J/ApJ/746/L22ivo://CDS.VizieR/J/ApJ/746/L22doi:10.26093/cds/vizier.17469022CDSKoss M.Mushotzky R.Treister E.Veilleux S.Vasudevan R.Trippe M.2017-10-12T12:59:50Z2013-10-17T15:14:55ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fractive-galactic-nucleix-ray-sourcesgalaxiesWe 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 AGNs. Fifty percent of the AGNs with a very close companion (<15 kpc) are dual AGNs. We also find that dual AGNs are more likely to occur in major mergers and tend to avoid absorption line galaxies with elliptical morphologies. Finally, we find that SDSS Seyferts are much less likely than BAT AGNs (0.25% versus 7.8%) to be found in dual AGNs at scales <30 kpc because of a smaller number of companion galaxies, fiber collision limits, a tendency for AGNs at small separations to be detected only in X-rays, and a higher fraction of dual AGN companions with increasing AGN luminosity.2012ApJ...746L..22Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/746/L22CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/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 sitehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/746/L22https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/746/L22http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/746/L22https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/746/L22https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/746/L22http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/746/L22GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/746/L22/table1 (Dual AGN study of BAT sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/746/L22/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/746/L22/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/746/L22/table1?GETtext/xml+votable180.050000true253.24566672.40027780.0055555555555555566/941 953 1677 2221 2251 2564 4439 4488 4535 4834 5149 5395 5514 5970 5976 5989 6212 6241 7184 7277 7361 7386 7424 8216 8845 9894 10348 10630 10662 10788 10847 10977 10995 11071 11158 11416 11490 11683 11898 13021 13511 15015 16690 17492 17727 17748 18484 18524 18897 19283 21785 22365 22626 22912 24381 25182 25907 26041 26148 26375 26393 26515 27767 28075 28275 28593 28609 28639 28654 31158 31509 36785 36861 40221 40410 40818 44017https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/746/L22?format=asciiX-raydefaultJ/ApJ/746/L22/table1Dual AGN study of BAT sampleSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSys[D/S] AGN system type (D=dual or S=single) (dual when the companion is an AGN)src.classcharBATBAT source namemeta.id;meta.maincharGalGalaxy companionmeta.id.assoccharSep[1.5/99.1] Projected separationkpcpos.angDistancefloatM1/M2[0.4/151.4]? Host galaxy stellar mass ratio (2)src.class.starGalaxyfloatnullablel_XLumLimit flag on XLummeta.code.errorcharXLum[0.0001/9.3]? Galaxy companion 2-10keV luminosity (3)1e+35Wphys.luminosity;em.X-raydoublenullabler_XLumSource of X-ray observations (5)meta.ref;pos.framecharDiagGalaxy companion AGN optical diagnostic (4)src.classcharr_DiagReference for Diag (6)meta.ref;pos.framecharSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refchar_RASimbad position of BAT source (right ascension part)degpos.eq.ra;meta.main_DESimbad position of BAT source (declination part)degpos.eq.dec;meta.main