Dual AGNs in the nearby Universe : J/ApJ/746/L22

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Authors : Koss M. orcid , Mushotzky R., Treister E. (hide) , Mushotzky R., Treister E. et..al

VizieR DOI : https://doi.org/10.26093/cds/vizier.17469022
Bibcode : 2012ApJ...746L..22K (ADS) (Simbad) (Objects)
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Data origin :

CDS Keywords : Active gal. nuclei; X-ray sources; Galaxies, nearby
UAT : Active galactic nuclei, X-ray sources, Galaxies

Observation (OC)

Records :

Inserted into VizieR : 17-Oct-2013
Last modification : 12-Oct-2017

Understanding dual active galactic nucleus activation in the nearby Universe. (2012)

Keywords : galaxies active - galaxies: interactions - X-rays: galaxies

Abstract:We study the fraction of dual active galactic nuclei (AGNs) in a sample of 167 nearby (z < 0.05), moderate-luminosity, ultra-hard X-ray-selected AGNs from the all-sky Swift Burst Alert Telescope (BAT) survey. Combining new Chandra and Gemini observations together with optical and X-ray observations, we find that the dual AGN frequency at scales <100 kpc is ~10% (16/167). Of the 16 dual AGNs, only 3 (19%) were detected using X-ray spectroscopy and were not detected using emission line diagnostics. Close dual AGNs (<30 kpc) tend to be more common among the most X-ray luminous systems. In dual AGNs, the X-ray luminosity of both AGNs increases strongly with decreasing galaxy separation, suggesting that the merging event is key in powering both ...(more)
Abstract: (hide)
American Astronomical Society policies
The Burst Alert Telescope (BAT) AGN sample consists of 167 nearby (z<0.05) ultra-hard X-ray BAT-detected AGNs from Koss et al. (2011, Cat. J/ApJ/739/57) catalog in the Northern sky (>-25{deg}), with low Galactic extinction (E(B-V)<0.5). For each BAT AGN, we search the SDSS, 6DF, 2DF, and NED for apparent companions within 100kpc with small radial velocity differences (<300km/s). To determine the AGN nature of the galaxy companions, we use X-ray data from Chandra, XRT, or XMM.

  • B/chandra : The Chandra Archive Log (CXC, 1999-2013)
  • B/xmm : XMM-Newton Obs. Log (XMM-Newton Science Operation Center, 2012)
  • II/306 : The SDSS Photometric Catalog, Release 8 (Adelman-McCarthy+, 2011)
  • VII/259 : 6dF galaxy survey final redshift release (Jones+, 2009)
  • II/268 : The 2dF QSO Redshift Survey Input Catalogue (Smith+ 2005)
  • VII/241 : The 2dF QSO Redshift Survey (Croom+ 2004)
  • VII/250 : The 2dF Galaxy Redshift Survey (2dFGRS) (2dFGRS Team, 1998-2003)
  • J/ApJ/728/58 : Swift-BAT survey of AGNs (Burlon+, 2011)
  • J/ApJ/739/57 : Ultra hard X-ray AGNs in the Swift/BAT survey (Koss+, 2011)
  • J/A+A/524/A64 : The 54-month Palermo BAT-survey catalogue (Cusumano+, 2010)
  • J/A+A/510/A48 : Palermo Swift-BAT Hard X-ray Catalogue (Cusumano+, 2010)
  • J/ApJ/681/113 : Swift BAT survey of AGNs (Tueller+, 2008)
  • J/ApJ/678/102 : BAT X-ray survey. I. (Ajello+, 2008)
  • J/ApJ/633/L77 : SWIFT/BAT detections of AGN (Markwardt+, 2005)
  • http://www.sdss.org/ : SDSS Web site

                


                

                    

                


                

                    

                


                

                    
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