J/ApJS/235/40ivo://CDS.VizieR/J/ApJS/235/40doi:10.26093/cds/vizier.22350040CDSLiu H.-Y.Yuan W.Dong X.-B.Zhou H.Liu W.-J.2021-02-23T11:22:25Z2018-10-10T08:19:27ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleispectroscopyvisible-astronomysloan-photometryredshiftedx-ray-sourcesradio-sourcesA new sample of 204 low-mass black holes (LMBHs) in active galactic nuclei (AGNs) is presented with black hole masses in the range of (1-20)x10^5^M_{sun}_. The AGNs are selected through a systematic search among galaxies in the Seventh Data Release (DR7) of the Sloan Digital Sky Survey (SDSS), and careful analyses of their optical spectra and precise measurement of spectral parameters. Combining them with our previous sample selected from SDSS DR4 makes it the largest LMBH sample so far, totaling over 500 objects. Some of the statistical properties of the combined LMBH AGN sample are briefly discussed in the context of exploring the low-mass end of the AGN population. Their X-ray luminosities follow the extension of the previously known correlation with the [OIII] luminosity. The effective optical-to-X-ray spectral indices {alpha}_OX_, albeit with a large scatter, are broadly consistent with the extension of the relation with the near-UV luminosity L_2500{AA}_. Interestingly, a correlation of {alpha}_OX_ with black hole mass is also found, with {alpha}OX being statistically flatter (stronger X-ray relative to optical) for lower black hole masses. Only 26 objects, mostly radio loud, were detected in radio at 20cm in the FIRST survey, giving a radio-loud fraction of 4%. The host galaxies of LMBHs have stellar masses in the range of 10^8.8^-10^12.4^M_{sun}_ and optical colors typical of Sbc spirals. They are dominated by young stellar populations that seem to have undergone continuous star formation history.2018ApJS..235...40Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/235/40CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/59 : the FIRST Survey, version 1999Jul (White+ 1999)IX/30 : Second ROSAT PSPC Catalog (ROSAT, 2000)II/267 : The SDSS Photometric Catalog, DR (Adelman-McCarthy+, 2006)II/294 : The SDSS Photometric Catalog, DR7 (Adelman-McCarthy+, 2009)II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)VIII/92 : The FIRST Survey Catalog, Version 2014Dec17 (Helfand+ 2015)J/ApJS/112/315 : Spectroscopic parameters of Seyfert nuclei (Ho+ 1997)J/ApJS/111/377 : H{gamma} & H{delta} absorption features (Worthey+ 1997)J/A+A/330/108 : ROSAT detected quasars. II. (Yuan+ 1998)J/A+A/417/515 : I Zw 1 unusual emission line spectrum (Veron-Cetty+, 2004)J/ApJ/632/799 : NGC4395 light curves (Peterson+, 2005)J/ApJ/641/L21 : BH mass and velocity dispersion relation (Greene+, 2006)J/ApJS/166/128 : Narrow line Seyfert 1 galaxies from SDSS-DR3 (Zhou+, 2006)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/MNRAS/383/581 : Broad-line Balmer decrements in blue AGN (Dong+, 2008)J/ApJ/736/86 : FeII emission in SDSS type 1 AGNs (Dong+, 2011)J/ApJ/742/68 : HST observations of low-mass BH host galaxies (Jiang+, 2011)J/ApJ/755/167 : Low-mass black holes in SDSS Seyfert 1 galaxies (Dong+, 2012)J/A+A/542/A83 : CAIXA. II. AGNs from excess variance analysis (Ponti+, 2012)J/ApJS/201/10 : SDSS quasar catalog with Swift observations (Wu+, 2012)J/ApJ/768/37 : Radio emission from SDSS quasars (Condon+, 2013)J/ApJ/775/116 : z<0.06 active BH galaxies from SDSS-DR8 (Reines+, 2013)J/A+A/588/A103 : 2nd ROSAT all-sky survey (2RXS) source cat. (Boller+, 2016)J/ApJ/831/168 : 6GHz JVLA obs. of low-z SDSS quasars (Kellermann+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/235/40https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/235/40http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/235/40https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/235/40https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/235/40http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/235/40GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/235/40/lmbh (SDSS DR7 low-mass black holes measurements (tables 1, 2 and 3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/235/40/lmbh?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/235/40/lmbh?