[80.18] Near-Infrared Properties of AGN in the MUSYC Survey

AAS 207th Meeting, 8-12 January 2006
Session 80 Evolution of Galaxies, Galaxies Surveys II
Poster, Tuesday, 9:20am-6:30pm, January 10, 2006, Exhibit Hall

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[80.18] Near-Infrared Properties of AGN in the MUSYC Survey

J. Van Duyne, C. M. Urry, S. Virani (Yale), E. Treister (Yale, U. de Chile), E. Taylor (Leiden), E. Gawiser, P. van Dokkum (Yale), MUSYC Collaboration

We present the near-infrared properties of AGN in the MUltiwavelength Survey by Yale-Chile (MUSYC), four fields of roughly a quarter square degree each with extensive ground-based and space-based imaging data and spectroscopic follow-up. Three MUSYC fields have J- and K-band coverage, to at least J~23 and K~22 (AB). Five 10'x10' sub-fields have deeper coverage, to J~24 and K~ 23 (AB) as well as H-band coverage. The deepest X-ray coverage is in the Extended Chandra Deep Field South (ECDFS), where there are deep Chandra and XMM data, and there are additional Chandra and XMM X-ray data in the SDSS1030+05 field. Here we describe the near-infrared properties of X-ray sources in each field, a majority having L_X > 10⁴² ergs/s, which are almost certainly AGN rather than starbursts. In the K-band imaging, which overlaps 90% of the ECDFS, 76% of the AGN have unique near-infrared counterparts, 23% have no apparent counterpart, and 1% are confused or have multiple counterparts. This is a slighty higher percentage than in the optical, where more of the AGN are blank fields. We investigate the infrared color properties and X-ray/IR flux ratios of these AGN, including the small fraction of massive galaxies and red merging galaxies with X-ray detections. With additional Spitzer coverage, we also investigate the dust properties of these AGN candidates and the relative contributions of host galaxy light and AGN continuum in the near-infrared.

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