 327 MHz. CRRLs were extensively detected from the inner Galaxy (longitudes <20�). We report here, for the first time, the association of low-frequency CRRLs with H I self-absorbing clouds in the inner ...
This Hubble Space Telescope image of M101 showcases a spiral galaxy's well-known features. The text describes the features that are common to all spiral galaxies. In the accompanying educational activity, In Search of...Spiral Galaxies, students investigate the structure of spiral galaxies ...
This activity asks students to observe the images of three spiral galaxies of different surface brightnesses. Each of the loaded images is active in the sense that you can place a rectangular aperture on them and determine the flux. The flux through the aperture equals the galaxy flux + the sky flux. Hence to ...
This site discusses the different types of active galaxies: Double-Lobed radio galaxies, Seyfert Galaxies, BL Lac Objects, and quasars. These pages discuss the structure, components, behavior, and provide an image or diagram for each type. They also provide information about the role black holes may have in ...
NGC 6822. Below is an image of the gloriously ornamented galaxy NGC 6822. Image courtesy of Romano Corradi. ...
A VLBI radio images of the bright supernova 1986J, which occurred in the galaxy NGC891 at a distance
Aims: We report on the discovery and properties of the fading afterglow and underlying host galaxy of GRB 071028B, thereby facilitating a detailed comparison between these two. Methods: Observations were performed with the Gamma-ray Burst Optical and Near-infrared Detector at the 2.2 m telescope on the La Silla Paranal Observatory in Chile. We conducted five observations from ...
We present new UV spectra of the nucleus of the Seyfert 1 galaxy NGC 5548, which we obtained with the Space Telescope Imaging Spectrograph at high spectral resolution, in conjunction with simultaneous Chandra X-Ray Observatory spectra. Taking advantage of the low UV continuum and broad emission-line fluxes, we have determined that the deepest UV absorption ...
We present new UV spectra of the nucleus of the Seyfert 1 galaxy NGC 5548, obtained with the Space Telescope Imaging Spectrograph at high spectral resolution (? /? ? = 30,000 - 46,000), simultaneously with Chandra X-ray Observatory spectra. Taking advantage of the low UV continuum and broad emission-line fluxes, we have determined that the deepest UV ...
We present simultaneous X-ray, far-ultraviolet, and near-ultraviolet spectra of the Seyfert 1 galaxy NGC 7469 obtained with the Chandra X-Ray Observatory, the Far Ultraviolet Spectroscopic Explorer, and the Space Telescope Imaging Spectrograph on the Hubble Space Telescope. Previous non-simultaneous observations of this galaxy found ...
NGC 4945 is one of the brightest Se.yfert galaxies on the sky at 100 keV, but is completely absorbed
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, ...
This image gallery from the National Radio Astronomy Observatory (NRAO) shows radio images of the center of the Milky Way Galaxy. For each image, background information is supplied.
Abell 754. image described below. A ROSAT PSPC image of the cluster Abell 754 with an exposure time of 13.0 ks. This image has been smoothed with a 15" ...
Abell 222/223. image described below. A ROSAT PSPC image of the clusters Abell 222/223 with an exposure time of 6.8 ksec. This image has been smoothed with ...
Abell 1795. image described below. A ROSAT PSPC image of the cluster A1795. This image has been smoothed with a 15" gaussian and only includes photons in ...
Abell 119. image described below. A ROSAT PSPC image of the cluster A119 with an exposure time of 15.2 ksec. This image has been smoothed with a 15" ...
high resolution images (for any purpose), please consult the Libraries' Image Use Fee Schedule. 4. Are your fees available online? Yes, please consult the Libraries' Image...
We describe an image analysis supervised learning algorithm that can automatically classify galaxy images. The algorithm is first trained using a manually classified images of elliptical, spiral, and edge-on galaxies. A large set of image features is extracted from each ...
PubMed Central
We present the first results of an observational programme at the ESO Very Large Telescope aimed at detecting a large sample of high-redshift galaxies fainter than the current spectroscopic limit of R=25.5 for Lyman-Break galaxies. In this paper, we describe the results of deep narrow and broad-band imaging and subsequent follow-up ...
Galaxy morphology provides clues about the processes in the understanding of the formation and evolution of galaxies. In this respect, the prediction of optical-band morphologies at high redshifts requires ultraviolet (UV) images of local galaxies with various morphologies. We simulated optical ...
The Interacting Galaxies Arp 147 lithograph contains an HST image of galaxies that appear to form the number 10. The text describes the image and provides a brief explanation of why astronomer Halton Arp compiled his catalogue of odd-looking galaxies in the 1960s. The accompanying classroom ...
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 ...
Two discoveries from a distant quasar - an enormous X-ray jet and an X-ray shadow cast by an intervening galaxy - are giving astronomers using NASA's Chandra X-ray Observatory cause to be doubly excited. These two independent results reveal information about a supermassive black hole at the center of the quasar as well as the amount of oxygen in a distant ...
We investigate the relative distribution of the gaseous contents of the Universe (as traced by a sample of Ly{alpha} absorbers), and the luminous baryonic matter (as traced by a redshift survey of galaxies in the same volume searched for Ly{alpha} absorbers), along 16 lines of sight (LOS) between redshifts 0 and 1. Our ...
