Multiple AGN in the crowded field of the compact group SDSS J0959+1259

Journal
Date Issued
2015
Author(s)
•
Bianchi, S.
•
Bogdanović, T.
•
•
Herrero-Illana, R.
•
Husemann, B.
•
Komossa, S.
•
Kun, E.
•
Loiseau, N.
•
Paragi, Z.
•
Perez-Torres, M.
•
•
Schawinski, K.
•
Vignali, C.
DOI
Description
We thank the anonymous referee for his/her helpful comments which improved the manuscript. All coauthors, members of the MAGNA project ( http://www.issibern.ch/teams/agnactivity/Home.html ), gratefully acknowledge support of the International Space Science Institute (ISSI) in Bern, Switzerland. TB acknowledges the support from the Alfred P. Sloan Foundation under grant no. BR2013-016 and the National Science Foundation under grant no. NSF AST-1211677. Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy Office of Science. The SDSS-III web site is http://www.sdss3.org/ . SDSS-III is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS-III Collaboration including the University of Arizona, the Brazilian Participation Group, Brookhaven National Laboratory, Carnegie Mellon University, University of Florida, the French Participation Group, the German Participation Group, Harvard University, the Instituto de Astrofisica de Canarias, the Michigan State/Notre Dame/JINA Participation Group, Johns Hopkins University, Lawrence Berkeley National Laboratory, Max Planck Institute for Astrophysics, Max Planck Institute for Extraterrestrial Physics, New Mexico State University, New York University, Ohio State University, Pennsylvania State University, University of Portsmouth, Princeton University, the Spanish Participation Group, University of Tokyo, University of Utah, Vanderbilt University, University of Virginia, University of Washington, and Yale University. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.
Abstract
We present a multiwavelength study of a newly discovered compact group (CG), SDSS J0959+1259, based data from XMM-Newton, Sloan Digital Sky Survey (SDSS) and the Calar Alto optical imager BUSCA. With a maximum velocity offset of 500 km s-1, a mean redshift of 0.035, and a mean spatial extension of 480 kpc, this CG is exceptional in having the highest concentration of nuclear activity in the local Universe, established with a sensitivity limit LX > 4 × 1040 erg s-1 in 2-10 keV band and R-band magnitude MR < -19. The group is composed of two type-2 Seyferts, one type-1 Seyfert, two LINERs and three star-forming galaxies. Given the high X-ray luminosity of LINERs which reaches ̃1041 erg s-1, it is likely that they are also accretion driven, bringing the number of active nuclei in this group to five out of eight (AGN fraction of 60 per cent). The distorted shape of one member of the CG suggests that strong interactions are taking place among its galaxies through tidal forces. Therefore, this system represents a case study for physical mechanisms that trigger nuclear activity and star formation in CGs.
Volume
453
Issue
1
Start page
214
Uri
Url
Issn Identifier
0035-8711
Ads BibCode
2015MNRAS.453..214D
Rights
open.access
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