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dc.contributor.authorNeme, Luis Rodolfo Vegapt_BR
dc.contributor.authorAsari, Natalia Valept_BR
dc.contributor.authorFernandes Junior, Roberto Cidpt_BR
dc.contributor.authorGarcia-Rissmann, Aureapt_BR
dc.contributor.authorStorchi-Bergmann, Thaisapt_BR
dc.contributor.authorGonzález Delgado, Rosa M.pt_BR
dc.contributor.authorSchmitt, Henrique Robertopt_BR
dc.date.accessioned2014-04-08T01:49:57Zpt_BR
dc.date.issued2009pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/90449pt_BR
dc.description.abstractIn a former paper, we have presented spectra of 64 active, nine normal and five starburst galaxies in the region around the near-infrared calcium triplet (CaT) absorption lines and the [S III]λ9069 line. In the present paper, we analyse the CaT strength (WCaT) and kinematical products derived in that study, namely stellar (σ) and ionized gas (σgas) velocity dispersions. Our main results may be summarized as follows. (1) Type 2 Seyfert galaxies show no sign of dilution in WCaT with respect to the values spanned by normal galaxies, even when optical absorption lines such as the Ca II K band at 3933 Å are much weaker than in old, bulge-like stellar populations. (2) The location of type 2 Seyfert galaxies in the WCaT–WCaK plane is consistent with evolutionary synthesis models. The implication is that the source responsible for the dilution of optical lines in these active galactic nuclei (AGN) is a young stellar population, rather than an AGN featureless continuum, confirming the conclusion of the pioneer study of Terlevich, Díaz & Terlevich. (3) In type 1 Seyfert galaxies, both W[S III] and WCaT tend to be diluted due to the presence of a non-stellar component, in agreement with the unification paradigm. (4) A comparison of σ with σgas (obtained from the core of the [S III] emitting line) confirms the existence of a correlation between the typical velocities of stars and clouds of the narrow line region. The strength and scatter around this correlation are similar to those previously obtained from the [O III]λ5007 linewidth.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofMonthly notices of the royal astronomical society. Oxford. Vol. 393, no. 3 (Mar. 2009), p. 846-857pt_BR
dc.rightsOpen Accessen
dc.subjectGalaxias elipticaspt_BR
dc.subjectGalaxies: kinematics and dynamicsen
dc.subjectNucleo galaticopt_BR
dc.subjectGalaxies: nucleien
dc.subjectGalaxies: stellar contenten
dc.subjectPopulacoes estelarespt_BR
dc.subjectGalaxias seyfertpt_BR
dc.titleThe CaT strength in Seyfert nuclei revisited : analysing young stars and non-stellar light contributions to the spectrapt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000702963pt_BR
dc.type.originEstrangeiropt_BR


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