J/MNRAS/469/3163ivo://CDS.VizieR/J/MNRAS/469/3163doi:10.26093/cds/vizier.74693163CDSMcGraw S.M.Brandt W.N.Grier C.J.Filiz Ak N.Hall P.B.,Schneider D.P.Anderson S.F.Green P.J.Hutchinson T.A.Macleod C.L.,Vivek M.2024-08-17T20:19:17Z2020-05-14T08:37:37ZCDS support team

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

cds-question@unistra.frquasarsactive-galactic-nucleiradial-velocityline-intensitiesWe investigate broad absorption line (BAL) disappearance and emergence using a 470 BAL-quasar sample over <=0.10-5.25 rest-frame years with at least three spectroscopic epochs for each quasar from the Sloan Digital Sky Survey. We identify 14 disappearing BALs over <=1.73-4.62 rest-frame years and 18 emerging BALs over <=1.46-3.66 rest-frame years associated with the CIV{lambda}{lambda}1548,1550 and/or SiIV{lambda}{lambda}1393,1402 doublets, and report on their variability behaviour. BAL quasars in our data set exhibit disappearing/emerging C IV BALs at a rate of 2.3^+0.9^_-0.7_ and 3.0^+1.0^_-0.8_ per cent, respectively, and the frequency for BAL to non-BAL quasar transitions is 1.7^+0.8^_-0.6_ per cent. We detect four re-emerging BALs over <=3.88 rest-frame years on average and three re-disappearing BALs over <=4.15 rest-frame years on average, the first reported cases of these types. We infer BAL lifetimes along the line of sight to be nominally <=100-1000yr using disappearing CIV BALs in our sample. Interpretations of (re-)emerging and (re-)disappearing BALs reveal evidence that collectively supports both transverse-motion and ionization-change scenarios to explain BAL variations. We constrain a nominal CIV/SiIV BAL-outflow location of <=100pc from the central source and a radial size of >=1x10^-7^pc (0.02au) using the ionization-change scenario, and constrain a nominal outflow location of <=0.5pc and a transverse size of ~0.01pc using the transverse-motion scenario. Our findings are consistent with previous work, and provide evidence in support of BALs tracing compact flow geometries with small filling factors.2017MNRAS.469.3163Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/469/3163CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/405/2302 : Improved redshifts for SDSS quasar spectra (Hewett+, 2010)J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/469/3163https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/469/3163http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/469/3163https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/469/3163https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/469/3163http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/469/3163GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/469/3163/table1 (BAL measurements and associated observations of 470 QSOs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/469/3163/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/469/3163/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/469/3163/table1?GETtext/xml+votable180.050000true2.30370830.08455560.0055555555555555565/1814 6/0 2 4105 4111 4138 4167 4727 4754 4833 4932 4991 5080 5082 5084 5099 5101 5112 5117 5270 5327 5333 5335 5340 5352 5354 5360-5361 5403 5441 5444 5448-5449 5451 5457-5458 5463-5464 5483 5490 5500 5517-5519 5527-5528 5530 5542 5559 5564 5574-5576 5584-5585 5598 5601 5611 5613 5615 5623 5627 5630 5654 5659-5660 5676 5681 5683-5684 5686 5698 5701 5707 5712 5714 5721 5723 5731 5738 5748-5749 5752 5761 5764 5766 5768 5772 5777 5779 5784-5785 5787 5795 5798 5807-5809 5819 5822 5829 5834 5843 5849 5853 5861 5863 5867 5879 5882 5886 5897 5902 5912 5915-5916 5931 5938 5942 5945 5955 5970 5973-5974 5977 5979 5987 5991 5995 6018 6022-6023 6027 6036 6038 6041 6044 6048 6051 6067 6075 6080 6085 6090 6092-6093 