Mid-infrared Selection Of AGN With WISE

Details Mid-infrared Selection Of AGN With WISE Mid-infrared Selection Of AGN With WISE

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21924313s&link_type=abstract

American Astronomical Society, AAS Meeting #219, #243.13

Computer Science

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Scientific paper

The Wide-field Infrared Survey Explorer (WISE) is an extremely capable and efficient black hole finder. We present a simple mid-infrared color criterion, W1-W2 > 0.8, which identifies 60 AGN candidates per square-degree. This implies a much larger census of luminous AGN than found by typical wide-area optical surveys, attributable to the fact that mid-infrared selection identifies both unobscured (type 1) and obscured (type 2) AGN. Optical and soft X-ray surveys alone are highly biased towards only unobscured AGN, while this simple WISE selection likely identifies even heavily obscured, Compton-thick AGN. Using deep, public data in the COSMOS field, we explore the properties of WISE-selected AGN candidates. At the mid-infrared depths considered, 70 uJy at 3.4 microns and 160 uJy at 4.6 microns, this simple criterion identifies 78% of mid-infrared AGN candidates according to the criteria of Stern et al. (2005) with 95% reliability. We report on the demographics, multi-wavelength properties and redshift distribution of WISE-selected AGN candidates in the COSMOS field.

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