J/ApJ/755/167ivo://CDS.VizieR/J/ApJ/755/167doi:10.26093/cds/vizier.17550167CDSDong X.-B.Ho L.C.Yuan W.Wang T.-G.Fan X.Zhou H.Jiang N.2017-06-26T11:49:40Z2014-04-17T07:32:06ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleispectroscopyvisible-astronomysloan-photometryWe have conducted a systematic search of low-mass black holes (BHs) in active galactic nuclei (AGNs) with broad H{alpha} emission lines, aiming at building a homogeneous sample that is more complete than previous ones for fainter, less highly accreting sources. For this purpose, we developed a set of elaborate, automated selection procedures and applied it uniformly to the Fourth Data Release of the Sloan Digital Sky Survey. Special attention is given to AGN-galaxy spectral decomposition and emission-line deblending. We define a sample of 309 type 1 AGNs with BH masses in the range 8x10^4^-2x10^6^M_{sun}_ (with a median of 1.2x10^6^M_{sun}_), using the virial mass estimator based on the broad H{alpha} line. About half of our sample of low-mass BHs differs from that of Greene & Ho (2007, Cat. J/ApJ/670/92), with 61 of them discovered here for the first time. Our new sample picks up more AGNs with low accretion rates: the Eddington ratios of the present sample range from <~0.01 to ~1, with 30% below 0.1. This suggests that a significant fraction of low-mass BHs in the local universe are accreting at low rates. The host galaxies of the low-mass BHs have luminosities similar to those of L* field galaxies, optical colors of Sbc spirals, and stellar spectral features consistent with a continuous star formation history with a mean stellar age of less than 1Gyr.2012ApJ...755..167Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/755/167CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)J/A+A/549/A119 : Black-hole masses of type-1 AGNs (Caccianiga+, 2013)J/ApJS/194/42 : SDSS-DR3 MgII-based black hole masses (Rafiee+, 2011)J/ApJ/742/68 : HST observations of low-mass BH host galaxies (Jiang+, 2011)J/ApJ/711/284 : Galaxy Zoo: AGN host galaxies (Schawinski+, 2010)J/MNRAS/407/2399 : AGN activity and black hole mass (McKernan+, 2010)J/ApJ/702/441 : Obscured active galaxies (Greene+, 2009)J/ApJ/699/800 : Mass functions of active black holes (Vestergaard+, 2009)J/ApJ/699/453 : Determination of black hole masses (Shaposhnikov+, 2009)J/ApJ/692/856 : Supermassive black holes masses upper limits (Beifiori+, 2009)J/ApJ/690/20 : Models of the AGN and black hole populations (Shankar+, 2009)J/ApJ/680/169 : SDSS DR5 virial black hole masses (Shen+, 2008)J/ApJ/670/92 : New sample of low-mass black holes in AGN (Greene+, 2007)J/ApJ/667/131 : Mass function of active black holes (Greene+, 2007)J/ApJS/168/1 : Black hole mass estimates (Kelly+, 2007)J/ApJ/641/L21 : BH mass and velocity dispersion relation (Greene+, 2006)J/ApJ/614/91 : Black hole mass and accretion rate of AGNs (Wu+, 2004)J/ApJ/596/437 : Stellar-mass black holes in the SDSS (Chisholm+, 2003)http://www.sdss.org/ : SDSS home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/755/167https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/755/167http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/755/167https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/755/167https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/755/167http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/755/167GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/755/167/galaxies (SDSS-DR4 Seyfert 1 galaxy sample with emission-line and luminosity and mass measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/755/167/galaxies?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/755/167/galaxies?