J/ApJ/693/1554ivo://CDS.VizieR/J/ApJ/693/1554doi:10.26093/cds/vizier.16931554CDSForeman G.Volonteri M.Dotti M.2017-11-06T12:23:57Z2011-04-07T07:54:00ZCDS support team

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

cds-question@unistra.frquasarsredshiftedWe analyze the available sample of double quasars, and investigate their physical properties. Our sample comprises 85 pairs, selected from the Sloan Digital Sky Survey (SDSS). We derive physical parameters for the engine and the host, and model the dynamical evolution of the pair. First, we compare different scaling relationships between massive black holes and their hosts (bulge mass, velocity dispersion, and their possible redshift dependences), and discuss their consistency. We then compute dynamical friction timescales for the double quasar systems to investigate their frequency and their agreement with the "merger driven" scenario for quasar triggering.2009ApJ...693.1554Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/693/1554CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)VII/241 : The 2dF QSO Redshift Survey (Croom+ 2004)J/ApJS/180/67 : Photometric selection of quasars from SDSS. II. (Richards+,J/MNRAS/392/1539 : Metal absorption systems in pairs of QSOs (Tytler+, 2009)J/ApJS/175/29 : Spectroscopy of QSO pairs (Marble+, 2008)J/MNRAS/391/1457 : Lyman{alpha} forest in QSO pairs (Kirkman+, 2008)J/ApJ/678/635 : Spectroscopy of quasar binary candidates (Myers+, 2008)J/ApJ/658/99 : Pairs of QSO in SDSS-DR4 (Myers+, 2007)J/AJ/131/1 : Binary quasars in the SDSS (Hennawi+, 2006)J/ApJS/155/257 : NBC Quasar Candidate Catalog (Richards+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/693/1554https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/693/1554http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/693/1554https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/693/1554https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/693/1554http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/693/1554GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/693/1554/table1 (Properties of the double quasar sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/693/1554/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/693/1554/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/693/1554/table1?GETtext/xml+votable180.050000true170.0100567.17115560.0055555555555555566/0 2207 4166 4781 4819 4997 5008 5372 5439 5733 6085 6243 6578 7225 7424 7466 7468 7536 7540 8330 8352 8922 9098 9168 9320 9359 9458 9978 10189 10396 10555 10698 11064 11188 11228 11341 11456 11514 11814 11905 16893 17577 17746 17749 17756 17820 17836 18012 18092 18766 19424 19426 23144 25852 25997 26187 26253 26277 26279 26286 26485 26489 26555 26962 26964 26987 27021 27031 27104 27251 27305 27359 27393 27434 27446 27447 27544 27790 27852 27865 32395 32497 36725 49015https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/693/1554?format=asciiOpticaldefaultJ/ApJ/693/1554/table1Properties of the double quasar samplezPair redshiftsrc.redshiftfloatSloanDisplay the SDSS data for this quasarmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCatCatalog: SDSS or 2QZmeta.notecharNameName of the pair (JHHMM+DDMM)meta.id;meta.maincharr_zReference(s) for the photometric or spectroscopic information (1)meta.ref;pos.framecharRmaxPhysical separation between the two quasarskpcpos.angDistancefloatLB1QSO1 luminosity (in 10^12^{sun})TsolLumphys.luminosityfloate_LB1LB1 uncertainty (in 10^12^{sun})TsolLumstat.errorfloatLB2QSO2 luminosity (in 10^12^{sun})TsolLumphys.luminosityfloate_LB2LB2 uncertainty (in 10^12^{sun})TsolLumstat.errorfloatMbh1BH mass for QSO1 (in 10^9^{sun})GsolMassphys.massfloatE_Mbh1Positive error on Mbh1 (in 10^9^{sun})GsolMassstat.error;stat.maxfloate_Mbh1Negative error on Mbh1 (in 10^9^{sun})GsolMassstat.errorfloatMbh2BH mass for QSO2 (in 10^9^{sun})GsolMassphys.massfloatE_Mbh2Positive error on Mbh2 (in 10^9^{sun})GsolMassstat.error;stat.maxfloate_Mbh2Negative error on BHMass2 (in 10^9^{sun})GsolMassstat.errorfloatSimbadNameSimbad column added by the CDSmeta.idcharRefDetails from Hennawi et al. 2006, Cat. J/AJ/131/1 ([HSO2006]), Myers et al., 2008, Cat. J/ApJ/678/635 ([MRB2008]), Myers et al. 2007, Cat. J/ApJ/658/99 or Richards et al. 2009, Cat. J/ApJS/180/67meta.ref.urlchar_RAPositions from Simbad or from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPositions from Simbad or from SDSS name (declination part)degpos.eq.dec;meta.main