Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005pgqa.conf..460o&link_type=abstract
Probing Galaxies through Quasar Absorption Lines, IAU Colloquium Proceedings of the International Astronomical Union 199, held M
Astronomy and Astrophysics
Astronomy
Scientific paper
We investigate the evolution of damped Lyα absorption systems (dla) from hierarchical structure formation models by exploring the basic properties of DLA host-galaxies (dla galaxies) to clarify the connection between DLAs and galaxies. We find that DLA galaxies primarily consist of low surface brightness dwarf galaxies. For example, at redshift z ≤ 1, DLA galaxies have typical radius 3 kpc, surface brightness 22-27 mag arc-sec-2, and star formation rate 10-2 M&sun;/yr. We discuss selection effects in the detection in emission caused by compactness and brightness. Finally, we explore the radio properties at z=0 by comparing the observational results from blind radio surveys.
Nagashima Masahiro
Okoshi Katsuya
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