6097-6098 6117 6137 6455 6468 6479-6480 6485 6487 6491 6496 6502 6506 6513 6517-6518 6526 6548-6549 6559 6568 6586 6588 6594-6596 6599 6606-6607 6610 6618 6620 6640 6642 6644 6648 6652 6928 6992 7173 7178 7182 7186 7190 7194 7199 7219 7225 7227 7229-7230 7233 7237 7241 7246 7260-7262 7267 7269 7277-7278 7281 7288 7301 7318 7328 7352 7365-7367 7424 7457 7460 7467 7480 7524 8192 9211 9290 9733 10019 10027 10144 10152 10337 10438 10492 10544 10548 10559 10597 10601-10602 10604 10607 10623 10635 10658 10685 10687-10688 10706 10715 10717-10719 10721 10723 10729-10730 10760 10793 10795 10810 10812 10853 10855 10880 10882 10887 10900 10902 10916 10922 10935 10940 10950 10953 10957 10961 10966 10968-10969 10971 10983 10987-10988 10998 11003 11005 11023 11027 11036 11042 11047 11057 11062 11079-11080 11084-11086 11134 11147 11169 11265-11266 11272 11274 11301 11308 11318 11320 11328 11393 11398 11400 11425-11426 11514 11779 11789 11847 17407 17668 17727 17743 17746-17747 17751 17754-17757 17764 17766-17767 17774 17776-17777 17816 17821 17828 17830 17832 17857 17997 18004 18007 18019-18020 18025-18028 18063 18069 18076-18077 18086-18087 18089 18092 18098 18113-18114 18749 18772 18781-18782 18792 18849 19038 19094 19097 19691 19759 21852 25934 25941 25948 25969 26010-26011 26023 26193 26196 26200 26206 26212-26214 26217 26228 26236 26238 26305 26331 26353 26368 26977 26986 27025 27198 27260 27293 27363 27543 27697 27918-27919 27942 28160 28607 28629 28636-28637 28639 28655 28658-28659 28663 31388 31400 31408 31452 32423https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/469/3163?format=asciidefaultJ/MNRAS/469/3163/table1BAL measurements and associated observations of 470 QSOsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintT2indicates disappearing and emerging BALs properties in table2meta.ref.urlcharNameBAL quasar name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharprimaryPMFPlate-MJD-Fiber number for the associated SDSS spectrummeta.idcharVminMinimum BAL velocity (1)km/sphys.veloc;stat.minintVmaxMaximum BAL velocity (1)km/sphys.veloc;stat.maxintBIBalnicity indexkm/smeta.code;spect.indexintEWRest-frame equivalent width0.1nmspect.line.eqWidthfloatSpInteractive spectrum from SDSSmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition from Name (right ascension part)degpos.eq.ra;meta.main_DEPosition from Name (declination part)degpos.eq.dec;meta.mainJ/MNRAS/469/3163/table2Properties of BAL quasars with pristine disappearing and emerging BALsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFlag[DE] Disappearing (D) or Emerging (E) BALsmeta.code.errorcharNameBAL-quasar name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharn_Name[BW ] Note on Name (1)meta.notecharzEmission-line redshift (Hewett & Wild, 2010, Cat. J/MNRAS/405/2302)src.redshiftfloatiMAGAbsolute i-band magnitude corrected to z=2 (Shen et al. 2011)magphys.magAbsfloatlogLbolBolometric luminosity (Shen et al., 2011, Cat. J/ApJS/194/45)log(1e-07W)phys.luminosityfloatlogMass? SMBH mass (Shen et al., 2011, Cat. J/ApJS/194/45)log(solMass)phys.massfloatnullablelogLbol/LEdd? Eddington ratio (Shen et al., 2011, Cat. J/ApJS/194/45)phys.luminosity;arith.ratiofloatnullableRRadio-loudness parameter (R=f_6cm_/f_2500A_; Shen et al., 2011, Cat. J/ApJS/194/45) (2)phot.flux;arith.ratiointvBALDisappearing/emerging BAL velocity (see Section 3.2) (3)km/sphys.velocintBIDisappearing/emerging balnicity index (see Section 3.2) (3)km/smeta.code;spect.indexintDEWDisappearing/emerging change in EW (see Section 4.1)0.1nmarith.rate;spect.line.eqWidthDEW/EWDisappearing/emerging change in fractional EW (see Section 4.1)arith.rate;spect.line.eqWidth;arith.ratioIonAssociated ion(s) of the disappearing/emerging BAL(s)phys.atmol.ionStagechar