Aegis: a Panchromatic Study of Irac-selected Extremely Red Objects with Confirmed Spectroscopic Redshifts
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چکیده
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. Subject headings: galaxies: evolution — galaxies: high-redshift — infrared: galaxies— galaxies: elliptical and lenticular, cD — galaxies: starburst
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تاریخ انتشار 2008