Imaging and Spectroscopy of Galaxies Associated with Twoz~0.7 Damped Ly Absorption Systems | Zendy

Mark Lacy | Zendy; R. H. Becker | Zendy; Lisa J. StorrieLombardi | Zendy; Michael D. Gregg | Zendy; T. Urrutia | Zendy; R. L. White | Zendy

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Imaging and Spectroscopy of Galaxies Associated with Twoz~0.7 Damped Ly Absorption Systems

Author(s) -

Mark Lacy,

R. H. Becker,

Lisa J. StorrieLombardi,

Michael D. Gregg,

T. Urrutia,

R. L. White

Publication year - 2003

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/378957

Subject(s) - physics , astrophysics , quasar , galaxy , redshift , luminosity function , luminosity , luminous infrared galaxy , population , astronomy , medicine , environmental health

We have identified galaxies near two quasars which are at the redshift ofdamped Lyman-alpha (DLA) systems in the UV spectra of the quasars. Bothgalaxies are actively forming stars. One galaxy has a luminosity close to thebreak in the local galaxy luminosity function, L*, the other is significantlyfainter than L* and appears to be interacting with a nearby companion. Despitethe strong selection effects favoring spectroscopic identification of the mostluminous DLA galaxies, many of the spectroscopically-identified DLA galaxies inthe literature are sub-L*, suggesting that the majority of the DLA populationis probably sub-L*, in contrast to MgII absorbers at similar redshifts whosemean luminosity is close to L*.Comment: 9 pages, to appear in AJ, November 2003 issu

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