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AEGIS: A Panchromatic Study of IRAC-selected Extremely Red Objects with Confirmed Spectroscopic Redshifts

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arxiv astro-ph/0608447 v1 pith:4RJLAFK6 submitted 2006-08-21 astro-ph

G. Wilson , J. S. Huang , G. G. Fazio , R. Yan , A. M. Koekemoer , S. Salim , S. M. Faber , J. Lotz
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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
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classification astro-ph
keywords colorcameraconfirmederosextremelyiracobjectsredshifts
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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 into early-type, dusty starburst, or power-law (AGN) 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.

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