%0 Journal Article
%T GALEX selected Lyman Break Galaxies at z~2: Comparison with other Populations
%A L. Haberzettl
%A G. M. Williger
%A M. D. Lehnert
%A N. P. H. Nesvadba
%A L. J. M. Davies
%J Physics
%D 2011
%I arXiv
%R 10.1088/0004-637X/745/1/96
%X We present results of a search for bright Lyman break galaxies at 1.5<=z<=2.5 in the GOODS-S field using a NUV-dropout technique in combination with color-selection. We derived a sample of 73 LBG candidates. We compare our selection efficiencies to BM/BX- and BzK methods (techniques solely based on ground-based data sets), and find the NUV data to provide greater efficiency for selecting star-forming galaxies. We estimate LBG candidate ages, masses, star formation rates, and extinction from fitting PEGASE synthesis evolution models. We find about 20% of our LBG candidates are comparable to infrared luminous LBGs or sub-millimeter galaxies which are thought to be precursors of massive elliptical galaxies today. Overall, we can show that although BM/BX and BzK methods do identify star-forming galaxies at z~2, the sample they provide biases against those star-forming galaxies which are more massive and contain sizeable red stellar populations. A true Lyman break criterion at z~2 is therefore more directly comparable to the populations found at z~3, which does contain a red fraction.
%U http://arxiv.org/abs/1112.2786v1