A spectroscopic study of damped Lyman-alpha systems in the Las Campanas/Palomar survey

1993 ◽  
Vol 84 ◽  
pp. 1 ◽  
Author(s):  
Limin Lu ◽  
Arthur M. Wolfe ◽  
David A. Turnshek ◽  
Kenneth M. Lanzetta
Keyword(s):  
Spectroscopic Study ◽  
Lyman Alpha ◽  
Damped Lyman Alpha Systems

Near-Infrared Integral Field Spectroscopy of Damped Lyman- $\alpha$ Systems

2006 ◽  
pp. 330-333
Author(s):  
Andrew Bunker ◽  
Annette Ferguson ◽  
Rachel Johnson ◽  
Richard McMahon ◽  
Ian Parry ◽  
...  
Keyword(s):  
Near Infrared ◽  
Lyman Alpha ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Damped Lyman Alpha Systems ◽  
Integral Field

KINEMATIC PROPERTIES OF DAMPED LYMAN ALPHA SYSTEMS

2006 ◽  
Vol 15 (03) ◽  
pp. 371-386
Author(s):  
SNIGDHA DAS ◽  
PUSHPA KHARE
Keyword(s):  
Statistical Tests ◽  
Random Motion ◽  
Model Parameters ◽  
Galactic Halos ◽  
Dark Matter Halos ◽  
Lyman Alpha ◽  
The Press ◽  
Damped Lyman Alpha Systems ◽  
The Universe ◽  
Kinematic Properties

In a previous paper, we determined the statistical distributions for various classes of QSO absorption systems in the framework of the CDM model of the universe with a mass distribution of dark matter halos as given by the Press Schechter mechanism. These were shown to be consistent with the observed distributions for reasonable choices of model parameters. In this paper, we generate Voigt profiles of C IV lines associated with Damped Lyman Alpha systems in the framework of this model, taking into account rotation of disks and random motion of clouds embedded in galactic halos. We compare these with the profiles for a sample of 32 Damped Lyman Alpha systems collected from the literature by performing several statistical tests. These tests compare the width and the degree of asymmetry in the line profiles produced by the rotation of randomly inclined disks and the random velocity of clouds in the galactic halos, with the corresponding quantities in the observed profiles. We find that the kinematic properties predicted by the model are in good agreement with observations provided the disk thickness is about ten thousand times smaller than its radius, which indicates that the material in the disks is concentrated in dense clouds with roughly unit covering factor.

scholarly journals [C ii] 158-μm emission from the host galaxies of damped Lyman-alpha systems

Science ◽  
2017 ◽  
Vol 355 (6331) ◽  
pp. 1285-1288 ◽  
Author(s):  
Marcel Neeleman ◽  
Nissim Kanekar ◽  
J. Xavier Prochaska ◽  
Marc Rafelski ◽  
Chris L. Carilli ◽  
...  
Keyword(s):  
Host Galaxies ◽  
Lyman Alpha ◽  
Damped Lyman Alpha Systems

scholarly journals A spectroscopic study of UM 673 A and B - On the size of Lyman-alpha clouds

1992 ◽  
Vol 389 ◽  
pp. 39 ◽  
Author(s):  
A. Smette ◽  
J. Surdej ◽  
P. A. Shaver ◽  
C. B. Foltz ◽  
F. H. Chaffee ◽  
...  
Keyword(s):  
Spectroscopic Study ◽  
Lyman Alpha
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