J/ApJ/920/74ivo://CDS.VizieR/J/ApJ/920/74doi:10.26093/cds/vizier.19200074CDSJun H.D.Im M.Hyun M.Yoon Y.Eisenhardt P.R.M.Hong J.Jeon Y.,Kim D.,Kim J.-W.,Kim Ji H.,Park C.2023-05-26T09:10:58Z2023-02-28T07:59:56ZCDS support team

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

cds-question@unistra.frgalaxy-clustersquasarsblack-holesinfrared-photometryWe measure a strong excess in the galaxy number density around PG1630+377, an extremely massive (MBH~109.7M{sun}) quasar at z=1.475, using near-infrared narrowband imaging. We identify 79 narrow H-band excess objects in a 525arcmin^2^ area including the vicinity and surroundings of the quasar. These sources are likely H{alpha} line emitting, star-forming galaxies at z~1.47. We detect a {delta}=6.6{+/-}2.7 overdensity of narrow H-band excess objects located at a projected distance ~2.1Mpc northeast of the quasar, which is the densest region in the target area. The overdensity is present in BzK color-selected galaxies, while a previously reported overdensity in the immediate vicinity of PG1630+377 is not, and yet appears as a group-like structure. These megaparsec-scale environments are estimated to merge into a ~1014.7M{sun} cluster at present. Our results support the view that extremely massive black holes form and grow in group-scale environments and later incorporate into a galaxy cluster.2021ApJ...920...74Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/920/74CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/207 : Palomar-Green catalog UV-excess stellar objects (Green+ 1986)VII/289 : SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020)J/ApJS/162/1 : MUSYC; optical source catalog (Gawiser+, 2006)J/AJ/132/1275 : CIRS (Cluster Infall Regions in the SDSS). I. (Rines+, 2006)J/ApJ/654/115 : DEEP2 Galaxy Redshift Survey; SDSS QSOs (Coil+, 2007)J/ApJ/662/808 : Cusp radius in luminous elliptical galaxies (Lauer+, 2007)J/ApJ/677/169 : H{alpha} galaxies at z=0.84 (Villar+, 2008)J/ApJ/708/137 : Broad-line AGNs in zCOSMOS survey (Merloni+, 2010)J/MNRAS/416/2041 : H{alpha} emitters at z=2.23 (Matsuda+, 2011)J/ApJ/765/87 : Chandra observations of 2QZ Cluster 1004+00 (Lehmer+, 2013)J/MNRAS/428/1128 : UDS/COSMOS HiZELS galaxies (Sobral+, 2013)J/ApJ/795/158 : The MASSIVE survey ; 116 candidate galaxies (Ma+, 2014)J/ApJ/804/34 : Luminous AGNs and early-type SDSS galaxies (Hong+, 2015)J/MNRAS/451/2303 : CF-HiZELS survey (Sobral+, 2015)J/ApJ/859/38 : HST grism obs. of CARLA galaxy cluster cand. (Noirot+, 2018)J/ApJS/243/24 : The CASBaH galaxy redshift survey (Prochaska+, 2019)J/ApJ/871/57 : SDSS & MMT obs. extremely massive QSOs & gal. (Yoon+, 2019)J/ApJS/249/17 : SDSS QSO DR14 spectral properties (Rakshit+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/920/74https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/920/74http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/920/74https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/920/74https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/920/74http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/920/74GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/920/74/table1 (H-alpha emitter properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/920/74/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/920/74/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/920/74/table1?GETtext/xml+votable180.050000true248.0046737.630580.0055555555555555565/2364 6/https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/920/74?format=asciiInfrareddefaultJ/ApJ/920/74/table1H-alpha emitter propertiesSeq[1/79] Sequential item numbermeta.id;meta.number;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDet[1/3] UKIRT WFCAM Detector (1)instr;instr.detintRAJ2000[247/249] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[37/38] Declination (J2000)degpos.eq.dec;meta.mainHmag[15.8/23.3] Hband (broad-band) AB magnitude (2)magphot.mag;em.IR.Hfloate_Hmag[0/0.4] Uncertainty in Hmag (2)magstat.error;phot.magfloatNBHmag[14.9/22.1] Narrow-band H-band AB magnitude (2)magphot.mag;em.IR.Hfloate_NBHmag[0/0.3] Uncertainty in NBHmag (2)magstat.error;phot.magfloatH-NBH[0.19/1.51] Hmag-NBHmag, broad-narrow color (3)magphot.color;em.IR;em.IRfloate_H-NBH[0/0.4] Uncertainty in (H-NBH) (3)magstat.errorfloatJmag[15.9/26.1] Jband (broad-band) AB magnitude (2)magphot.mag;em.IR.Jfloate_Jmag[0/3] Uncertainty in Jmag (2)magstat.error;phot.magfloatKmag[16.1/23.3] Kband (broad-band) AB magnitude (2)magphot.mag;em.IR.Kfloate_Kmag[0.01/0.3] Uncertainty in Kmag (2)magstat.error;phot.magfloatSigma-NBH[2.5/319] Significance NBH emission; Equation 1stat.fit.goodnessfloatEW-Ha[17/366] Rest-frame line equivalent width (4)0.1nmspect.line.eqWidthinte_EW-Ha[0/84] Uncertainty in EW-Ha (4)0.1nmstat.error;spect.line.eqWidthintLogLHa[42/44.9] H{alpha} luminosity from the NBH excess flux (5)1e-07Wphys.luminosity;em.line.Halphafloate_LogLHa[0/0.2] Uncertainty in LogLHa (5)1e-07Wstat.errorfloatdelta[-0.7/5.9] Overdensity of neighbor galaxies (6)phys.density;arith.ratiofloat