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Evolution of the Luminosity Function, Star Formation Rate, Morphology and Size of Star-forming Galaxies Selected at Rest-frame 1500A and 2800A

Tomas Dahlen·Bahram Mobasher·Mark Dickinson·Henry C. Ferguson·Mauro Giavalisco·Claudia Kretchmer·Swara Ravindranath
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Abstract

Using the multiwavelength photometric and spectroscopic data covering the CDF-S obtained within the GOODS, we investigate the rest-frame UV properties of galaxies to z~2.2, including the evolution of the luminosity function, the luminosity density, star formation rate (SFR) and galaxy morphology. We find a significant brightening (~ 1 mag) in the rest-frame 2800A characteristic magnitude (M*) over the redshift range 0.3 2.5) increases from ~10% at z~0.5 to ~30% at z~2.2. At the same time, we note that galaxies get bluer at increasing redshift. This suggests a scenario where an increased fraction of the star formation takes place in bulge-dominated systems at high redshift. This could be the evidence that the present day ellipticals are a result of assembly (i.e., mergers) of galaxies at z>1. Finally, we find that galaxy sizes for a luminosity selected sample evolves as (1+z)^{-1.1} between redshifts z=2.2 and z=1.1. This is consistent with previous measurements and suggests a similar evolution over the redshift range 0 < z < 6.

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Tomas Dahlen, Bahram Mobasher, Mark Dickinson, Henry C. Ferguson, Mauro Giavalisco, Claudia Kretchmer, Swara Ravindranath. 2006-09-01. Evolution of the Luminosity Function, Star Formation Rate, Morphology and Size of Star-forming Galaxies Selected at Rest-frame 1500A and 2800A. https://doi.org/10.1086/508854

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