Apr 27, 2009 ... The Sloan Digital Sky Survey (SDSS) Broad Absorption Line (BAL) Quasars Catalog (based on the 3rd SDSS Data Release) contains a total of ...

The spectra of the Sloan Digital Sky Survey (SDSS) are being used to construct a catalogue of QSO absorption lines, for use in studies of abundances, relevant radiation fields, number counts as a function of redshift, and other matters, including the evolution of these parameters. The catalogue includes intervening, associated, and BAL ...

Analysis of the spacing between absorption-line systems in quasar spectra and comparison against deep optical survey data for the separation between superclusters of galaxies indicates that the absorption originates in the superclusters. Supported by analogous data on the absorbing gas in the galactic and Magellanic Cloud halos, this ...

The Quasar Absorption Line Survey of bright sources is an efficient observing program designed to provide a homogeneous data base of absorption features. The data will reveal absorption regions in galaxies, in clusters of galaxies, in voids, in large-scale structures, in Lyman ALPHA clouds, and ...

The Quasar Absorption Line Survey of bright sources is an efficient observing program designed to provide a homogeneous data base of absorption features. The data will reveal absorption regions in galaxies, in clusters of galaxies, in voids, in large-scale structures, in Lyman ALPHA clouds, and ...

PART 3 consists of replacement targets for objects pulled from the original submission because targets had been previously observed in other programs. The Absorption Line Survey of bright quasars provides a homogeneous data base for studying fundamental questions about the origin and evolution of gaseous systems in the universe. The ...

PART 2 consists of replacement targets for objects pulled from the original submission because targets had been previously observed in other programs. The Absorption Line Survey of bright quasars provides a homogeneous data base for studying fundamental questions about the origin and evolution of gaseous systems in the universe. The ...

This file contains observations that are part of supplemental time cycle 3 allocation. This allocation is for 25 hours of spacecraft time. The Absorption Line Survey of bright quasars provides a homogeneous data base for studying fundamental questions about the origin and evolution of gaseous systems in the universe. The initial ...

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 ...

We have established a new database of absorption and emission line measurements from the Sloan Digital Sky Survey 7th data release for the galaxies within a redshift of 0.2. This work used publicly available codes, pPXF(penalized pixel-fitting) and GANDALF(gas and absorption line fitting), to ...

Quasar absorption lines in flat universes with nonzero cosmological constant Lambda are examined and

... Accession Number : AD0619963. Title : INVESTIGATION OF NARROW LINE ABSORPTIONS IN SINGLE CRYSTAL CALCITE. ...

... Title : ABSORPTION LINE SERIES AND AUTOIONIZATION RESONANCE STRUCTURE ANALYSIS IN THE ULTRAVIOLET SPECTRUM OF SR I,. ...

We present the first results from the Complete Optical and Radio Absorption Line System (CORALS) survey for Damped Lyman Alpha (DLA) systems based on a radio-selected sample of quasars. We find that the number density and neutral gas content of CORALS DLAs is in good agreement with previous surveys. These results ...

Nov 1, 1977 ... This atlas of infrared absorption line contains absorption line parameters (line strength vs.

We present a brief overview of the ongoing Complete Optical and Radio Absorption Line System (CORALS) survey. We review the results of our survey for z>2.2 damped Lyman alpha systems (DLAs) and present the preliminary results of an extended survey to lower redshifts (0.7

Studies of QSO absorption lines can be used to discover superclusters of metal-line systems (thought to be associated with galaxies) at large redshift, analogous to the absorbers found in the field surrounding the southern pair Tol 1037/1038. The unique ability of QSO absorption lines to reveal ...

Studies of QSO absorption lines can be used to discover 'superclusters' of metal-line systems (thought to be associated with galaxies) at large redshift, analogous to the absorbers found in the field surrounding the southern pair Tol 1037/1038. The unique ability of QSO absorption lines to ...

The optical absorption lines of quasars are examined, and implications of the lines for the physical

A survey of the CO2 spectrum contained in the HI-. TRAN96 database [6] yielded potential candidate lines in .... struments whose data is analogous to what will be required ... sive microwave radiometer that measures the natural thermal ...

