AEGIS: A panchromatic study of IRAC-selected extremely red objects with confirmed spectroscopic redshifts

G. Wilson, J. S. Huang, G. G. Fazio, R. Yan, A. M. Koekemoer, S. Salim, S. M. Faber, J. Lotz, C. N.A. Willmer, M. Davis, A. L. Coil, J. A. Newman, C. J. Conselice, C. Papovich, M. L.N. Ashby, P. Barmby, S. P. Willner, R. Ivison, S. Miyazaki, D. Rigopoulou

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

We study 87 extremely red objects (EROs), selected both to have color redder than R - [3.6] = 4.0 and to have confirmed spectroscopic redshifts. Together, these two constraints result in this sample populating a fairly narrow redshift range at 0.76 < z < 1.42. The key new ingredient included here is deep Spitzer Space Telescope Infrared Array Camera (IRAC) data. Based on [3.6] - [8.0] color, we demonstrate that it is possible to classify EROs as early-type galaxies, dusty starburst galaxies, or active galactic nuclei (AGNs; power-law types). We present ultraviolet-to-mid-infrared spectral energy distributions (SEDs) and Advanced Camera for Surveys (ACS) images, both of which support our simple IRAC color classification.

Original languageEnglish
Pages (from-to)L59-L63
JournalAstrophysical Journal
Volume660
Issue number1 II
DOIs
StatePublished - May 1 2007

Keywords

  • Galaxies: elliptical and lenticular, cD
  • Galaxies: evolution
  • Galaxies: high-redshift
  • Galaxies: starburst
  • Infrared: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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