The Contribution of HI-rich Galaxies to the Damped Lyman-alpha Absorber Population at z=0

Details The Contribution of HI-rich Galaxies to the Damped Lyman-alpha Absorber Population at z=0 The Contribution of HI-rich Galaxies to the Damped Lyman-alpha Absorber Population at z=0

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003assl..281...41r&link_type=abstract

The IGM/Galaxy Connection: The Distribution of Baryons at z=0, ASSL Conference Proceedings Vol. 281. Edited by Jessica L. Rosenb

Physics

Scientific paper

We present a study of the expected properties of the low redshift damped Lyman-alpha absorber population determined from a sample of HI-selected galaxies in the local universe. Because of a tight correlation between the HI mass and HI cross-section, which spans all galaxy types, we can use our HI-selected sample to predict the properties of the absorption line systems. We find that the dN/dz distribution is dominated by galaxies with HI masses near 109 Msun. However, because of the large dispersion in the correlation between HI mass and stellar luminosity, we find that the distribution of dN/dz as a function of LJ is fairly flat.

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