The spectra were collected with the LRIS on the Keck II Telescope, which has a 7.7arcmin long slit. We selected galaxies from Palomar Observatory Sky Survey prints of the centre of the Coma cluster. (2 data files).

The only unbiased molecular line survey of an extragalactic source published so far is the 2 mm survey toward NGC 253 (Martin et al. 2006). Here we propose to measure the nearby FR I radio galaxy Cen A with the MOPRA/MOPS system in the 3-4 mm wavelength range (79-115 GHz) and at K-band (20-28 GHz). This will elucidate chemistry, ...

quasar's broad emission lines. The reddest extent of the broad-line absorption .... lines from the quasar and the low signal-to-noise ...

The two phase project involved the development and field validation of an optimal process control system for lean oil absorption/desorption gas processing plants. Phase 1 consisted of a field survey and software module development activity for the control...

Observing the HI Ly? line in absorption and emission with deep spectroscopic surveys we can study dwarf galaxies at high redshift. We describe how these observations tell us about typical (i.e., low mass, faint) star-forming galaxies, and how the various observational manifestations, damped Ly? systems, faint Ly? emitters, and ...

... Descriptors : (*VAPOR PRESSURE, RESONANCE ABSORPTION), (*COPPER, LINE SPECTRA), ABSORPTION SPECTRA, SPECTROSCOPY ...

... Title : Calculation of Molecular Absorption Parameters and Updating the AFGL atmospheric Line Parameter Compilation. ...

... Title : Resonance Line Absorption Method for Determination of Nitric Oxide Concentration. Descriptive Note : Final rept.,. ...

Dec 18, 1998 ... Absorption lines are discrete colors of light that are absorbed by intervening matter; this absorption leaves holes or "lines" in the ...

In the ultraviolet spectra of hot stars, absorption lines can be seen from highly ionized species in

In the ultraviolet spectra of hot stars, absorption lines can be seen from highly ionized species in

The strongest and generally most useful optical interstellar absorption lines include the D lines of

Results are presented for a spectroscopic survey of an intermediate (1.20z/sub em/ have velocity dispersion very similar to that expected if the absorbing material and the QSO are members of clusters of galaxies, and we interpret systems with vertical-bar z/sub em/-z/sub abs/ vertical-bar< or approx. =3000 km s/sup -1/ as predominantly associated with galaxy clusters. The ...

The Sloan Digital Sky Survey has discovered a population of broad absorption line quasars with various extreme properties. Many show absorption from metastable states of Fe II with varying excitations; several objects are almost completely absorbed bluewards of Mg II; at least one shows stronger ...

We perform a systematic study of physical properties and distribution of neutral and ionised gas in the halo of the Milky Way (MW). Beside the large neutral intermediate- and high-velocity cloud (IVC, HVC) complexes there exists a population of partly ionised gaseous structures with low column densities that have a substantial area filling factor. The origin and nature of these structures are ...

The discovery of the second quasar with a redshift greater than 4 is reported. This object, which has an r magnitude of 21.0, was detected on a CCD grism survey. The spectrum of the quasar has strong, relatively narrow (but resolved) emission lines; there is a deep absorption trough about 100 A wide on the blue wing of the Lyman-alpha ...

An upper limit to the atmospheric acetonitrile mixing ratio of 3.2 times 10 to the minus 11th power is deduced from the high resolution Kitt Peak infrared atlas of the solar spectrum. The survey of the spectral region of CH3CN main absorption shows only stratospheric ozone lines and 1 water vapor line and does not ...

The APM multicolor survey for bright z > 4 objects, covering 2500 deg^2^ of sky to m_r_ ~ 19, resulted in the discovery of 31 quasars with z ~> 4. High signal-to-noise optical spectrophotometry at 5 A resolution has been obtained for the 28 quasars easily accessible from the northern hemisphere. These spectra have been surveyed to create new samples ...

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 ...