Type 1 AGN at low z. III. J/MNRAS/431/836 ivo://CDS.VizieR/J/MNRAS/431/836 doi:10.26093/cds/vizier.74310836 CDS Stern J. Laor A. 2024-07-21T20:14:57Z 2014-06-25T15:00:51Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr active-galactic-nuclei seyfert-galaxies spectroscopy We present the optical narrow-line ratios in a Sloan Digital Sky Survey (SDSS) based sample of 3175 broad H{alpha} selected type 1 active galactic nuclei (AGN), and explore their positions in the BPT diagrams as a function of the AGN and the host properties. We find the following: (1) the luminosities of all measured narrow lines (H{alpha}, H{beta}, [OIII], [NII], [SII], [OI]) show a Baldwin relation relative to the broad H{alpha} luminosity LbH{alpha}, with slopes in the range of 0.53-0.72. (2) About 20 percent of the type 1 AGN reside within the "Composite" and "star-forming" (SF) regions of the Baldwin, Phillips & Terlevich (BPT) diagrams. These objects also show excess narrow H{alpha} and ultraviolet (UV) luminosities, for their LbH{alpha}, consistent with contribution from star formation which dominates the narrow-lines emission, as expected from their positions in the BPT diagrams. (3) The type 1 which reside within the AGN region in the BPT diagrams, are offset to lower [SII]/H{alpha} and [NII]/H{alpha} luminosity ratios, compared to type 2 AGN. This offset is a selection effect, related to the lower AGN/host luminosity selection of the type 2 AGN selected from the SDSS galaxy sample. (4) The [NII]/H{alpha} and [NII]/[SII] ratios in type 1 AGN increase with the host mass, as expected if the mass-metallicity relation of quiescent galaxies holds for the AGN narrow-line region (NLR). (5) The broad lines optical Fe ii is higher for a higher [NII]/H{alpha}, at a fixed Lbol and Eddington ratio L/LEdd. This suggests that the broad line region metallicity is also related to the host mass. (6) The fraction of AGN which are low-ionization nuclear emission-line regions (LINERs) increases sharply with decreasing L/LEdd. This fraction is the same for type 1 and type 2 AGN. (7) The BPT position is unaffected by the amount of dust extinction of the optical-UV continuum, which suggests that the extincting dust resides on scales larger than the narrow-line region (NLR). 2013MNRAS.431..836S https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/431/836 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to J/MNRAS/423/600 : Type-1 low-z AGN emission properties (Stern+, 2012) J/MNRAS/426/2703 : Type 1 AGN at low z. II. (Stern+, 2012) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/431/836 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/431/836 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/431/836 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/431/836 https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/431/836 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/431/836 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/MNRAS/431/836/t1sample (AGN and host characteristics (table1) and narrow-line measurements (table2) of the T1 sample) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/431/836/t1sample? https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/431/836/t1sample? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/431/836/t1sample? 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Should Not be used for identification. meta.record int Name Object name (JHHMMSS.ss+DDMMSS.s) meta.id;meta.main char logLbHa ? Broad H{alpha} luminosity (erg/s) log(1e-07W) phys.luminosity;em.line.Halpha float nullable Dv FWHM of the fit ({Delta}v) km/s spect.line.width int l_logM* Limit flag on logM* meta.code.error char logM* ? Stellar mass log(solMass) phys.mass float nullable l_logLUV Limit flag on logLUV meta.code.error char logLUV ? UV luminosity (erg/s) log(1e-07W) phys.luminosity;em.UV float nullable l_alpha Limit flag on alpha meta.code.error;pos.eq.ra char alpha ? Spectra index {alpha}_ox_, optical/x-ray spect.index;em.line.Halpha float nullable l_logLHb Limit flag on LHb meta.code.error char logLHb Luminosity of H{beta} (erg/s) log(1e-07W) phys.luminosity;em.line.Hbeta float l_logL[OIII] Limit flag on L[OIII] meta.code.error char logL[OIII] Luminosity of [OIII] (erg/s) log(1e-07W) phys.luminosity float l_logLHa Limit flag on LHa meta.code.error char logLHa Luminosity of H{alpha} (erg/s) log(1e-07W) phys.luminosity;em.line.Halpha float l_logL[NII] Limit flag on L[NII] meta.code.error char logL[NII] Luminosity of [NII] (erg/s) log(1e-07W) phys.luminosity float l_logL[SII] Limit flag on L[SII] meta.note char logL[SII] ? Luminosity of [SII] (erg/s) (-1 for "bad pixel") log(1e-07W) phys.luminosity float nullable l_logL[OI] Limit flag on L[OI] meta.code.error char logL[OI] ? Luminosity of [OI] (erg/s) (-1 for "bad pixel") log(1e-07W) phys.luminosity float nullable fs [+x] non-robust spectrum flag (1) meta.code char fa [+x] Stellar absorption flag (1) meta.code char BPT-[NII] Classification from [NII] BPT panel (2) src.class char BPT-[SII] Classification from [SII] BPT panel (2) src.class char BPT-[OI] Classification from [OI] BPT panel (2) src.class char P Details from 2012 papers about this source (J/MNRAS/423/600, J/MNRAS/426/2703) meta.ref.url char _RA Position from Name (right ascension part) deg pos.eq.ra;meta.main _DE Position from Name (declination part) deg pos.eq.dec;meta.main