NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-24 T18:42:40 PDT
Help | Comment | NED Home

For refcode 2003ApJ...585..256R:
Retrieve 135 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2003ApJ...585..256R The Contribution of H I-rich Galaxies to the Damped Ly{alpha} Absorber Population at z = 0 Jessica L. Rosenberg and Stephen E. Schneider Received 2002 February 4; accepted 2002 November 6 ABSTRACT We present a study of the expected properties of the low-redshift damped Ly {alpha} absorber population determined from a sample of H I-selected galaxies in the local universe. Because of a tight correlation between the H I mass and H I cross section, which we demonstrate spans all galaxy types, we can use our H I-selected sample to predict the properties of the absorption-line systems. We use measurements of the number density and H I cross section of galaxies to show that the total H I cross section at column densities sufficient to produce damped Ly{alpha} absorption is consistent with no evolution of the absorber population. We also find that the dN/dz distribution is dominated by galaxies with H I masses near 109 M_sun_. However, because of the large dispersion in the correlation between H I mass and stellar luminosity, we find that the distribution of dN/dz as a function of L_J_ is fairly flat. In addition, we examine the line widths of the H I-selected galaxies and show that there may be evolution in the kinematics of H I-rich galaxies, but it is not necessary for the higher redshift population to contain a greater proportion of high-mass galaxies than we find locally. Subject headings: galaxies: ISM - quasars: absorption lines - radio lines: galaxies
Retrieve 135 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home