J/MNRAS/452/2553ivo://CDS.VizieR/J/MNRAS/452/2553doi:10.26093/cds/vizier.74522553CDSJohnson S.D.Chen H.-W.Mulchaey J.S.2024-08-15T20:14:23Z2016-04-01T15:58:19ZCDS support team

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

cds-question@unistra.frquasarsredshiftedspectroscopyPrevious observations of quasar host haloes at z~2 have uncovered large quantities of cool gas that exceed what is found around inactive galaxies of both lower and higher masses. To better understand the source of this excess cool gas, we compiled an exhaustive sample of 195 quasars at z~1 with constraints on chemically enriched, cool gas traced by MgII absorption in background quasar spectra from the Sloan Digital Sky Survey. This quasar sample spans a broad range of luminosities from L_bol_=10^44.4^ to 10^46.8^erg/s and allows an investigation of whether halo gas properties are connected with quasar properties. We find a strong correlation between luminosity and cool gas covering fraction. In particular, low-luminosity quasars exhibit a mean gas covering fraction comparable to inactive galaxies of similar masses, but more luminous quasars exhibit excess cool gas approaching what is reported previously at z~2. Moreover, 30-40 percent of the MgII absorption occurs at radial velocities of |Delta_v_|>300km/s from the quasar, inconsistent with gas bound to a typical quasar host halo. The large velocity offsets and observed luminosity dependence of the cool gas near quasars can be explained if the gas arises from: (1) neighbouring haloes correlated through large-scale structure at Mpc scales, (2) feedback from luminous quasars or (3) debris from the mergers thought to trigger luminous quasars. The first of these scenarios is in tension with the lack of correlation between quasar luminosity and clustering while the latter two make distinct predictions that can be tested with additional observations.2015MNRAS.452.2553Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/452/2553CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/452/2553https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/452/2553http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/452/2553https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/452/2553https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/452/2553http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/452/2553GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/452/2553/table1 (Summary of quasar and absorption properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/452/2553/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/452/2553/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/452/2553/table1?GETtext/xml+votable180.050000true148.727916737.57213890.0055555555555555566/2 2052 4103 4185 4187 4276 4319 4404 4586 4723 4846 4972 5009 5127 5133 5147 5162 5190 5211 5235 5245 5264 5268 5354 5366 5379 5386 5490 5500 5519 5541 5565 5567 5574 5630 5663 5753 5759 5761 5772 5801 5846-5847 5855 5862 5869 5873 5891 5909 5920 5928 5944 5964 6033 6216 6341 6406 6435 6441 6470-6471 6519 6523-6524 6536 6541 6562 6568 6604 6634 7179 7208 7210 7212 7216 7253 7256 7287 7447 7461 8220 8452 8533 8541 8583 8657 8806 8917 9021 9076 9149 9153 9179 9214 9261 9307 9312 9318 9336 9464 9472 9518 9636 9815 9831 9839 9897 9969 9973 10016 10021 10113 10145 10311 10387 10449 10495 10505 10531 10549 10649 10654 10743 10766 10771 10869 10875 10927 10947 10961-10962 11015 11021-11022 11035 11183 11273 11278 11295 11406 11426 11438 11445 11467 11803-11804 11908 11914 11929 11944 12319 16471 17405 17407 17494 17523 17692 17751-17752 17754 17761 17764 17766-17769 17772 17831-17832 17842 17857 17947 17984 17994 18026 18069 18102 18289 18772 18788 18829 19023 19099 19138 19442 19632 19718 19735 19738 19840 19908 20005 20022 20062 20086 20126 20218 20375 20408 21844 23188 25937 25953 26018 26079 26092 26470 26536 27046 27126 27205 27239 27297 27319 27384 27506 27549 27654 27682 27719 27782 27792 27803 27863 27879 28020 28076 28107 28172 28185 28383 28525 28528 28601 30031 31716 35771 46850 46907https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/452/2553?format=asciiOpticaldefaultJ/MNRAS/452/2553/table1Summary of quasar and absorption propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameForeground QSO name (JHHMM+DDMM)meta.id;meta.maincharRAJ2000Foreground QSO Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Foreground QSO Declination (J2000)pos.eq.dec;meta.mainzForeground QSO redshift (1)src.redshiftfloatlogLbolBolometric luminositylog(1e-07W)phys.luminosityfloatdthetaAngular separation between the foreground and background quasarsarcsecpos.angDistancefloatdDistance Projected distance between the foreground and background quasarskpcpos.distanceintl_Wr(2796)Limit flag on Wr(2796) (2)meta.code.errorcharWr(2796)Rest-frame equivalent width of MgII (2796)0.1nmspect.line.eqWidthfloate_Wr(2796)? rms uncertainty on Wr(2796)0.1nmstat.errorfloatnullabledv? Velocity difference between the foreground and background quasarskm/sphys.veloc;arith.diffintnullableRefReference (3)meta.ref;pos.frameint