J/MNRAS/487/3305ivo://CDS.VizieR/J/MNRAS/487/3305doi:10.26093/cds/vizier.74873305CDSMeyer R.A.Bosman S.E.I.Ellis R.S.2024-08-19T20:19:00Z2023-01-16T15:00:39ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiquasarsredshiftedultraviolet-astronomyWe present the results of a model-independent investigation of the rest-frame UV spectra from a comprehensive sample of 394 quasars in the redshift range 1.5=<z=<7.5. We fit the main broad emission lines (BELs) in the rest-frame range 1280{AA}=<{lambda}=<3000{AA} (OI, CII, SiIV, CIII, CIV, and MgII) with a lightly supervised spline fitting technique. Redshifts are derived from the peaks of each fitted BEL and used to compute relative velocity shifts. We show that our method gives unbiased velocity shifts and is insensitive to spectral resolution and instrumental parameters. It is found that the average blueshift of the CIV line with respect to several low-ionization lines in luminosity-matched samples does not significantly evolve over 1.5=<z=<6. However, the average blueshift increases significantly by a factor of ~2.5 at z>~6. We propose that this redshift evolution can be explained by CIV winds launched perpendicularly to an accretion disc with increased torus opacity at high redshift, coupled with a potential orientation-driven selection bias. Our results open new exciting avenues of investigation into young quasars in the reionization epoch.2019MNRAS.487.3305Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/487/3305CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)VII/279 : SDSS quasar catalog: twelfth data release (Paris+, 2017)J/MNRAS/445/1745 : Giant Gemini GMOS survey. I. (Worseck+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/487/3305https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/487/3305http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/487/3305https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/487/3305https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/487/3305http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/487/3305GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/487/3305/sdssz (BEL-based redshifts for SDSS Quasars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/487/3305/sdssz?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/487/3305/sdssz?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/487/3305/sdssz?GETtext/xml+votable180.050000true176.001891112.97570610.005555555555555556Cone search capability for table J/MNRAS/487/3305/xq100z (BEL-based redshifts for XQ100 Quasars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/487/3305/xq100z?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/487/3305/xq100z?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/487/3305/xq100z?GETtext/xml+votable180.050000true0.8456383-26.05508440.005555555555555556Cone search capability for table J/MNRAS/487/3305/z6z (BEL-based redshifts for z6 Quasars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/487/3305/z6z?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/487/3305/z6z?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/487/3305/z6z?GETtext/xml+votable180.050000true27.15682926.00555830.005555555555555556Cone search capability for table J/MNRAS/487/3305/z7z (BEL-based redshifts for z7 Quasars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/487/3305/z7z?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/487/3305/z7z?