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

Abstract

Using the multiwavelength photometric and spectroscopic data covering the Chandra Deep Field South obtained within the Great Observatories Origins Deep Survey, 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 2800Å characteristic magnitude (M) over the redshift range 0.3 < ∼ z < ∼ 1.7 and no evolution at higher redshifts. The rest-frame 2800Å luminosity density shows an increase by a factor ∼ 4 over the redshift range investigated. We estimate the star formation rate density to z ∼2.2 from the 1500Å and 2800Å luminosities. When no correction for extinction is made, we find that the star formation rate derived from the 2800Å luminosity density is almost factor two higher than that derived from the 1500Å luminosities. Attributing this difference to differential dust extinction, we find that an E(B–V)=0.20 results in the same extinction corrected star formation rate from both 1500Å and 2800Å luminosities. The extinction corrected SFR is a factor ∼ 6.5 (∼ 3.7) Department of Physics, Stockholm University, SE-10961, Stockholm, Sweden; dahlen@physto.se Space Telescope Science Institute, Baltimore, MD 21218; mobasher@stsci.edu, ferguson@stsci.edu, mauro@stsci.edu Affiliated with the Space Telescope Division of the European Space Agency, ESTEC, Noordwijk, Netherlands. National Optical Astronomy Observatory, P.O. Box 26732, Tucson, AZ 85726; med@noao.edu. Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218; claudia@pha.jhu.edu Inter-University Center for Astronomy & Astrophysics, Post Bag 4, Ganeshkhind, Pune, India 411007; swara@iucaa.ernet.in

15 Figures and Tables

Cite this paper

@inproceedings{Dahln2006EvolutionOT, title={Evolution of the Luminosity Function, Star Formation Rate, Morphology and Size of Star-forming Galaxies Selected at Rest-frame 1500Å and 2800Å}, author={Tomas Dahl{\'e}n and Bahram Mobasher and Mark E. Dickinson and Henry C. Ferguson and Mauro Giavalisco and Claudia Kretchmer}, year={2006} }