The CaT strength in Seyfert nuclei revisited : analysing young stars and non-stellar light contributions to the spectra
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/90449 |
Resumo: | In 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. |
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Neme, Luis Rodolfo VegaAsari, Natalia ValeFernandes Junior, Roberto CidGarcia-Rissmann, AureaStorchi-Bergmann, ThaisaGonzález Delgado, Rosa M.Schmitt, Henrique Roberto2014-04-08T01:49:57Z20090035-8711http://hdl.handle.net/10183/90449000702963In 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.application/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 393, no. 3 (Mar. 2009), p. 846-857Galaxias elipticasNucleo galaticoPopulacoes estelaresGalaxias seyfertGalaxies: kinematics and dynamicsGalaxies: nucleiGalaxies: stellar contentThe CaT strength in Seyfert nuclei revisited : analysing young stars and non-stellar light contributions to the spectraEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000702963.pdf000702963.pdfTexto completo (inglês)application/pdf934564http://www.lume.ufrgs.br/bitstream/10183/90449/1/000702963.pdf866b76c706794fb5e6a2b9a1c43c9d76MD51TEXT000702963.pdf.txt000702963.pdf.txtExtracted Texttext/plain66953http://www.lume.ufrgs.br/bitstream/10183/90449/2/000702963.pdf.txt622b5f9a166fd20c6c8e8453fe1a7142MD52THUMBNAIL000702963.pdf.jpg000702963.pdf.jpgGenerated Thumbnailimage/jpeg2261http://www.lume.ufrgs.br/bitstream/10183/90449/3/000702963.pdf.jpgf2ca3469aaa20d3df030f3a238bed419MD5310183/904492018-10-18 09:19:54.354oai:www.lume.ufrgs.br:10183/90449Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-18T12:19:54Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
The CaT strength in Seyfert nuclei revisited : analysing young stars and non-stellar light contributions to the spectra |
title |
The CaT strength in Seyfert nuclei revisited : analysing young stars and non-stellar light contributions to the spectra |
spellingShingle |
The CaT strength in Seyfert nuclei revisited : analysing young stars and non-stellar light contributions to the spectra Neme, Luis Rodolfo Vega Galaxias elipticas Nucleo galatico Populacoes estelares Galaxias seyfert Galaxies: kinematics and dynamics Galaxies: nuclei Galaxies: stellar content |
title_short |
The CaT strength in Seyfert nuclei revisited : analysing young stars and non-stellar light contributions to the spectra |
title_full |
The CaT strength in Seyfert nuclei revisited : analysing young stars and non-stellar light contributions to the spectra |
title_fullStr |
The CaT strength in Seyfert nuclei revisited : analysing young stars and non-stellar light contributions to the spectra |
title_full_unstemmed |
The CaT strength in Seyfert nuclei revisited : analysing young stars and non-stellar light contributions to the spectra |
title_sort |
The CaT strength in Seyfert nuclei revisited : analysing young stars and non-stellar light contributions to the spectra |
author |
Neme, Luis Rodolfo Vega |
author_facet |
Neme, Luis Rodolfo Vega Asari, Natalia Vale Fernandes Junior, Roberto Cid Garcia-Rissmann, Aurea Storchi-Bergmann, Thaisa González Delgado, Rosa M. Schmitt, Henrique Roberto |
author_role |
author |
author2 |
Asari, Natalia Vale Fernandes Junior, Roberto Cid Garcia-Rissmann, Aurea Storchi-Bergmann, Thaisa González Delgado, Rosa M. Schmitt, Henrique Roberto |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Neme, Luis Rodolfo Vega Asari, Natalia Vale Fernandes Junior, Roberto Cid Garcia-Rissmann, Aurea Storchi-Bergmann, Thaisa González Delgado, Rosa M. Schmitt, Henrique Roberto |
dc.subject.por.fl_str_mv |
Galaxias elipticas Nucleo galatico Populacoes estelares Galaxias seyfert |
topic |
Galaxias elipticas Nucleo galatico Populacoes estelares Galaxias seyfert Galaxies: kinematics and dynamics Galaxies: nuclei Galaxies: stellar content |
dc.subject.eng.fl_str_mv |
Galaxies: kinematics and dynamics Galaxies: nuclei Galaxies: stellar content |
description |
In 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. |
publishDate |
2009 |
dc.date.issued.fl_str_mv |
2009 |
dc.date.accessioned.fl_str_mv |
2014-04-08T01:49:57Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/90449 |
dc.identifier.issn.pt_BR.fl_str_mv |
0035-8711 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000702963 |
identifier_str_mv |
0035-8711 000702963 |
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http://hdl.handle.net/10183/90449 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Monthly notices of the royal astronomical society. Oxford. Vol. 393, no. 3 (Mar. 2009), p. 846-857 |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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