The spectral energy distribution (SED) of the absorbed and unabsorbed objects are very different and so is their ratio of x-ray to total luminosity ...
... Subject Category: ACTIVE GALAXIES AND QUASARS Abstract: Photoionized, warm absorbing gas is an important component of the nuclear structure of AGN. ...
Jan 10, 2011 ... The detailed observations needed to see DIBs along a straight line ... which wavelengths are absorbed by all kinds of atoms and molecules. ...
observed and reflected rays Figure 2: Example of images with the reflected absorber image Figure 3: Result of the slope deviations from absorber deflectometry, in mrad Figure...
National Renewable Energy Laboratory (NREL)
... in the constellation Cassiopeia; Cyg A, an active galaxy in the constellation Cygnus; and Sgr A, the nuclear region of the Milky Way Galaxy in the ...
Mar 24, 2011 ... There's something special going on in the nearby Circinus galaxy, as revealed by this image from NASA's WISE telescope. The Circinus galaxy ...
May 29, 2007 ... Two large elliptical galaxies, NGC 4889 and NGC 4874 are shown in this image from NASA's Spitzer Space Telescope.
X-ray images of the rich clusters of galaxies A1560, A2356, and A2384 show that the individual X-ray
We present the results of a very deep K-band survey with a 5 sigma total galaxy magnitude limit of K
Apr 3, 2006 ... This image, obtained with the SPI instrument on the INTEGRAL observatory, shows emission from anti-matter in the Galaxy - in particular it ...
Nov 5, 2010 ... The colliding galaxies have been nicknamed "the Mice" because of the long tails of stars and gas emanating from each galaxy. ...
Continuum observations at 350 micrometers of seven nearby elliptical galaxies for which CO gas disks
Mar 1, 2005 ... Invisible Galaxies Come to Life! (Artist Concept) .... Fire in Haifu, Israel Added December 17, 2010. Rate this: ...
Jan 10, 2008 ... Observations from NASA's Spitzer Space Telescope provide strong evidence that the slender, bulgeless galaxies can, like their chubbier ...
NASA's Galaxy Evolution Explorer Mission celebrates its sixth anniversary .... cloud in our Milky Way galaxy, also known as the Running Chicken nebula. ...
Chasing Chickens in the Lambda Centauri Nebula .... NASA's Galaxy Evolution Explorer Mission celebrates its sixth anniversary studying galaxies beyond our ...
Chasing Chickens in the Lambda Centauri Nebula ..... NASA's Galaxy Evolution Explorer Mission celebrates its sixth anniversary studying galaxies beyond our ...
Mission: Galaxy Evolution Explorer (GALEX), Spitzer Space Telescope .... cloud in our Milky Way galaxy, also known as the Running Chicken nebula. ...
NASA's Galaxy Evolution Explorer is helping to identify young, ..... a star- forming cloud in our Milky Way galaxy, also known as the Running Chicken nebula. ...
New results from NASA's Galaxy Evolution Explorer and the Anglo-Australian Telescope atop Siding Spring Mountain in Australia confirm that dark energy is a ...
Anomalous Arms. This composite image is of spiral galaxy M106 (NGC 4258); optical data ..... The magnificent spiral arms of the nearby galaxy Messier 81 are ...
... Accession Number : ADA436022. Title : Proper Motions of Dwarf Spheroidal Galaxies from Hubble Space Telescope Imaging: III. ...
Jan 13, 2011 ... These images by NASA's Hubble Space Telescope show off two dramatically different views of the spiral galaxy M51, dubbed the Whirlpool ...
Feb 5, 2008 ... This image of the elliptical galaxy NGC 1132 and its surrounding region combines data from NASA's Chandra X-ray Observatory and the Hubble ...
View annotated image � More information - ESA's Hubble site PASADENA, Calif. -- Astronomers have uncovered one of the youngest galaxies in the distant universe, with stars...
This false-color infrared image from NASA's Spitzer Space Telescope shows little 'dwarf galaxies. Dwarf Galaxies Swimming in Tidal Tails ...
Mar 13, 2009 ... This sharp Hubble image shows one such galaxy group, HCG 90, in startling detail . Three galaxies are revealed to be strongly interacting: a ...
Mar 16, 2009 ... A new image from Spitzer offers a rare view of an imminent collision between the cores of two galaxies, each powered by a black hole with ...
Like humans, stars and galaxies have a life cycle. They are born ... JPL manages several missions for NASA that are looking to the stars. ... View Larger Image ...
Aug 26, 2011 ... These galaxies have fluffy spiral arms that contrast with the sweeping arms of grand-design spirals such as the famous Whirlpool galaxy or ...
These galaxies have fluffy spiral arms that contrast with the sweeping arms of grand-design spirals such as the famous Whirlpool galaxy or M 51, ...
been removed, revealing the Whirlpool s skeletal dust structure. This new image is ... Whirlpool Galaxy, as if they were swirling toward the galaxy's core ...
PIA13454: WISE Beholds a Pair of Dancing Galaxies This image from NASA's Wide-Field Infrared Explorer features two stunning galaxies engaged in an intergalactic dance. The...
Sep 20, 2007 ... Galaxy ESO 137-001. This composite image of X-ray and optical light shows a tail that has been created as a galaxy plunges into a cluster, ...
