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arXiv · astro-ph/9605154

Identification of a Galaxy Responsible for a High-Redshift Damped Ly-alpha Absorption System

S. G. Djorgovski·M. A. Pahre·J. Bechtold·R. Elston
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Abstract

Galaxies believed to be responsible for damped Ly-alpha absorption (DLA) systems in the spectra of high-redshift quasars represent a viable population of progenitors of normal disk galaxies. They appear to contain a substantial fraction of the baryons known to exist in normal galaxies today. Here we report on the detection of an object, designated DLA 2233+131, responsible for a previously known DLA system at z(abs)=3.150 in the spectrum of a quasar 2233+131 [z(QSO)=3.295]. This is the first unambiguous detection of a DLA galaxy, in both emission line and stellar continuum. Its properties correspond closely to what may be expected from a young disk galaxy in the early stages of formation, with no sign of an active nucleus. This gives a strong support to the idea that DLA systems represent a population of young galaxies at high redshifts.

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S. G. Djorgovski, M. A. Pahre, J. Bechtold, R. Elston. 1996-05-24. Identification of a Galaxy Responsible for a High-Redshift Damped Ly-alpha Absorption System. https://doi.org/10.1038/382234a0

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