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Rest-frame UV--Optically Selected Galaxies at 2.3
The Astrophysical Journal (2011)
  • Yicheng Guo
  • Mauro Giavalisco, University of Massachusetts - Amherst
  • Paolo Cassata
  • Henry C. Ferguson
  • Christina C. Williams
  • Mark Dickinson
  • Anton Koekemoer
  • Norman A. Grogin
  • Ranga-Ram Chary
  • Hugo Messias
  • Elena Tundo
  • Lihwai Lin
  • Seong-Kook Lee
  • Adriano Fontana
  • Andrea Grazian
  • Dale Kocevski
  • Kyoung-Soo Lee
  • Edward Villanueva
  • Arjen van der Wel
A new set of color selection criteria (VJL) analogous with the BzK method is designed to select both star-forming galaxies (SFGs) and passively-evolving galaxies (PEGs) at 2.310^{10}M_{Sun}) galaxies at 2.30.4) SFGs, which however, only account for ~20% of the number density of massive SFGs. We also use the mid-infrared fluxes to clean our PEG sample, and find that galaxy size can be used as a secondary criterion to effectively eliminate the contamination of dusty SFGs. The redshift distribution of the cleaned PEG sample peaks at z~2.5. We find 6 PEG candidates at z>3 and discuss possible methods to distinguish them from dusty contamination. We conclude that at least part of our candidates are real PEGs at z~3, implying that this type of galaxies began to form their stars at z>5. We measure the integrated stellar mass density of PEGs at z~2.5 and set constraints on it at z>3. We find that the integrated stellar mass density grows by at least about factor of 10 in 1 Gyr at 3
  • Cosmology: observations,
  • Galaxies: evolution,
  • Galaxies: formation,
  • Galaxies: fundamental parameters,
  • Galaxies: general,
  • Galaxies: high-redshift,
  • Infrared: galaxies
Publication Date
Publisher Statement
This paper was harvested from and ArXiv identifier is arXiv:1110.3801
Citation Information
Yicheng Guo, Mauro Giavalisco, Paolo Cassata, Henry C. Ferguson, et al.. "Rest-frame UV--Optically Selected Galaxies at 2.3" The Astrophysical Journal (2011)
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