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Connecting high-redshift galaxy populations through observations of local Damped Lyman Alpha dwarf galaxies

Published online by Cambridge University Press:  01 June 2008

Regina E. Schulte-Ladbeck
Regina E. Schulte-Ladbeck*
Affiliation:
Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA email: rsl@pitt.edu
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Abstract

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I report on observations of the z=t 0.01 dwarf galaxy SBS1543+593 which is projected onto the background QSO HS1543+5921. As a star-forming galaxy first noted in emission, this dwarf is playing a pivotal role in our understanding of high-redshift galaxy populations, because it also gives rise to a Damped Lyman Alpha system. This enabled us to analyze, for the first time, the chemical abundance of α elements in a Damped Lyman Alpha galaxy using both, emission and absorption diagnostics. We find that the abundances agree with one another within the observational uncertainties. I discuss the implications of this result for the interpretation of high-redshift galaxy observations. A catalog of dwarf-galaxy–QSO projections culled from the Sloan Digital Sky Survey is provided to stimulate future work.

Keywords

line: formationmethods: data analysistechniques: spectroscopicgalaxies: ISMgalaxies: abundancesgalaxies: dwarfgalaxies: starburstquasars: absorption lines
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Issue S255: Low-Metallicity Star Formation: From the First Stars to Dwarf Galaxies , June 2008 , pp. 129 - 133
Copyright
Copyright © International Astronomical Union 2008

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