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/755/167/galaxies?GETtext/xml+votable180.050000true0.2964583-10.03213890.0055555555555555566/547 4117 4122 4151 4162 4168 4184 4196 4226 4237 4258 4260 4825 4838 4847 4848 5002 5093 5099 5100 5103 5370 5437 5455 5479 5481 5491 5499 5500 5524 5541 5563 5566 5569 5582 5604 5610 5628 5662 5690 5698 5715 5730 5770 5910 5931 5939 5959 5964 5977 5982 5985 5988 5993 6015 6058 6065 6098 6139 6142 6166 6217 6259 6266 6352 6389 6396 6406 6408 6431 6436 6444 6484 6555 6562 6579 6588 6589 6599 6600 6617 6652 7169 7173 7177 7193 7227 7253 7258 7273 7293 7298 7299 7306 7317 7320 7432 7436 7453 7466 7485 7557 8208 8740 9053 9086 9150 9170 9194 9242 9366 9444 9452 9730 9795 9808 9824 9868 9869 9923 9957 9994 9999 10021 10085 10092 10183 10214 10513 10515 10619 10658 10691 10706 10730 10835 10839 10869 10878 10907 10934 10995 11002 11054 11056 11065 11072 11097 11149 11171 11191 11209 11231 11241 11253 11254 11270 11319 11365 11405 11419 11445 11446 11466 11500 11597 11617 11831 11838 11843 11875 11909 11930 11939 12390 12397 16891 17215 17308 17316 17555 17558 17574 17773 18006 18028 18074 18084 18299 18367 18404 18516 18590 18765 18767 18774 18800 18845 18976 19021 19114 19417 19456 19686 19697 19753 19778 20007 20010 21999 22005 23054 23194 23207 23211 23217 25583 25843 25919 25926 25929 25932 25941 25948 25966 25982 25989 26006 26017 26019 26041 26044 26048 26063 26167 26212 26221 26228 26229 26230 26260 26265 26273 26296 26306 26373 26405 26411 26525 26549 26601 26606 26948 27005 27030 27043 27075 27077 27080 27081 27105 27225 27227 27229 27233 27279 27318 27358 27364 27370 27390 27402 27419 27428 27461 27478 27480 27485 27514 27562 27590 27718 27749 27801 27823 27836 28171 30044 31315 31316 31323 31365 31394 31436 31459 32443 36724 36763 36767 36780 49009 490973.588997330618193e-19 4.653515163505597e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/755/167?format=asciiOpticaldefaultJ/ApJ/755/167/galaxiesSDSS-DR4 Seyfert 1 galaxy sample with emission-line and luminosity and mass measurementsl_[Ha]nThe 3{sigma} upper limit flag on [Ha]nmeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/309] Identifier from this papermeta.idintSDSSOfficial SDSS-DR4 name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharz[0.005/0.4] SDSS pipeline redshiftsrc.redshiftfloatgmag[13.4/21.4] Petrosian SDSS g band magnitude (1)magphot.mag;em.opt.Bfloatg-r[0.01/1.1] Petrosian SDSS (g-r) color indexmagphot.color;em.opt.B;em.opt.RfloatAg[0.02/1.1] Galactic extinction in the g bandmagphys.absorption.galfloatSloanDisplay the SDSS online data for this AGNmeta.ref.urlcharl_[3727]The 3{sigma} upper limit flag on [3727]meta.code.errorchar[3727]? Log of [OII] (3727{AA}) flux (2)log(mW.m**-2)phot.fluxfloatnullablel_[4570]The 3{sigma} upper limit flag on [4570]meta.code.errorchar[4570]Log of FeII (4570{AA}) flux (2)log(mW.m**-2)phot.fluxfloatl_[Hb]nThe 3{sigma} upper limit flag on [Hb]nmeta.code.errorchar[Hb]nLog of narrow H{beta} flux (2)log(mW.m**-2)phot.fluxfloatl_[Hb]bThe 3{sigma} upper limit flag on [Hb]bmeta.code.errorchar[Hb]b? Log of broad H{beta} flux (2)log(mW.m**-2)phot.fluxfloatnullable[5007]Log of [OIII] (5007{AA}) flux (2)log(mW.m**-2)phot.fluxfloatl_[5007]The 3{sigma} upper limit flag on [5007]meta.code.errorchar[6300]? Log of [OI] (6300{AA}) flux (2)log(mW.m**-2)phot.fluxfloatnullable[Ha]nLog of narrow H{alpha} flux (2)log(mW.m**-2)phot.fluxfloat[Ha]bLog of broad H{alpha} flux (2)log(mW.m**-2)phot.fluxfloatl_[6583]The 3{sigma} upper limit flag on [6583]meta.code.errorchar[6583]? Log of [NII] (6583{AA}) flux (2)log(mW.m**-2)phot.fluxfloatnullablel_[6716]The 3{sigma} upper limit flag on [6716]meta.code.errorchar[6716]? Log of [SII] (6716{AA}) flux (2)log(mW.m**-2)phot.fluxfloatnullablel_[6731]The 3{sigma} upper limit flag on [6731]meta.code.errorchar[6731]? Log of [SII] (6731{AA}) flux (2)log(mW.m**-2)phot.fluxfloatnullableW(Ha)[486/2382] FWHM of broad H{alpha} line (3)km/sspect.line.widthintW(5007)[85/800]? FWHM of [OIII] (5007{AA}) line (3)km/sspect.line.widthintnullableW(6731)[70/450]? FWHM of [SII] (6731{AA}) line (3)km/sspect.line.widthintnullablegMag[-22.4/-17.4] Total SDSS g-band absolute magnitudemagphys.magAbsfloatgMagA[-20.6/-12.3] AGN SDSS g-band absolute magnitude (4)magphys.magAbsfloatgMagh[-22.2/-15.9] Host galaxy SDSS g-band absolute magnitude (5)magphys.magAbsfloatlogLHaLog broad H{alpha} luminosity (log(erg/s))log(1e-07W)phys.luminosity;em.line.HalphafloatlogM[4.9/6.3] Log virial blackhole masslog(solMass)phys.massfloatlogL[-2.4/0.3] Log of Eddington ratiophys.luminosity;arith.ratiofloatSimbadNameSimbad column added by the CDSmeta.idcharNEDSimbad column added by the CDSmeta.ref.urlchar_RAPositions from SDSS-DR4 names (right ascension part)degpos.eq.ra;meta.main_DEPositions from SDSS-DR4 names (declination part)degpos.eq.dec;meta.main