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The DEEP2 Galaxy Redshift Survey: AEGIS Observations of a Dual AGN at z = 0.7

Gerke, Brian F. and Newman, Jeffrey A. and Lotz, Jennifer and Yan, Renbin and Barmby, P. and Coil, Alison L. and Conselice, Christopher J. and Ivison, R. J. and Lin, Lihwai and Koo, David C. and Nandra, Kirpal and Salim, Samir and Small, Todd and Weiner, Benjamin J. and Cooper, Michael C. and Davis, Marc and Faber, S. M. and Guhathakurta, Puragra (2007) The DEEP2 Galaxy Redshift Survey: AEGIS Observations of a Dual AGN at z = 0.7. Astrophysical Journal Letters, 660 (1). L23-L26. ISSN 2041-8205. doi:10.1086/517968.

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We present evidence of a dual active galactic nucleus (AGN) within an early-type galaxy at z = 0.709 in the extended Groth strip. The galaxy lies on the red sequence, with absolute magnitude M_B = -21.0 (AB, with h = 0.7) and rest-frame color U - B = 1.38. Its optical spectrum shows strong, double-peaked [O III] emission lines and weak Hβ emission, with Seyfert-like line ratios. The two narrow peaks are separated by 630 km s^(-1) in velocity and arise from two distinct regions, spatially resolved in the DEIMOS spectrum, with a projected physical separation of 1.2 kpc. HST ACS imaging shows an early-type (E/S0) galaxy with hints of disturbed structure, consistent with the remnant of a dissipationless merger. Multiwavelength photometric information from the AEGIS consortium confirms the identification of a dust-obscured AGN in an early-type galaxy, with detections in X-ray, optical, infrared, and radio wave bands. These data are most readily explained as a single galaxy harboring two AGNs—the first such system to be observed in an otherwise typical early-type galaxy.

Item Type:Article
Related URLs:
URLURL TypeDescription
Newman, Jeffrey A.0000-0001-8684-2222
Lotz, Jennifer0000-0003-3130-5643
Barmby, P.0000-0003-2767-0090
Conselice, Christopher J.0000-0003-1949-7638
Ivison, R. J.0000-0001-5118-1313
Lin, Lihwai0000-0001-7218-7407
Koo, David C.0000-0003-3385-6799
Nandra, Kirpal0000-0002-7150-9192
Salim, Samir0000-0003-2342-7501
Cooper, Michael C.0000-0003-1371-6019
Faber, S. M.0000-0003-4996-214X
Guhathakurta, Puragra0000-0001-8867-4234
Additional Information:© 2007 The American Astronomical Society. Received 2006 May 19; accepted 2006 July 28; published 2007 April 6. We thank M. Boylan-Kolchin and E. Quataert and the anonymous referee for helpful comments. This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech. The National Radio Astronomy Observatory is operated by Associated Universities, Inc., under a cooperative agreement with the National Science Foundation. Further relevant acknowledgments for this work are in Davis et al. (2007)
Funding AgencyGrant Number
Subject Keywords:galaxies : active; galaxies : nuclei
Issue or Number:1
Record Number:CaltechAUTHORS:20100430-110138321
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Official Citation:Brian F. Gerke et al 2007 ApJ 660 L23 doi: 10.1086/517968
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:18092
Deposited By: Tony Diaz
Deposited On:12 May 2010 16:46
Last Modified:08 Nov 2021 23:41

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