J/MNRAS/465/2120ivo://CDS.VizieR/J/MNRAS/465/2120doi:10.26093/cds/vizier.74652120CDSCoatman L.Hewett P.C.Banerji M.Richards G.T.Hennawi J.F.,Prochaska J.X.2024-08-16T20:19:49Z2018-11-15T16:23:34ZCDS support team

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

cds-question@unistra.frquasarsspectroscopyredshiftedThe CIV{lambda}{lambda}1498,1501 broad emission line is visible in optical spectra to redshifts exceeding z~5. CIV has long been known to exhibit significant displacements to the blue and these 'blueshifts' almost certainly signal the presence of strong outflows. As a consequence, single-epoch virial black hole (BH) mass estimates derived from CIV velocity widths are known to be systematically biased compared to masses from the hydrogen Balmer lines. Using a large sample of 230 high-luminosity (L_Bol_=10^45.5^-10^48^erg/s), redshift 1.5<z<4.0 quasars with both CIV and Balmer line spectra, we have quantified the bias in CIV BH masses as a function of the CIV blueshift. CIV BH masses are shown to be a factor of 5 larger than the corresponding Balmer-line masses at C IV blueshifts of 3000km/s and are overestimated by almost an order of magnitude at the most extreme blueshifts, ?=5000km/s. Using the monotonically increasing relationship between the CIV blueshift and the mass ratio BH(CIV)/BH(H{alpha}), we derive an empirical correction to all CIV BH masses. The scatter between the corrected CIV masses and the Balmer masses is 0.24dex at low CIV blueshifts (~0km/s) and just 0.10dex at high blueshifts (~3000km/s), compared to 0.40dex before the correction. The correction depends only on the CIV line properties - i.e. full width at half-maximum and blueshift - and can therefore be applied to all quasars where CIV emission line properties have been measured, enabling the derivation of unbiased virial BH-mass estimates for the majority of high-luminosity, high-redshift, spectroscopically confirmed quasars in the literature.2017MNRAS.465.2120Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/465/2120CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/241 : The 2dF QSO Redshift Survey (Croom+ 2004)VII/279 : SDSS quasar catalog: twelfth data release (Paris+, 2017)J/AJ/131/1 : Binary quasars in the SDSS (Hennawi+, 2006)J/ApJ/719/1672 : SDSS binary quasars at high redshift. I. (Hennawi+, 2010)J/ApJ/753/125 : NIR spectroscopy follow-up of 60 SDSS-DR7 QSOs (Shen+, 2012)J/A+A/556/A141 : ESO-UVES Advanced Data Products (EUADP) sample (Zafar+, 2013)J/ApJ/776/136 : QPQ VI. HI absorption of z~2 quasars (Prochaska+, 2013)J/ApJ/817/55 : NIR spectroscopy of 1.5<z<3.5 broad-band QSOs (Shen, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/465/2120https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/465/2120http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/465/2120https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/465/2120https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/465/2120http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/465/2120GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/465/2120/table2 (Emission line properties from our parametric model fits)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/465/2120/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/465/2120/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/465/2120/table2?GETtext/xml+votable180.050000true0.1625-0.30108330.005555555555555556Cone search capability for table J/MNRAS/465/2120/tableb (Observational properties (Tables B1-B7))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/465/2120/tableb?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/465/2120/tableb?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/465/2120/tableb?GETtext/xml+votable180.050000true114.554958327.177250.0055555555555555566/4099 4107 4117 4180 4185 4387 4407 4639 4656 4838 4946-4947 4952 4993 5010 5438 5518 5520 5669 5673 5709 5735 5944 6049 6068 6166 6197 6240 6454 6471 7353 7500 7503 8371 8450 8553 8555 8903 9251 9272 9323 9412 9446 9604 9827 9858 9918 9958 9968 10016 10074 10214 10313 10330 10963 11040 11049 11193 11321 11453 11498 11845 11934 16597 16625 16770 17237 17241 17253 17407 17501 17663 17747 17749 17778 17816 17820-17821 17829 17833 18003 18019 18022 18030 18063 18088 18091-18092 18098 18101 18112 18293 18388-18389 18685 18690 