J/MNRAS/454/3962ivo://CDS.VizieR/J/MNRAS/454/3962doi:10.26093/cds/vizier.74543962CDSHe Z.-C.Bian W.-H.Ge X.Jiang X.-L.2024-08-15T20:16:17Z2016-09-23T13:08:24ZCDS support team

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

cds-question@unistra.frquasarsspectroscopyline-intensitiesThe variability of broad absorption lines (BALs) is investigated for a sample of 188 BAL quasars (QSOs) (z>1.7) with at least two epoch observations from the Sloan Digital Sky Survey Data Release 7, covering a time-scale of about 0.001-3yr in the rest frame. Considering only the longest time-scale between epochs for each QSO, 73 variable regions in the CIV BAL troughs are detected for 43 BAL QSOs. The proportion of BAL QSOs showing variable regions increases with longer time-interval than about 1 yr in the rest frame. The velocity width of variable regions is narrow compared to the BAL-trough outflow velocity. For 43 BAL QSOs with variable regions, it is found that there is a medium strong correlation between the variation of the continuum luminosity at 1500{AA} and the variation of the spectral index. With respect to the total 188 QSOs, a larger proportion of BAL QSOs with variable regions appears bluer during their brighter phases, which implies that the origin of BAL variable regions is related to the central accretion process. For 43 BAL QSOs with variable regions, it is possible that there is a negative medium strong correlation between the absolute variation of the equivalent width and the Mgii-based black hole mass, and a medium strong correlation between the maximum outflow velocity of variable regions and the Eddington ratio. These results imply a connection between the BAL-trough variation and the central accretion process.2015MNRAS.454.3962Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/454/3962CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/427/107 : Polarization in BAL QSOs (Lamy+, 2004)J/ApJS/165/1 : BAL QSOs from SDSS DR3 (Trump+, 2006)J/ApJ/665/990 : SDSS DR2 BAL QSOs (Ganguly+, 2007)J/ApJ/692/758 : BAL QSOs in SDSS-DR5 (Gibson+, 2009)J/ApJ/696/924 : UV and X-Ray radio-quiet QSOs (Gibson+, 2009)J/MNRAS/410/860 : Redshift dependence of BAL QSOs (Allen+, 2011)J/MNRAS/427/1135 : Properties of radio-loud BAL quasars (DiPompeo+, 2012)J/MNRAS/444/2498 : Radio-Quiet BAL quasars sample (Rochais+, 2014)J/MNRAS/449/1593 : CIV absorption in BAL QSOs (Baskin+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/454/3962https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/454/3962http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/454/3962https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/454/3962https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/454/3962http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/454/3962GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/454/3962/table2 (The properties of 188 BAL QSOs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/454/3962/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/454/3962/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/454/3962/table2?GETtext/xml+votable180.050000true2.87734310.93075140.0055555555555555566/2300 4138 4187 4372 4391 4481 4727 4746 4771 4833 4967 4991 5171 5189 5198 5200 5248 5265 5270 5550 5574 5601 5676 5683 5701 5723 5779 5879 5918 5931 5942 6097 6104 6117 6217 6220 6505 6594 6596 7258 7260 7366 7424 7467 7480 7524 8192 8227-8228 9290 9468 9514 9518 9601 9851 9861 9897 9918 10073 10086 10221-10222 10279 10611 10733 10793 10988 11085 11127 11134 11249 11265 11347 11389 11423 11446 11449 11488 11512 11514 11588 11845 11847 11924 17150 17242 17298 17325 17406-17407 17512 17549 17551 17556 17668 17743 17751 17753-17756 17764 17766-17767 17774 17776-17777 17816 17832 17840 17981 18026 18028 18063 18069 18081 18092 18098 18113 18389 18416 18540 18792 18840 18849 19038 19094 19097 19425 19759-19760 22361 23182 23186 23192 23205 23207 25567 25933 25945 25959 25968-25969 26009-26011 26023 26183 26196 26204 26206 26212 26214 26301 26305 26368 26402 26467 26992 27045 27116 27198 27260 27293 27346 27426 27646 27650 27918 27942 28001 28076 28160 28213 28521 28614 31400 31408 36730 36778 48990-48991 49010 49013https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/454/3962?format=asciiOpticaldefaultJ/MNRAS/454/3962/table2The properties of 188 BAL QSOsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2epindicates two-epoch spectra data in table3meta.ref.urlcharSeqSequential number of BAL QSOmeta.recordintEpEpoch numbermeta.idintSDSSSDSS name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharprimaryzRedshiftsrc.redshiftfloatPMFSDSS Plate-MJD-Fibre of the observationmeta.idcharL1500Luminosity (in 10+40erg/s/{AA})1e+34W.nm**-1phys.luminosityfloate_L1500rms uncertainty on L15001e+34W.nm**-1stat.errorfloatalphaUV spectral indexspect.index;em.UVfloate_alpharms uncertainty on alphastat.error;pos.eq.rafloatEWCIVTotal CIV BAL equivalent width0.1nmspect.line.eqWidthfloate_EWCIVrms uncertainty on EWCIV0.1nmstat.errorfloatSpInteractive spectrum from SDSSmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_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/MNRAS/454/3962/table3The subsample of 43 two-epoch spectra with identified variable BAL regionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNSequential number of the two-epoch spectrameta.recordintSDSSSDSS Name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharzRedshiftsrc.redshiftfloatPMF1Plate-MJD-fibre of one observationmeta.idcharPMF2Plate-MJD-fibre of another observationmeta.idcharlogLbolBolometric luminositylog(1e-07W)phys.luminosityfloatlogMBH? MgII-based black hole masslog(solMass)phys.massfloatnullablee_logMBH? rms uncertainty on logMBHlog(solMass)stat.errorfloatnullableLbol/LEdd? Eddington ratiophys.luminosity;arith.ratiofloatnullableDEWEW difference ({Delta}EW) of all variable BAL regions in two-epoch different spectra0.1nmspect.line.eqWidth;arith.diffe_DEWrms uncertainty on DEW0.1nmstat.errorfloatVmax1First boundary of all variable BAL regions maximum velocitykm/sphys.velocfloatVmin1First boundary of all variable BAL regions minimum velocitykm/sphys.velocfloatVmax2? Second boundary of all variable BAL regions maximum velocitykm/sphys.velocfloatnullableVmin2? Second boundary of all variable BAL regions minimum velocitykm/sphys.velocfloatnullableVmax3? Third boundary of all variable BAL regions maximum velocitykm/sphys.velocfloatnullableVmin3? Third boundary of all variable BAL regions minimum velocitykm/sphys.velocfloatnullableVmax4? Fourth boundary of all variable BAL regions maximum velocitykm/sphys.velocfloatnullableVmin4? Fourth boundary of all variable BAL regions minimum velocitykm/sphys.velocfloatnullableSp1Interactive spectrum from SDSSmeta.ref.urlcharSp2Interactive spectrum from SDSSmeta.ref.urlchar