J/ApJ/789/112ivo://CDS.VizieR/J/ApJ/789/112doi:10.26093/cds/vizier.17890112CDSComerford J.M.Greene J.E.2017-10-16T09:17:59Z2017-03-17T14:50:43ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiredshiftedspectroscopyOffset active galactic nuclei (AGNs) are AGNs that are in ongoing galaxy mergers, which produce kinematic offsets in the AGNs relative to their host galaxies. Offset AGNs are also close relatives of dual AGNs. We conduct a systematic search for offset AGNs in the Sloan Digital Sky Survey by selecting AGN emission lines that exhibit statistically significant line-of-sight velocity offsets relative to systemic. From a parent sample of 18,314 Type 2 AGNs at z < 0.21, we identify 351 offset AGN candidates with velocity offsets of 50 km/s <|{Delta}v| < 410 km/s. When we account for projection effects in the observed velocities, we estimate that 4%-8% of AGNs are offset AGNs. We designed our selection criteria to bypass velocity offsets produced by rotating gas disks, AGN outflows, and gravitational recoil of supermassive black holes, but follow-up observations are still required to confirm our candidates as offset AGNs. We find that the fraction of AGNs that are offset candidates increases with AGN bolometric luminosity, from 0.7% to 6% over the luminosity range 43 < log (L_bol_) [erg/s] <46. If these candidates are shown to be bona fide offset AGNs, then this would be direct observational evidence that galaxy mergers preferentially trigger high-luminosity AGNs. Finally, we find that the fraction of AGNs that are offset AGN candidates increases from 1.9% at z = 0.1 to 32% at z = 0.7, in step with the growth in the galaxy merger fraction over the same redshift range.2014ApJ...789..112Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/789/112CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/392/1509 : Distribution of AGNs in galaxy clusters (Gilmour+, 2009)J/MNRAS/398/1165 : AGN in nearby galaxies (Goulding+, 2009)J/MNRAS/405/2062 : AGN candidates from 2MASS/ROSAT catalogsJ/MNRAS/407/2399 : AGN activity and black hole mass (McKernan+, 2010)J/other/RMxAA/47.361 : AGN activity in isolated SDSS galaxies (Coziol+, 2011)J/ApJS/218/8 : Swift AGN and Cluster Survey (SACS). I. (Dai+, 2015)J/MNRAS/454/3722 : AGN in nearby low-mass galaxies (Sartori+, 2015)J/ApJS/222/13 : Swift AGN and Cluster Survey (SWCL). II. SDSShttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/789/112https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/789/112http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/789/112https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/789/112https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/789/112http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/789/112GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/789/112/table1 (Summary of Offset AGN Candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/789/112/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/789/112/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/789/112/table1?GETtext/xml+votable180.050000true4.6170417-0.57008330.0055555555555555566/4108 4114 4134 4169 4216 4231 4266 4309 4327 4343 4450 4454 4476 4511 4520 4591 4598 4638 4655 4659 4752 4758 4822 4865 4931 4947 4966 4978 5016 5063 5154 5177 5188 5196 5267 5336 5338 5365 5377 5476 5482 5483 5553 5643 5646 5666 5696 5736 5737 5772 5786 5798 5819 5841 5930 5978 5990 5993 5996 6011 6018 6041 6045 6062 6071 6096 6106 6116 6125 6141 6216 6258 6431 6443 6448 6452 6458 6463 6481 6514 6515 6535 6551 6567 6571 6581 6741 6917 7170 7176 7183 7208 7239 7247 7263 7264 7274 7318 7400 7475 7557 8208 8209 8250 8265 8269 8272 8327 8329 8397 8405 8408 8450 8506 8512 8519 8526 8534 8558 8562 8626 8643 8647 8653 8661 8671 8759 8762 8781 8822 8830 8832 8853 8871 8884 8894 8916 8923 8931 8985 9022 9032 9033 9037 9057 9067 9078 9086 9089 9111 9192 9265 9284 9408 9449 9455 9750 9773 9788 9852 9883 9901 9934 9954 10120 10145 10182 10322 10331 10356 10401 10479 10496 10510 10572 10637 10643 10677 10788 10837 10845 10856 10911 10917 10940 10972 10991 10999 11058 11090 11158 11246 11256 11265 11322 11587 11794 11813 11822 11826 11953 12550 16891 17214 17239 17304 17313 17329 17469 17751 17754 17771 17821 17983 18011 18068 18084 18096 18299 18582 18772 18773 18785 18864 18951 19054 19094 19111 19200 19987 19993 19996 20010 20017 25583 25916 25961 25980 25987 26017 26019 26023 26042 26070 26086 26093 26183 26218 26238 26243 26255 26364 26365 26375 26384 26452 26476 26491 26493 26509 26571 26590 26620 26953 26984 27043 27046 27222 27230 27257 27259 27260 27286 27291 27346 27382 27388 27391 27404 27437 27448 27456 27472 27566 27570 27587 27607 27649 27663 27725 27773 27825 27827 27899 27938 28005 28006 28017 28053 28075 28156 28158 28186 28213 28237 28248 28285 28289 28337 28350 28361 28377 28381 28391 28403 28430 28436 28465 28514 28517 28604 30044 31339 31385 31391 31397 31445 31448 31461 31467 31482 31639 31675 31717 32410 32413 32429 32490 36785 36818 40959https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/789/112?format=asciiOpticaldefaultJ/ApJ/789/112/table1Summary of Offset AGN CandidatesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharzHost galaxy redshiftsrc.redshiftdoublee_zUncertainty in zstat.error;src.redshiftdoubleDelVBLine-of-sight velocity offset of Balmer emission lines (1)km/sphys.veloc;arith.difffloate_DelVBUncertainty in DelVBkm/sstat.errorfloatDelVFLine-of-sight velocity offset of forbidden emission lines (1)km/sphys.veloc;arith.difffloate_DelVFUncertainty in DelVFkm/sstat.errorfloatDelVWWeighted line-of-sight velocity offset (2)km/sphys.veloc;arith.difffloate_DelVWUncertainty in DelVWkm/sstat.errorfloatSloanDisplay the online SDSS data for this galaxymeta.ref.urlchar_RAPosition form SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPosition form SDSS name (declination part)degpos.eq.dec;meta.main