J/ApJ/736/86ivo://CDS.VizieR/J/ApJ/736/86doi:10.26093/cds/vizier.17360086CDSDong X.-B.Wang J.-G.Ho L.C.Wang T.-G.Fan X.Wang H.Zhou H.,Yuan W.2018-01-08T06:38:08Z2013-01-24T13:16:20ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiline-intensitiesspectroscopyultraviolet-astronomygalaxiesvisible-astronomyWe used a large, homogeneous sample of 4178 z<=0.8 Seyfert 1 galaxies and QSOs selected from the Sloan Digital Sky Survey to investigate the strength of FeII emission and its correlation with other emission lines and physical parameters of active galactic nuclei. We find that the strongest correlations of almost all the emission-line intensity ratios and equivalent widths (EWs) are with the Eddington ratio (L/L_Edd_), rather than with the continuum luminosity at 5100{AA} (L_5100_) or black hole mass (M_BH_); the only exception is the EW of ultraviolet FeII emission, which does not correlate at all with broad-line width, L_5100_, M_BH_, or L/L_Edd_. By contrast, the intensity ratios of both the ultraviolet and optical FeII emission to MgII{lambda}2800 correlate quite strongly with L/L_Edd_. Interestingly, among all the emission lines in the near-UV and optical studied in this paper (including MgII{lambda}2800, H{beta}, and [OIII]{lambda}5007), the EW of narrow optical FeII emission has the strongest correlation with L/L_Edd_. We hypothesize that the variation of the emission-line strength in active galaxies is regulated by L/L_Edd_ because it governs the global distribution of the hydrogen column density of the clouds gravitationally bound in the line-emitting region, as well as its overall gas supply. The systematic dependence on L/L_Edd_ must be corrected when using the FeII/MgII intensity ratio as a measure of the Fe/Mg abundance ratio to study the history of chemical evolution in QSO environments.2011ApJ...736...86Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/736/86CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)J/other/RMxAA/47.361 : AGN activity in isolated SDSS galaxies (Coziol+, 2011)J/ApJ/692/758 : BAL QSOs in SDSS-DR5 (Gibson+, 2009)J/MNRAS/354/L25 : MgII absorbers in SDSS QSOs (Bouche+, 2004)J/AJ/124/3042 : Seyfert 1 galaxies from SDSS EDR (Williams+, 2002)J/ApJS/143/257 : AGN emission line properties (Kuraszkiewicz+, 2002)http://www.sdss.org/ : SDSS home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/736/86https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/736/86http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/736/86https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/736/86https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/736/86http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/736/86GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/736/86/table1 (Optical continuum and emission-line parameters of the full sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/736/86/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/736/86/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/736/86/table1?GETtext/xml+votable180.050000true0.04983330.04033330.005555555555555556Cone search capability for table J/ApJ/736/86/table2 (Near-UV continuum and emission-line parameters of the UV subsample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/736/86/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/736/86/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/736/86/table2?GETtext/xml+votable180.050000true0.04983330.04033330.0055555555555555565/1026 1040 1058 1060 1250 1252 1342 1366 1386 1390 1391 1392 1439 1463 1478 1482 1486 1498 1499 1530 1558 1561 1611 1621 1623 1633 1651 1657 1793 1795 1801 1805 1806 1809 1810 1818 1821 1825 1873 1876 2267 2333 2359 2364 2438 2471 2485 2499 2637 2645 2650 2741 2744 2778 2779 2820 2838 2848 2851 