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 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:20100430-110138321
- Published Version
Restricted to Repository administrators only
See Usage Policy.
Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20100430-110138321
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.
|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)|
|Subject Keywords:||galaxies : active; galaxies : nuclei|
|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.|
|Deposited By:||Tony Diaz|
|Deposited On:||12 May 2010 16:46|
|Last Modified:||26 Dec 2012 12:00|
Repository Staff Only: item control page