J/ApJ/950/97ivo://CDS.VizieR/J/ApJ/950/97doi:10.26093/cds/vizier/ba-xp-31CDSHa T.Dix C.Matthews B.M.Shemmer O.Brotherton M.S.Myers A.D.,Richards G.T.Maithil J.Anderson S.F.Brandt W.N.,Diamond-Stanic A.M.Fan X.Gallagher S.C.Green R.Lira P.Luo B.,Netzer H.Plotkin R.M.Runnoe J.C.Schneider D.P.Strauss M.A.,Trakhtenbrot B.Wu J.2026-07-02T11:59:48Z2025-09-04T13:06:14ZCDS support team

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

cds-question@unistra.frquasarsactive-galactic-nucleiredshiftedline-intensitiesblack-holesultraviolet-astronomyvisible-astronomyWeak emission-line quasars (WLQs) are a subset of type 1 quasars that exhibit extremely weak Ly{alpha}+NV{lambda}1240 and/or CIV{lambda}1549 emission lines. We investigate the relationship between emission-line properties and accretion rate for a sample of 230 "ordinary" type 1 quasars and 18 WLQs at z<0.5 and 1.5<z<3.5 that have rest-frame ultraviolet and optical spectral measurements. We apply a correction to the H{beta}-based black hole mass (M_BH_) estimates of these quasars using the strength of the optical FeII emission. We confirm previous findings that WLQs' M_BH_ values are overestimated by up to an order of magnitude using the traditional broad-emission-line region size-luminosity relation. With this MBH correction, we find a significant correlation between H{beta}-based Eddington luminosity ratios and a combination of the rest-frame CIV equivalent width and CIV blueshift with respect to the systemic redshift. This correlation holds for both ordinary quasars and WLQs, which suggests that the two-dimensional CIV parameter space can serve as an indicator of accretion rate in all type 1 quasars across a wide range of spectral properties.2023ApJ...950...97Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/950/97CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/289 : SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020)J/AJ/122/503 : SDSS u*g*r*i*z* phot. and redshift of QSOs (Anderson+, 2001)J/AJ/129/2542 : BL Lac from SDSS (Collinge+, 2005)J/ApJS/166/470 : SDSS-Spitzer type I QSOs IR photometry (Richards+, 2006)J/ApJ/699/782 : High-redshift SDSS-DR5 QSOs (Diamond-Stanic+, 2009)J/ApJ/696/580 : Properties of weak emission-line QSOs (WLQ) (Shemmer+, 2009)J/AJ/139/390 : Opt. selected BL Lac objects from SDSS-DR7 (Plotkin+, 2010)J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)J/ApJ/747/10 : X-ray and multiwavelength properties of 11 WLQs (Wu+, 2012)J/ApJ/782/45 : SEAMBHs. I. Mrk 142, Mrk 335 & IRAS F12397+3333 (Du+, 2014)J/A+A/568/A114 : SDSS quasars with weak emission lines (Meusinger+, 2014)J/ApJ/805/122 : X-ray properties of PHL1811 analogs and WLQs (Luo+, 2015)J/ApJS/216/4 : SDSS-RM project: technical overview (Shen+, 2015)J/ApJS/227/11 : PS1 z>5.6 quasars follow-up (Banados+, 2016)J/ApJ/818/L14 : RM AGNs accretion rates and BH masses (Du+, 2016)J/ApJ/817/55 : NIR spectroscopy of 1.5<z<3.5 broad-band QSOs (Shen, 2016)J/ApJ/831/7 : SDSS-RM project: peak velocities of QSOs (Shen+, 2016)J/ApJ/856/6 : SEAMBHs IX. 10 new H{beta} light curves (Du+, 2018)J/ApJ/886/42 : Reverberation mapping & opt. sp. data of AGNs (Du+, 2019)J/ApJ/873/35 : Gemini GNIRS NIR sp. of 50 QSOs at z>~5.7 (Shen+, 2019)J/MNRAS/488/1519 : Calibration of the virial factor f in SMBHs (Yu+, 2019)J/MNRAS/492/719 : Chandra obs. of 2106 radio-quiet QSOs (Timlin+, 