2856 2864 2868 2875 2951 2959 2961 4390 4502 4997 5762 5764 6461 6462 6556 6557 6577 6579 6584 6738 6741 6742 6749 6768 6770 6777 6829 6834 6835 6837 6844 6849 6913 6934 6956 7510 9195 11263 6/0 526 544 552 553 640 4097 4098 4099 4100 4101 4109 4110 4111 4112 4113 4116 4118 4119 4123 4127 4128 4130 4131 4133 4139 4141 4142 4143 4145 4148 4154 4158 4167 4171 4172 4173 4176 4179 4183 4184 4186 4187 4189 4193 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36788 36789 36790 36792 36793 36802 36803 36804 36806 36808 36810 36816 36863 45046 49009 49011 49013 49014 49015 49017 49018 49019 49020 49087 49091 49092 49094 49095 49098 49099 49100 49101 49104 49106 49124 49130https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/736/86?format=asciiUVOpticaldefaultJ/ApJ/736/86/table1Optical continuum and emission-line parameters of the full sampleSDSScCorrected SDSS name, as in SDSS-DR7 or -DR8meta.id;meta.maincharprimaryl_W(FeIIn)Limit flag on W(FeIIn)meta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintUSimbad column added by the CDSmeta.ref.urlcharSDSSSDSS name (JHHMMSS.ss+DDMMSS.s)meta.idcharz[0.02/0.8] SDSS redshiftsrc.redshiftfloatlogL510[42.83/46.09] Log luminosity at 5100{AA} (1)log(1e-07W)phys.luminosityfloatbeta[-2.5/0.88] Local continuum slope {beta} (2)spect.indexfloatFWHM(Hb)[999/19251] FWHM of broad H{beta} (3)km/sspect.line.widthintl_logFeIInLimit flag on logFeIInmeta.code.errorcharlogFeIInLog of narrow FeII 4570{AA} line flux (4)log(mW.m**-2)phot.flux;spect.linefloatW(FeIIn)Rest-frame narrow FeII 4570{AA} equivalent width (5)0.1nmspect.line.eqWidthfloatl_logFeIIbLimit flag on logFeIIbmeta.code.errorcharlogFeIIbLog of broad FeII 4570{AA} line flux (4)log(mW.m**-2)phot.flux;spect.linefloatl_W(FeIIb)Limit flag on W(FeIIb)meta.code.errorcharW(FeIIb)Rest-frame broad FeII 4570{AA} equivalent width (5)0.1nmspect.line.eqWidthfloatlogHb.n? Log of narrow H{beta} line flux (6)log(mW.m**-2)phot.flux;em.line.Hbeta;spect.linefloatnullablelogHb.bLog of broad H{beta} line flux (6)log(mW.m**-2)phot.flux;em.line.Hbeta;spect.linefloatW(Hb.b)Rest-frame broad H{beta} equivalent width (5)0.1nmspect.line.eqWidth;em.line.Hbetafloatl_logOIIILimit flag on logOIIImeta.code.errorcharlogOIIILog of [OIII] 5007{AA} line flux (6)log(mW.m**-2)phot.flux;em.line.OIII;spect.linefloatl_W(OIII)Limit flag on W(OIII)meta.code.errorcharW(OIII)Rest-frame [OIII] 5007{AA} EW (5)0.1nmspect.line.eqWidth;em.line.OIIIfloatDR4+7Display the SDSS-DR4, -DR7, DR8 photometric catalogs within 1"meta.ref.urlcharSloanDisplay the SDSS online data for this AGNmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refchar_RAPositions from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPositions from SDSS name (declination part)degpos.eq.dec;meta.mainJ/ApJ/736/86/table2Near-UV continuum and emission-line parameters of the UV subsampleSDSScSimbad column added by the CDSmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS name (JHHMMSS.ss+DDMMSS.s)meta.idcharlogL300[44.3/46.41] Log luminosity at 3000{AA} (1)log(1e-07W)phys.luminosityfloatFWHM(Mg)[891/14316] FWHM of broad MgII 2800{AA} (2)km/sspect.line.widthintl_logFeIILimit flag on logFeIImeta.code.errorcharlogFeII[-14.34/-12.3] Log of UV FeII emission (3)log(mW.m**-2)phot.fluxfloatl_W(FeII)Limit flag on W(FeII)meta.code.errorcharW(FeII)Rest-frame UV FeII equivalent width (4)0.1nmspect.line.eqWidth;em.UVfloatlogMgIInLog of narrow MgII 2800{AA} line flux (5)log(mW.m**-2)phot.flux;spect.linefloatlogMgIIbLog of broad MgII 2800{AA} line flux (5)log(mW.m**-2)phot.flux;spect.linefloatW(MgIIb)Rest-frame MgII 2800{AA} equivalent width (4)0.1nmspect.line.eqWidthfloat_RAPositions from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPositions from SDSS name (declination part)degpos.eq.dec;meta.main