• DOI:10.1086/517968
• Corpus ID: 14320681

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

@article{Gerke2007TheDG,
  title={The DEEP2 Galaxy Redshift Survey: AEGIS Observations of a Dual AGN at z = 0.7},
  author={Brian F. Gerke and Jeffrey A. Newman and Jennifer Lotz and Ren-bin Yan and Pauline Barmby and Alison L. Coil and Christopher J. Conselice and R. J. Ivison and Lihwai Lin and David C. Koo and K. Nandra and Samir Salim and Todd A. Small and Benjamin J. Weiner and Michael C. Cooper and Marc Davis and S. M. Faber and Puragra Guhathakurta},
  journal={The Astrophysical Journal},
  year={2007},
  volume={660}
}

• B. Gerke, J. Newman, +15 authors P. Guhathakurta
• Published 17 August 2006
• Physics
• The Astrophysical Journal

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.