2020)J/ApJ/901/133 : BH masses of reverberation-mapped AGNs (Yu+, 2020)J/MNRAS/491/5881 : Extended size-luminosity relation for RM AGNs (Yu+, 2020)J/ApJS/252/15 : GNIRS-Distant Quasar Survey (GNIRS-DQS) (Matthews+, 2021)J/AJ/162/270 : VLA observation of 50 z~1.65 quasars (Richards+, 2021)J/ApJ/931/154 : High-quality UV & X-ray quasar spectral data (Rivera+, 2022)J/ApJ/950/95 : GNIRS-DQS: SDSS 1.5<z<3.5 QSOs (Matthews+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/950/97https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/950/97http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/950/97https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/950/97https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/950/97http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/950/97GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/950/97/table1 (Basic properties of the weak emission-line quasar (WLQ) sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/950/97/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/950/97/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/950/97/table1?GETtext/xml+votable180.050000true16.6801192-3.26008250.005555555555555556Cone search capability for table J/ApJ/950/97/table2 (Basic properties of the ordinary quasar sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/950/97/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/950/97/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/950/97/table2?GETtext/xml+votable180.050000true2.578683928.15905190.0055555555555555566/526 642 2089 2571 4099 4155 4164 4215 4273 4299 4343 4352 4406 4451 4459 4483 4506 4534 4579 4596 4604 4617 4629 4639 4657 4686 4790 4844 4891 4930 4977 5056 5091 5094 5128 5133 5244 5335 5344 5366 5402 5437 5452 5470 5481 5551 5576 5641 5651 5657 5661 5687 5692 5731 5803 5820 5845 5879 5937-5938 6028 6038 6053 6070 6106 6112 6192 6210 6220 6419 6421 6428 6432 6577 6587 6598 6604 6639 6652 6915 6976 7208 7232 7246 7324 7399 7408 7485 7500 7529 7609 7998 8071 8299 8404 8416 8524 8528 8549 8636 8674 8740-8741 8784 8799 8845 8893 8906 8927 8941 8954 8965 9120 9194 9262 9268 9282 9286 9365 9401 9403 9454 9759 9912 9959 10074 10162 10269 10331 10472 10578 10601 10706 10919 10957-10958 10976 11082 11140 11217 11253 11339 11354 11388 11429 11486 11668 11829 11924 12380 12625 13351 17317 17500 17607 17819 17832 17987 18043 18055 18076 18115-18116 18207 18239 18341 18352 18381 18601 18769 18918 18948 19092 19106 19110 19290 19384 19433 19558 19730 19746 19766 19813 19817 19842 19883 19932 20031 20057 20205 20295 20320 20366 20439 21983 22013 22359 23058 25403 25735 25936 25953 25955 25965 26102-26103 26310 26509 26859 26902 26972 26992 26998 27023 27080 27197 27206 27227 27342 27426 27460 27574 27578 27720 27745 27794 27848 27862 27884 27908 28060 28164 28174 28316 28356 28436 28456 28471 28507 28651 31650 44988 45049 48989 49100 49106https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/950/97?format=asciiUVOpticaldefaultJ/ApJ/950/97/table1Basic properties of the weak emission-line quasar (WLQ) samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of sourcemeta.id;meta.maincharzsys[0.019/3.55] Systemic redshiftsrc.redshiftfloatlogL5100[43.54/47.14] Log monochromatic luminosity at rest-frame 5100{AA}; log{nu}L_{nu}_(5100{AA})log(1e-07W)phys.luminosity;em.optfloatFWHM(Hb)[830/12197] Hbeta