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/235/40/lmbh?GETtext/xml+votable180.050000true85.70308330.6720.005555555555555556Cone search capability for table J/ApJS/235/40/table4 (ROSAT detections)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/235/40/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/235/40/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/235/40/table4?GETtext/xml+votable180.050000true124.32737552.02991670.005555555555555556Cone search capability for table J/ApJS/235/40/table5 (FIRST detections)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/235/40/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/235/40/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/235/40/table5?GETtext/xml+votable180.050000true138.119416725.78533330.0055555555555555566/4151 4168 4196 4218 4221 4271 4332 4335 4372 4391 4396 4424 4438 4441 4445 4460 4465 4496 4547 4588 4616 4637 4684 4701 4705 4735 4813 4819 4893 4913 4925 4930 4932 4941 4948 4972 4976 4987 5138 5172 5210 5268 5274 5292 5308 5311 5328 5379 5400 5412 5437 5481 5500 5505 5509 5512 5566 5637 5698 5730 5964 5982 5993 6058 6139 6217 6352 6396 6431 6484 6634 7227 7253 7258 7328 7336 7343 7414 7436 7453 7485 7494 7562 8262 8328 8391 8394 8430 8431 8440 8456 8474 8486 8498 8526 8527 8550 8566 8575 8632 8639 8706 8716 8726 8738 8761 8771 8777 8783 8788 8791 8807 8846 8896 8929 8930 8942 8947 8968 8976 8984 8990 8991 9020 9037 9086 9110 9145 9147 9161 9170 9194 9264 9271 9321 9323 9366 9405 9444 9452 9479 9511 9730 9868 9994 10085 10114 10183 10255 10262 10269 10276 10364 10385 10388 10389 10390 10396 10421 10425 10485 10619 10658 10706 10730 10738 10774 10785 10791 10795 10816 10830 10835 10894 11063 11072 11104 11149 11191 11209 11241 11319 11365 11376 11419 11446 11466 11597 11809 11843 11875 18299 18367 18516 18765 18778 19417 22875 23207 23211 23217 25843 25966 25982 25989 26103 26228 26260 26296 26364 26405 26430 26433 26444 26467 26519 26521 26535 27005 27043 27225 27342 27428 27461 27471 27494 27514 27621 27623 27678 27705 27706 27717 27718 27722 27733 27745 27882 27900 27913 27925 27951 27957 28018 28026 28033 28034 28053 28061 28077 28085 28090 28113 28133 28200 28224 28291 28320 28350 28396 28409 28410 28415 28469 28472 28529 28552 28584 28619 28641 28658 31323 31448 31637 31674 31686 31712 36780 490979.932213363424795e-25 9.932213363424795e-25https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/235/40?format=asciiX-rayOpticalRadiodefaultJ/ApJS/235/40/lmbhSDSS DR7 low-mass black holes measurements (tables 1, 2 and 3)SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/204] Running sequence numbermeta.idintXDisplay the ROSAT detections (table 4)meta.ref.urlintnullableRadDisplay the FIRST detections (table 5)meta.ref.urlintnullableSDSSOfficial SDSS name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharzspec[0.01/0.3] SDSS spectroscopic redshiftsrc.redshiftfloatgmag[13.9/21] SDSS Petrosian g magnitude, uncorrected for Galactic extinctionmagphot.mag;em.opt.Bfloatg-r[0.1/1.1] SDSS Petrosian g-r color indexmagphot.color;em.opt.B;em.opt.RfloatAg[0.03/1.2] Galactic extinction in the g band, Schlegel+ (1998ApJ...500..525S)magphys.absorption.galfloatl_OII3727Upper limit flag for OII3727 (1)meta.code.errorcharOII3727[-16.3/-14.2]? log of emission-line flux, [OII]3727{AA} (1)log(mW.m**-2)phot.fluxfloatnullablel_FEII4570Upper limit flag for FEII4570 (1)meta.code.errorcharFEII4570[-16.2/-13.2]? log of emission-line flux, [FeII]4570{AA} (1)log(mW.m**-2)phot.fluxfloatnullablel_NHBUpper limit flag for NHB (1)meta.code.errorcharNHB[-16.2/-14.5]? log of emission-line flux, H{beta} narrow component (1)log(mW.m**-2)phot.flux;em.line.Hbetafloatnullablel_BHBUpper limit flag for BHB (1)meta.code.errorcharBHB[-15.8/-14]? log of emission-line flux, H{beta} broad component (1)log(mW.m**-2)phot.flux;em.line.HbetafloatnullableOIII5007[-17/-13.6]? log of emission-line flux, [OIII]5007{AA} (1)log(mW.m**-2)phot.flux;em.line.OIIIfloatnullablel_OI6300Upper limit flag for OI6300 (1)meta.code.errorcharOI6300[-17/-14.8]? log of emission-line flux, [OI]6300{AA} (1)log(mW.m**-2)phot.fluxfloatnullablel_NHAUpper limit flag for NHA (1)meta.code.errorcharNHA[-16.1/-13.8]? log