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A Flaring AGN in a ULIRG Candidate in Stripe 82

Prakash, Abhishek and Chary, Ranga Ram and Helou, George and Faisst, Andreas and Graham, Matthew J. and Masci, Frank J. and Shupe, David L. and Lee, Bomee (2019) A Flaring AGN in a ULIRG Candidate in Stripe 82. Astrophysical Journal, 883 (2). Art. No. 154. ISSN 1538-4357.

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We report the discovery of a mid-infrared variable AGN that is hosted by an ultraluminous infrared galaxy (ULIRG) in the Sloan Stripe 82 field. WISE J030654.88+010833.6 is a red, extended galaxy, which we estimate to be at a photometric redshift of 0.28 ≤ z ≤ 0.31, based on its optical and near-infrared spectral energy distribution (SED). The factor of two variability over 8 yr seen in the Wide-field Infrared Survey Explorer (WISE) 3.4 and 4.6 μm wavelength channels is not clearly correlated with optical variability in archival data. Based on our estimation of the physical parameters of the host galaxy, J030654.88+010833.6 is possibly a composite AGN/starburst ULIRG in a phase where high star formation ~70 M_⊙ yr^(−1) is occurring. Our estimate of the black hole mass to stellar mass ratio also appears to be consistent with that of broad line AGN in the local universe. The long-term variability of J030654.88+010833.6 as seen in the WISE W1 and W2 light curves is likely due to variations in the accretion rate, with the energy being reprocessed by dust in the vicinity of the AGN.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Prakash, Abhishek0000-0003-4451-4444
Chary, Ranga Ram0000-0001-7583-0621
Helou, George0000-0003-3367-3415
Faisst, Andreas0000-0002-9382-9832
Graham, Matthew J.0000-0002-3168-0139
Masci, Frank J.0000-0002-8532-9395
Shupe, David L.0000-0003-4401-0430
Lee, Bomee0000-0003-1954-5046
Additional Information:© 2019. The American Astronomical Society. Received 2019 February 28; revised 2019 August 11; accepted 2019 August 12; published 2019 September 30. This work was supported by Joint Survey Processing (JSP) at IPAC/Caltech, which is aimed at combined analysis of Euclid, LSST, and WFIRST. Funding for JSP has been provided by NASA grant 80NM0018F0803. This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. This research has also made use of the NASA/IPAC Extragalactic Database (NED) which is operated by JPL/Caltech, under contract with NASA. Ned Wright's Cosmology Calculator was also used in preparing this paper. We thank the Spitzer Science Center Director and observation support team for an award of Director's Discretionary Time for this project. Funding for the Sloan Digital Sky Survey IV has been provided by the Alfred P. Sloan Foundation, the U.S. Department of Energy Office of Science, and the Participating Institutions. SDSS acknowledges support and resources from the Center for High-Performance Computing at the University of Utah. The SDSS website is SDSS is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration including the Brazilian Participation Group, the Carnegie Institution for Science, Carnegie Mellon University, the Chilean Participation Group, the French Participation Group, Harvard-Smithsonian Center for Astrophysics, Instituto de Astrofísica de Canarias, The Johns Hopkins University, Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo, the Korean Participation Group, Lawrence Berkeley National Laboratory, Leibniz Institut für Astrophysik Potsdam (AIP), Max-Planck-Institut für Astronomie (MPIA Heidelberg), Max-Planck-Institut für Astrophysik (MPA Garching), Max-Planck-Institut für Extraterrestrische Physik (MPE), National Astronomical Observatories of China, New Mexico State University, New York University, University of Notre Dame, Observatório Nacional/MCTI, The Ohio State University, Pennsylvania State University, Shanghai Astronomical Observatory, United Kingdom Participation Group, Universidad Nacional Autónoma de México, University of Arizona, University of Colorado Boulder, University of Oxford, University of Portsmouth, University of Utah, University of Virginia, University of Washington, University of Wisconsin, Vanderbilt University, and Yale University. The Pan-STARRS1 Surveys (PS1) have been made possible through contributions of the Institute for Astronomy, the University of Hawaii, the PanSTARRS Project Office, the Max-Planck Society and its participating institutes, the Max Planck Institute for Astronomy, Heidelberg and the Max Planck Institute for Extraterrestrial Physics, Garching, The Johns Hopkins University, Durham University, the University of Edinburgh, Queen's University Belfast, the Harvard-Smithsonian Center for Astrophysics, the Las Cumbres Observatory Global Telescope Network Incorporated, the National Central University of Taiwan, the Space Telescope Science Institute, the National Aeronautics and Space Administration under grant No. NNX08AR22G issued through the Planetary Science Division of the NASA Science Mission Directorate, the National Science Foundation under grant No. AST-1238877, the University of Maryland, and Eotvos Lorand University (ELTE). The Catalina Real-time Transient survey is funded by the National Aeronautics and Space Administration under grant No. NNG05GF22G issued through the Science Mission Directorate Near-Earth Objects Observations Program. The CRTS survey is supported by the U.S. National Science Foundation under grants AST-0909182.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Alfred P. Sloan FoundationUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Participating InstitutionsUNSPECIFIED
University of UtahUNSPECIFIED
University of MarylandUNSPECIFIED
Eotvos Lorand University (ELTE)UNSPECIFIED
Subject Keywords:Active galactic nuclei ; AGN host galaxies ; Black holes ; Light curves ; Surveys
Issue or Number:2
Record Number:CaltechAUTHORS:20191001-101354875
Persistent URL:
Official Citation:Abhishek Prakash et al 2019 ApJ 883 154
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98979
Deposited By: George Porter
Deposited On:01 Oct 2019 18:16
Last Modified:03 Oct 2019 21:46

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