Chemical Abundances in SFG and DLA

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dc.creatorSchulte-Ladbeck, Regina E.
dc.creatorKönig, Brigitte
dc.creatorCherinka, Brian
dc.date2005-04-18
dc.date2005-04-22
dc.date.accessioned2026-07-07T02:17:29Z
dc.date.available2026-07-07T02:17:29Z
dc.descriptionWe investigate the chemical abundances of local star-forming galaxies which cause Damped Lyman Alpha lines. A metallicity versus redshift diagram is constructed, on which the chemical abundances of low-redshift star-forming galaxy populations are compared with those of high-redshift Damped Lyman Alpha systems. We disucss two types of experiments on individual star-forming galaxies. In the first, the Damped Lyman Alpha line is created against an internal ultraviolet light source generated by a star-forming cluster or a supernova explosion. In the second, the Damped Lyman Alpha line is seen against a background Quasar. The metallicities measured from ionized gas in the star-forming regions, and neutral gas in the Damped Lyman Alpha systems, are compared with one another on a case-by-case basis. We highlight the occurrence of the star-forming galaxy/Quasar pair SBS 1543+593/HS 1543+5921, where the emission- and absorption-line derived abundances give the same result. We argue that we therefore can in principle, interpret Damped Lyman Alpha system metallicities as an extension of star-forming galaxy metallicities to higher redshifts, supporting that gas-rich galaxies had lower chemical abundances when the were younger.
dc.description6 pages, 3 figures, conference proceedings IAU 199
dc.identifierhttps://arxiv.org/abs/astro-ph/0504389
dc.identifierhttp://arxiv.org/abs/astro-ph/0504389
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/9188
dc.subjectAstrophysics
dc.titleChemical Abundances in SFG and DLA
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