Journal
ASTROPHYSICAL JOURNAL
Volume 745, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/745/1/96
Keywords
galaxies: evolution; galaxies: general; galaxies: high; redshift; galaxies: star formation; infrared: galaxies
Categories
Funding
- NASA
- STFC [ST/J001414/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J001414/1] Funding Source: researchfish
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We present results of a search for bright Lyman break galaxies (LBGs) at 1.5 <= z <= 2.5 in the GOODS-S field using an 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 that about 20% of our LBG candidates are comparable to infrared-luminous LBGs or submillimeter 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 similar to 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 similar to 2 is therefore more directly comparable to the populations found at z similar to 3, which does contain a red fraction.
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