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dc.contributor.authorLandt, Herminept_BR
dc.contributor.authorWard, Martin Johnpt_BR
dc.contributor.authorBaloković, Mislavpt_BR
dc.contributor.authorKynoch, Danielpt_BR
dc.contributor.authorStorchi-Bergmann, Thaisapt_BR
dc.contributor.authorBoisson, Catherinept_BR
dc.contributor.authorDone, Chrispt_BR
dc.contributor.authorSchimoia, Jáderson da Silvapt_BR
dc.contributor.authorStern, Danielpt_BR
dc.date.accessioned2017-08-09T02:35:35Zpt_BR
dc.date.issued2017pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/164963pt_BR
dc.description.abstractNarrow-line Seyfert 1 galaxies have been identified by the Fermi Gamma-Ray Space Telescope as a rare class of γ -ray emitting active galactic nuclei. The lowest redshift candidate among them is the source 1H 0323+342. Here we present quasi-simultaneous Gemini near-infrared and Keck optical spectroscopy for it, from which we derive a black hole mass based on both the broad Balmer and Paschen emission lines. We supplement these observations with a Nuclear Spectroscopic Telescope Array X-ray spectrum taken about two years earlier, from which we constrain the black hole mass based on the short time-scale spectral variability. Our multiwavelength observations suggest a black hole mass of ∼2 × 107 M , which agrees well with previous estimates. We build the spectral energy distribution and show that it is dominated by the thermal and reprocessed emission from the accretion disc rather than the non-thermal jet component. A detailed spectral fitting with the energy-conserving accretion disc model of Done et al. constrains the Eddington ratio to L/LEdd ∼ 0.5 for a (non-rotating) Schwarzschild black hole and to L/LEdd ∼ 1 for a Kerr black hole with dimensionless spin of a = 0.8. Higher spin values and so higher Eddington ratios are excluded, since they would strongly overpredict the observed soft X-ray flux.pt_BR
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofMonthly notices of the Royal Astronomical Society. Oxford. Vol. 464, no. 3 (Jan. 2017), p. 2565-2576pt_BR
dc.rightsOpen Accessen
dc.subjectQuasars: emission linesen
dc.subjectGaláxias ativaspt_BR
dc.subjectQuasarspt_BR
dc.subjectQuasars: individual: 1H 0323+342en
dc.subjectGalaxias seyfertpt_BR
dc.subjectGalaxies: Seyferten
dc.subjectInfrared: galaxiesen
dc.subjectBuracos negrospt_BR
dc.subjectEspectroscopia infravermelhapt_BR
dc.subjectX-rays: galaxiesen
dc.subjectEspectroscopia oticapt_BR
dc.subjectDeslocamento para o vermelhopt_BR
dc.titleOn the black hole mass of the γ-ray emitting narrow-line Seyfert 1 galaxy 1H 0323+342pt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001021547pt_BR
dc.type.originEstrangeiropt_BR


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