Wilson, G. and Huang, J.-S. and Fazio, G. G. and Yan, R. and Koekemoer, A. M. and Salim, S. and Faber, S. M. and Lotz, J. and Willmer, C. N. A. and Davis, M. and Coil, A. L. and Newman, J. A. and Conselice, C. J. and Papovich, C. and Ashby, M. L. N. and Barmby, P. and Willner, S. P. and Ivison, R. and Miyazaki, S. and Rigopoulou, D. (2007) AEGIS: A Panchromatic Study of IRAC-selected Extremely Red Objects with Confirmed Spectroscopic Redshifts. Astrophysical Journal Letters, 660 (1). L59-L63. ISSN 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:20091118-105541677
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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.
|Additional Information:||© 2007 American Astronomical Society. Print publication: Issue 1 (2007 May 1); received 2006 May 25; accepted for publication 2006 August 15; published 2007 April 6. This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech. A. L. C. is supported by NASA through Hubble Fellowship grant HF- 01182.01-A. We thank the referee, Matt Malkan, for constructive comments. G. W. thanks Mark Lacy, Adam Muzzin, Jason Surace, Ian Smail, and Mike Hudson for useful discussions, and UC Berkeley and UC Santa Cruz for their hospitality.|
|Subject Keywords:||galaxies: elliptical and lenticular, cD; galaxies: evolution; galaxies: high-redshift; galaxies: starburst; infrared: galaxies|
|Official Citation:||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, and D. Rigopoulou 2007 ApJ 660 L59-L63 doi: 10.1086/517923|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||25 Nov 2009 20:17|
|Last Modified:||26 Dec 2012 11:34|
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