Mathematics – Logic
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993hst..prop.4342l&link_type=abstract
HST Proposal ID #4342
Mathematics
Logic
Hst Proposal Id #4342
Scientific paper
We will obtain intermediate-resolution spectroscopy of low- and intermediate-redshift (0.05 < z < 1.6) candidate damped Lyman-alpha absorption features that were detected toward higher-redshift background QSOs in an exhaustive search of the IUE archival data base. This search forms a systematic, unbiased survey for low- and intermediate-redshift galaxy disks. Accurate spectra of the candidate features will allow us to confirm (or otherwise) the damped nature of the absorption profiles and to determine the H I column densities. By combining the results of this effort with those derived from existing optical surveys we will determine the redshift evolution of the rate of incidence, cosmological mass density, and column density distribution of the damped Lyman-alpha absorbers over a redshift baseline spanning 0.05 < z < 4.0. We will furthermore secure a sample of low- and intermediate-redshift damped Lyman-alpha absorbers for further detailed study. These results will constrain theories of galaxy formation and evolution and will help to determine the type or types of galaxies responsible for the absorption.
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