of emission-line flux, H{alpha} narrow component (1)log(mW.m**-2)phot.flux;em.line.HalphafloatnullableBHA[-15.1/-13.2]? log of emission-line flux, H{alpha} broad component (1)log(mW.m**-2)phot.flux;em.line.Halphafloatnullablel_NII6583Upper limit flag for NII6583 (1)meta.code.errorcharNII6583[-16.8/-14.1]? log of emission-line flux, [NII]6583{AA} (1)log(mW.m**-2)phot.fluxfloatnullablel_SII6716Upper limit flag for SII6716 (1)meta.code.errorcharSII6716[-16.8/-11.1]? log of emission-line flux, [SII]6716{AA} (1)log(mW.m**-2)phot.fluxfloatnullablel_SII6731Upper limit flag for SII6731 (1)meta.code.errorcharSII6731[-16.8/-14.5]? log of emission-line flux, [SII]6731{AA} (1)log(mW.m**-2)phot.fluxfloatnullableFWHM(BHA)[506/2222]? Line width (FWHM), H{alpha}, broad component (2)km/sspect.line.width;em.line.HalphaintnullableFWHM(OIII)[170/838]? Line width (FWHM), [OIII]5007{AA} (2)km/sspect.line.width;em.line.OIIIintnullableFWHM(SII)[78/509]? Line width (FWHM), [SII]6716{AA} (2)km/sspect.line.widthintnullableMg(tot)[-22.3/-17.3] Total g-band absolute magnitudemagphys.magAbsfloatMg(AGN)[-20.2/-14.1] AGN g-band absolute magnitude (3)magphys.magAbsfloatMg(host)[-22.2/-16.7] Host galaxy g-band absolute magnitude (4)magphys.magAbsfloatLBHA[39.3/42.2] Luminosity of broad H{alpha}; erg/s1e-07Wphys.luminosity;em.optfloatLOIII5007[38.6/42.2] Luminosity of [OIII]5007{AA}; erg/s1e-07Wphys.luminosity;em.optfloatMBH[5/6.3] BH Virial mass estimate (5)solMassphys.massfloatRedd[-1.9/0.4] Eddington ratiophys.luminosity;arith.ratiofloatM*[9/11.6]? Stellar mass of the host galaxysolMasssrc.class.starGalaxyfloatnullablef_M*Note (6)meta.codecharSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlchar_RAPosition from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from SDSS name (declination part)degpos.eq.dec;meta.mainJ/ApJS/235/40/table4ROSAT detectionsSimbadNameSimbad column added by the CDSmeta.idcharcts[0.002/0.9] ROSAT count ratect/sphot.count;em.X-rayfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSet[0/1] Sample (G1)src.sampleintSeq2[6/301] Identification number (G1)meta.id;meta.maininte_cts[0/0.04] Uncertainty in ctsct/sstat.errorfloatNH[0.7/8.1] Galactic column density1e+20cm**-2phys.columnDensity;pos.galacticfloatGamma[1.2/4]? Photon index of X-ray spectrumspect.indexfloatnullableE_Gamma[0.05/1.5]? Upper or symmetric uncertainty in Gammastat.error;stat.maxfloatnullablee_Gamma[0.06/1.4]? Lower uncertainty in Gammastat.errorfloatnullableFx[-13.8/-11.5] log of 0.5-2keV X-ray fluxlog(mW.m**-2)phot.flux;em.X-rayfloate_Fx[0/0.2] Uncertainty in Fxlog(mW.m**-2)stat.errorfloatLx[39.9/44.1] log of 0.5-2keV X-ray luminositylog(1e-07W)phys.luminosity;em.X-rayfloate_Lx[0/0.2] Uncertainty in Lxlog(1e-07W)stat.errorfloatL2500[25.45/28.85] Monochromatic luminosity at 2500{AA}; in erg/s/Hz units1e-07W.Hz**-1meta.unit;phys.luminosityfloatalphaOX[-1.6/-0.7] Optical-to-X-ray effective spectral indexspect.indexfloatSDSSSDSS name (JHHMMSS.ss+DDMMSS.s); column added by CDSmeta.idcharROSATDisplay data from ROSAT (IX/30 and J/A+A/588/A103) within 30"meta.ref.urlcharSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlchar_RAPosition from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from SDSS name (declination part)degpos.eq.dec;meta.mainJ/ApJS/235/40/table5FIRST detectionsSimbadNameSimbad column added by the CDSmeta.idcharSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSet[0/1] Sample (G1)src.sampleintSeq2[22/305] Identification number (G1)meta.id;meta.mainintS20cm[0.6/16.8] Flux density at 20cm from FIRSTmJyphot.flux.density;em.radio.750-1500MHzfloate_S20cm[0.1/0.9] Uncertainty in S20cm (1)mJystat.errorfloatlogP20cm[21.3/23.6] Radio power (W/Hz) at 20cmW/Hzphys.luminosity;em.radio.750-1500MHzfloate_logP20cm[0.02/0.09] Uncertainty in logP20cmW/Hzstat.errorfloatlogR[0.8/2.5] Radio loudness in logscale (2)phot.flux;arith.ratiofloatSDSSSDSS name (JHHMMSS.ss+DDMMSS.s); column added by CDSmeta.idcharFIRSTDisplay data from FIRST (VIII/92) within 3"meta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlchar_RAPosition from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from SDSS name (declination part)degpos.eq.dec;meta.main