emission line FWHMkm/sspect.line.widthintRFeII[0/3.31] Equivalent width of FeII divided by equivalent width of Hbetaarith.difffloatf_RFeII[c] Flag on RFeII (1)meta.codecharSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlcharlogMBH[6.86/10.6] Log black hole mass using traditional estimationlog(solMass)phys.massfloatlogMBHc[6.5/10.32] Log black hole mass using R_FeII_ correctionlog(solMass)phys.massfloatLEdd[0.01/2.8] Eddington luminosity ratio using traditional estimationphys.luminosity;arith.ratiofloatLEddc[0.01/15.1] Eddington luminosity ratio using R_FeII_ correctionphys.luminosity;arith.ratiofloatEWCIV[0.4/290] Rest-frame CIV emission line equivalent width0.1nmspect.line.eqWidthfloate_EWCIV[0/10.1]? Lower uncertainty in EWCIV (2)0.1nmstat.error;stat.min;spect.line.eqWidthfloatnullableE_EWCIV[0/15]? Upper uncertainty in EWCIV (2)0.1nmstat.error;stat.max;spect.line.eqWidthfloatnullableCIVb[-1388/9062] Blueshift of the CIV emission-line peakkm/sspect.dopplerVelocinte_CIVb[0/1977] Lower uncertainty in CIVb (2)km/sstat.error;stat.min;spect.dopplerVelocintE_CIVb[0/4178] Upper uncertainty in CIVb (2)km/sstat.error;stat.max;spect.dopplerVelocintf_CIVb[b] Flag on CIVb (1)meta.codecharRef1[1/9] Source of rest-frame optical data (3)meta.bibintRef2Source(s) of rest-frame UV (CIV) data (3)meta.bibcharGDQSDisplay data from GNIRS-DQS Paper I (Matthews+ 2023, J/ApJ/950/95) and II (Dix+ 2023, J/ApJ/950/96)meta.ref.urlintnullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJ/950/97/table2Basic properties of the ordinary quasar sampleLEddc[0.01/15.1] Eddington luminosity ratio using R_FeII_ correctionphys.luminosity;arith.ratiofloatEWCIV[0.4/290] Rest-frame CIV emission line equivalent width0.1nmspect.line.eqWidthfloate_EWCIV[0/10.1]? Lower uncertainty in EWCIV (2)0.1nmstat.error;stat.min;spect.line.eqWidthfloatnullableE_EWCIV[0/15]? Upper uncertainty in EWCIV (2)0.1nmstat.error;stat.max;spect.line.eqWidthfloatnullableCIVb[-1388/9062] Blueshift of the CIV emission-line peakkm/sspect.dopplerVelocinte_CIVb[0/1977] Lower uncertainty in CIVb (2)km/sstat.error;stat.min;spect.dopplerVelocintE_CIVb[0/4178] Upper uncertainty in CIVb (2)km/sstat.error;stat.max;spect.dopplerVelocintf_CIVb[b] Flag on CIVb (1)meta.codecharSimbadNameSimbad column added by the CDSmeta.idcharnullableNEDNED column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of sourcemeta.id;meta.maincharzsys[0.019/3.55] Systemic redshiftsrc.redshiftfloatlogL5100[43.54/47.14] Log monochromatic luminosity at rest-frame 5100{AA}; log{nu}L_{nu}_(5100{AA})log(1e-07W)phys.luminosity;em.optfloatFWHM(Hb)[830/12197] Hbeta emission line FWHMkm/sspect.line.widthintRFeII[0/3.31] Equivalent width of FeII divided by equivalent width of Hbetaarith.difffloatf_RFeII[c] Flag on RFeII (1)meta.codecharlogMBH[6.86/10.6] Log black hole mass using traditional estimationlog(solMass)phys.massfloatlogMBHc[6.5/10.32] Log black hole mass using R_FeII_ correctionlog(solMass)phys.massfloatLEdd[0.01/2.8] Eddington luminosity ratio using traditional estimationphys.luminosity;arith.ratiofloatRef1[1/9] Source of rest-frame optical data (3)meta.bibintRef2Source(s) of rest-frame UV (CIV) data (3)meta.bibcharGDQSDisplay data from GNIRS-DQS Paper I (Matthews+ 2023, J/ApJ/950/95) and II (Dix+ 2023, J/ApJ/950/96)meta.ref.urlintnullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main