Статья

MID-INFRARED SELECTION OF ACTIVE GALACTIC NUCLEI WITH THE<i>WIDE-FIELD INFRARED SURVEY EXPLORER</i>. I. CHARACTERIZING<i>WISE</i>-SELECTED ACTIVE GALACTIC NUCLEI IN COSMOS

Daniel SternJet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Mail Stop 169-221, Pasadena, CA 91109, USA; [email protected]Roberto J. AssefJet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Mail Stop 169-221, Pasadena, CA 91109, USA; [email protected]Dominic J. BenfordNASA Goddard Space Flight Center, Code 665, Greenbelt, MD 20771, USAAndrew BlainDepartment of Physics and Astronomy, University of Leicester, LE1 7RH Leicester, UKRoc CutriInfrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125, USAArjun DeyNational Optical Astronomical Observatory, 950 N. Cherry Ave., Tucson, AZ 85719, USAPeter EisenhardtJet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Mail Stop 169-221, Pasadena, CA 91109, USA; [email protected]Roger L. GriffithInfrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125, USAT. H. JarrettInfrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125, USASean LakePhysics and Astronomy Department, University of California, Los Angeles, CA 90095, USAFrank MasciInfrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125, USASara PettyPhysics and Astronomy Department, University of California, Los Angeles, CA 90095, USAS. A. StanfordDepartment of Physics, University of California, One Shields Avenue, Davis, CA 95616, USAChao-Wei TsaiInfrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125, USAE. L. WrightPhysics and Astronomy Department, University of California, Los Angeles, CA 90095, USALin YanInfrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125, USAFiona HarrisonSpace Radiation Laboratory, California Institute of Technology, Pasadena, CA 91125, USAKristin MadsenSpace Radiation Laboratory, California Institute of Technology, Pasadena, CA 91125, USA

2012en

ABI

Аннотация

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 (i.e., [3.4]–[4.6] ≥0.8, Vega), which identifies 61.9 ± 5.4 active galactic nucleus (AGN) candidates per deg^2 to a depth of W2 ~ 15.0. This implies a much larger census of luminous AGNs than found by typical wide-area surveys, attributable to the fact that mid-infrared selection identifies both unobscured (type 1) and obscured (type 2) AGNs. Optical and soft X-ray surveys alone are highly biased toward only unobscured AGNs, while this simple WISE selection likely identifies even heavily obscured, Compton-thick AGNs. Using deep, public data in the COSMOS field, we explore the properties of WISE-selected AGN candidates. At the mid-infrared depth considered, 160 μJy at 4.6 μm, this simple criterion identifies 78% of Spitzer mid-infrared AGN candidates according to the criteria of Stern et al. and the reliability is 95%. We explore the demographics, multiwavelength properties and redshift distribution of WISE-selected AGN candidates in the COSMOS field.

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Идентификаторы

DOI: 10.1088/0004-637x/753/1/30

Цитирования и источники

Цитирований: 2Использованных источников: 0

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