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/487/3305/z7z?GETtext/xml+votable180.050000true357.1389667-30.9028750.0055555555555555566/514 592 2187 4169 4177 4227 4233 4263 4267 4286 4302 4325 4347 4363 4369 4381 4470 4507 4561 4616 4648 4662 4732 4761 4802 4811 4865 4916 4975 4980 5035 5124 5162 5239 5280 5292 5349 5378 5401 5418 5458 5578 5787 5843 5846 5877 6219 6426 6562 6648 7288 7367 7472 7500 8215 8218 8276-8277 8299 8323 8344-8345 8627 8717 8719 8758 8765 8825 8841 8910 9006 9058 9094 9221 9231 9286 9314 9367 10281 10313 10491 10494 10556 10567 10607 10769 10816 10839 10937 11084 11092 11390 11792 11794 11934 12576 13418 16417 16531 16589 16656 16666 16894 17300 17679 17735 17751 17818 17872 18007 18200 18209 18242 18381 18414 18466 18499 18642 19087 19490 19759 21872 21885 22361 25330 25597 25827 25863 25953 26037 26092 26167 26182 26233 26239 26264 26270 26369 26375 26461 26470 26492 26520 26524 26540 26560 26596 26846 26882 26976 27041 27057 27062 27081 27083 27124 27232 27286 27365 27436 27440 27445 27463 27484 27498 27511 27524 27542 27588 27611 27646 27676 27726 27790 27815 27831 27846 27917 27989 27999 28070 28114 28171 28173 28197 28283 28312 28332 28353 28434 28464 28477 28622 28648 30836 31313 31453 31466 31625 31640 31659 31706 32466 33746 34262 34271 34375 34809 34850 35002 35241 35727 35759 35764 35770 35895 36217 36271 36466 36792 36834 37533 43983 44429 44463 45460https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/487/3305?format=asciiUVdefaultJ/MNRAS/487/3305/sdsszBEL-based redshifts for SDSS QuasarsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSDSS spectroscopic Plate-MJD-Fiber identifiermeta.id;meta.maincharzOI? OI-based redshiftsrc.redshift;pos.heliocentricfloatnullablezCII? CII-based redshiftsrc.redshift;pos.heliocentricfloatnullablezSiIV? SiIV-based redshiftsrc.redshift;pos.heliocentricfloatnullablezCIV? CIV-based redshiftsrc.redshift;pos.heliocentricfloatnullablezCIII? CIII-based redshiftsrc.redshift;pos.heliocentricfloatnullablezMgII? MgII-based redshiftsrc.redshift;pos.heliocentricfloatnullable_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/487/3305/xq100zBEL-based redshifts for XQ100 QuasarsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameQuasar namemeta.id;meta.maincharzOI? OI-based redshiftsrc.redshift;pos.heliocentricfloatnullablezCII? CII-based redshiftsrc.redshift;pos.heliocentricfloatnullablezSiIV? SiIV-based redshiftsrc.redshift;pos.heliocentricfloatnullablezCIV? CIV-based redshiftsrc.redshift;pos.heliocentricfloatnullablezCIII? CIII-based redshiftsrc.redshift;pos.heliocentricfloatnullablezMgII? MgII-based redshiftsrc.redshift;pos.heliocentricfloatnullable_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/487/3305/gggzBEL-based redshifts for GGG QuasarsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameQuasar name (SDSSJHHMM+DDMM)meta.id;meta.maincharzOI? OI-based redshiftsrc.redshift;pos.heliocentricfloatnullablezCII? CII-based redshiftsrc.redshift;pos.heliocentricfloatnullablezSiIV? SiIV-based redshiftsrc.redshift;pos.heliocentricfloatnullablezCIV? CIV-based redshiftsrc.redshift;pos.heliocentricfloatnullableJ/MNRAS/487/3305/z6zBEL-based redshifts for z6 QuasarszMgII? MgII-based redshiftsrc.redshift;pos.heliocentricfloatnullable_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.mainSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameQuasar name, JHHMM+DDMM (QSO JHHMM+DDMM in Simbad)meta.id;meta.maincharzOI? OI-based redshiftsrc.redshift;pos.heliocentricfloatnullablezCII? CII-based redshiftsrc.redshift;pos.heliocentricfloatnullablezSiIV? SiIV-based redshiftsrc.redshift;pos.heliocentricfloatnullablezCIV? CIV-based redshiftsrc.redshift;pos.heliocentricfloatnullablezCIIICIII-based redshiftsrc.redshift;pos.heliocentricfloatJ/MNRAS/487/3305/z7zBEL-based redshifts for z7 QuasarsSimbadNameSimbad column added by the CDSmeta.idcharnullablezCIII? CIII-based redshiftsrc.redshift;pos.heliocentricfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameQuasar namemeta.id;meta.maincharzOI? OI-based redshiftsrc.redshift;pos.heliocentricfloatnullablezCII? CII-based redshiftsrc.redshift;pos.heliocentricfloatnullablezSiIVSiIV-based redshiftsrc.redshift;pos.heliocentricfloatzCIVCIV-based redshiftsrc.redshift;pos.heliocentricfloatzMgII? MgII-based redshiftsrc.redshift;pos.heliocentricfloatnullable_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