18704 18836 18839 18843 18860 18947 19043 19046 19053 19091 19094 19097 19099 19111 19120 19405 19458 19692 20008 21147 22367 22711 23104 23183 23201 23210 25285 25339 25344 25561 25565 25697 25711 25924 25934 25953 25976 26000 26028 26071 26097 26166 26175 26254 26257 26268 26277 26319 26336 26346 26348 26359 26462 26485 26546 26556 26585 26588 26614 26976 26985 27022 27219-27220 27239 27308-27309 27365 27393 27395 27416 27424 27480 27484 27512 27575 27605 27667 27687 27743 27756 27838 27846 27976 28042 28376 28426 28548 28570 30034 30039 31313 31318 31333 31427 31435 31463 31470 31645 31649 31652 31721 32473 33459 34202 35582 35595 35627 35643 36105 36417 43903 44269 44946 46513 46847 46861 46953 47941 48610 49078 491512.381800341673347e-19 2.821731604724377e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/465/2120?format=asciidefaultJ/MNRAS/465/2120/table2Emission line properties from our parametric model fitsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCatalogue name (JHHMMSS.ss+DDMMSS.s) (NAME)meta.id;meta.tablecharFWHMBHa? FWHM of broad H{alpha} line (FWHM_BROAD_HA)km/sspect.line.widthfloatnullablee_FWHMBHa? rms uncertainty on (FWHM_BROAD_HA_ERR)km/sstat.errorfloatnullablesigmaBHa? Dispersion of broad H{alpha} line (SIGMA_BROAD_HA)km/sphys.veloc.dispersionfloatnullablee_sigmaBHa? rms uncertainty on (SIGMA_BROAD_HA_ERR)km/sstat.errorfloatnullablezBHa? Redshift from broad H{alpha} line (Z_BROAD_HA)src.redshift;pos.heliocentricfloatnullableFWHMBHb? FWHM of broad H{beta} line (FWHM_BROAD_HB)km/sspect.line.widthfloatnullablee_FWHMBHb? rms uncertainty on (FWHM_BROAD_HB_ERR)km/sstat.errorfloatnullablesigmaBHb? Dispersion of broad H{beta} line (SIGMA_BROAD_HB)km/sphys.veloc.dispersionfloatnullablee_sigmaBHb? rms uncertainty on (SIGMA_BROAD_HB_ERR)km/sstat.errorfloatnullablezBHb? Redshift from broad H{beta} line (Z_BROAD_HB)src.redshift;pos.heliocentricfloatnullableFWHMCIVFWHM of CIV doublet (FWHM_CIV)km/sspect.line.widthfloate_FWHMCIVrms uncertainty on (FWHM_CIV_ERR)km/sstat.errorfloatsigmaCIVDispersion of CIV doublet (SIGMA_CIV)km/sinstr.dispersionfloate_sigmaCIVrms uncertainty on (SIGMA_CIV_ERR)km/sstat.errorfloatblueCIVHa? Blueshift of CIV relative to centroid of broad H{alpha} (BLUESHIFT_CIV_HA)km/ssrc.redshift;pos.heliocentricfloatnullablee_blueCIVHa? rms uncertainty on (BLUESHIFT_CIV_HA_ERR)km/sstat.errorfloatnullableblueCIVHb? Blueshift of CIV relative to centroid of broad H{beta} (BLUESHIFT_CIV_HB)km/ssrc.redshift;pos.heliocentricfloatnullablee_blueCIVHb? rms uncertainty on (BLUESHIFT_CIV_HB_ERR)km/sstat.errorfloatnullablelogL5100Monochromatic continuum luminosity at 5100{AA} (LOGL5100)log(1e-07W)phys.luminosity;em.optfloatlogL1350Monochromatic continuum luminosity at 1350{AA} (LOGL1350)log(1e-07W)phys.luminosity;spect.continuumfloatSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight ascension (derived from Name) for Eq=J2000degpos.eq.ra;meta.main_DEDeclination (derived from Name) for Eq=J2000degpos.eq.dec;meta.mainJ/MNRAS/465/2120/tablebObservational properties (Tables B1-B7)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTabTable number (B1-B7) (1)meta.id;meta.maincharNameName (JHHMMSS.ss+DDMMSS.s)meta.idcharInstInstrument or ESO programme identificationmeta.id;instrcharObs.DateObservation datetime.epoch;obscharObs.Date2Second observation datetime.epochcharTexp? Exposure timestime.duration;obs.exposureintnullablen_Texp[(H) ] Note on Texpmeta.notecharTexp2? Second exposure timestime.duration;obs.exposureintnullablen_Texp2[(K) ] Note on Texp2meta.notecharS/NHa? S/N measured in the continuum adjacent to H{alpha}, per pixelstat.snrfloatnullableS/NHb? S/N measured in the continuum adjacent to H{beta}, per pixelstat.snrfloatnullabler_S/NSource of optical spectrameta.ref;pos.framecharS/NCIVS/N measured in the continuum adjacent to CIV, per pixelstat.snrfloatzRedshiftsrc.redshiftfloatr_z[abdez] Redshift reference if not from Hewett and Wild (2010, Cat. J/MNRAS/405/2302) (2)meta.ref;pos.framecharimagSDSS i magnitude except note in n_imagmagphot.mag;em.opt.Ifloatn_imag[bce] Note in not SDSS i band in imag (3)meta.notecharRadio[-1/2] Radio classification from FIRST (4)meta.code.classint_RARight ascension (derived from Name) for Eq=J2000degpos.eq.ra;meta.main_DEDeclination (derived from Name) for Eq=J2000degpos.eq.dec;meta.main