The first detection of near-infrared CN bands in active galactic nuclei : signature of star formation

Detalhes bibliográficos
Autor(a) principal: Riffel, Rogemar André
Data de Publicação: 2007
Outros Autores: Pastoriza, Miriani Griselda, Rodriguez-Ardila, Alberto, Maraston, Claudia
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/108962
Resumo: We present the first detection of the near-infrared CN absorption band in the nuclear spectra of active galactic nuclei (AGNs). This feature is a recent star formation tracer, being particularly strong in carbon stars. The equivalent width of the CN line correlates with that of the CO at 2.3 μm as expected in stellar populations (SPs) with ages between ∼0.2 and ∼2 Gyr. The presence of the 1.1 μm CN band in the spectra of the sources is taken as unambiguous evidence of the presence of young/intermediate SPs close to the central source of the AGNs. Near-infrared bands can be powerful age indicators for star formation connected to AGNs, the understanding of which is crucial in the context of galaxy formation and AGN feedback.
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spelling Riffel, Rogemar AndréPastoriza, Miriani GriseldaRodriguez-Ardila, AlbertoMaraston, Claudia2015-01-15T02:15:05Z20070004-637Xhttp://hdl.handle.net/10183/108962000595774We present the first detection of the near-infrared CN absorption band in the nuclear spectra of active galactic nuclei (AGNs). This feature is a recent star formation tracer, being particularly strong in carbon stars. The equivalent width of the CN line correlates with that of the CO at 2.3 μm as expected in stellar populations (SPs) with ages between ∼0.2 and ∼2 Gyr. The presence of the 1.1 μm CN band in the spectra of the sources is taken as unambiguous evidence of the presence of young/intermediate SPs close to the central source of the AGNs. Near-infrared bands can be powerful age indicators for star formation connected to AGNs, the understanding of which is crucial in the context of galaxy formation and AGN feedback.application/pdfengThe Astrophysical journal. Chicago. Vol. 659, no. 2 pt. 2 (Apr. 2007), p. L103-L106Formacao de estrelasNucleo galaticoGaláxias ativasEspectros astronômicosCompostos de carbonoGalaxies: activeGalaxies: nucleiGalaxies: stellar contentThe first detection of near-infrared CN bands in active galactic nuclei : signature of star formationEstrangeiroinfo: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:UFRGSORIGINAL000595774.pdf000595774.pdfTexto completo (inglês)application/pdf117299http://www.lume.ufrgs.br/bitstream/10183/108962/1/000595774.pdff53bad9182f28901b3ac6459ec5272e6MD51TEXT000595774.pdf.txt000595774.pdf.txtExtracted Texttext/plain20254http://www.lume.ufrgs.br/bitstream/10183/108962/2/000595774.pdf.txt51c6defdc9421de1c6e3032c1d78db34MD52THUMBNAIL000595774.pdf.jpg000595774.pdf.jpgGenerated Thumbnailimage/jpeg2043http://www.lume.ufrgs.br/bitstream/10183/108962/3/000595774.pdf.jpgf856a7e4ae8a879e5c712e7324076437MD5310183/1089622024-09-04 06:26:56.551878oai:www.lume.ufrgs.br:10183/108962Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-09-04T09:26:56Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv The first detection of near-infrared CN bands in active galactic nuclei : signature of star formation
title The first detection of near-infrared CN bands in active galactic nuclei : signature of star formation
spellingShingle The first detection of near-infrared CN bands in active galactic nuclei : signature of star formation
Riffel, Rogemar André
Formacao de estrelas
Nucleo galatico
Galáxias ativas
Espectros astronômicos
Compostos de carbono
Galaxies: active
Galaxies: nuclei
Galaxies: stellar content
title_short The first detection of near-infrared CN bands in active galactic nuclei : signature of star formation
title_full The first detection of near-infrared CN bands in active galactic nuclei : signature of star formation
title_fullStr The first detection of near-infrared CN bands in active galactic nuclei : signature of star formation
title_full_unstemmed The first detection of near-infrared CN bands in active galactic nuclei : signature of star formation
title_sort The first detection of near-infrared CN bands in active galactic nuclei : signature of star formation
author Riffel, Rogemar André
author_facet Riffel, Rogemar André
Pastoriza, Miriani Griselda
Rodriguez-Ardila, Alberto
Maraston, Claudia
author_role author
author2 Pastoriza, Miriani Griselda
Rodriguez-Ardila, Alberto
Maraston, Claudia
author2_role author
author
author
dc.contributor.author.fl_str_mv Riffel, Rogemar André
Pastoriza, Miriani Griselda
Rodriguez-Ardila, Alberto
Maraston, Claudia
dc.subject.por.fl_str_mv Formacao de estrelas
Nucleo galatico
Galáxias ativas
Espectros astronômicos
Compostos de carbono
topic Formacao de estrelas
Nucleo galatico
Galáxias ativas
Espectros astronômicos
Compostos de carbono
Galaxies: active
Galaxies: nuclei
Galaxies: stellar content
dc.subject.eng.fl_str_mv Galaxies: active
Galaxies: nuclei
Galaxies: stellar content
description We present the first detection of the near-infrared CN absorption band in the nuclear spectra of active galactic nuclei (AGNs). This feature is a recent star formation tracer, being particularly strong in carbon stars. The equivalent width of the CN line correlates with that of the CO at 2.3 μm as expected in stellar populations (SPs) with ages between ∼0.2 and ∼2 Gyr. The presence of the 1.1 μm CN band in the spectra of the sources is taken as unambiguous evidence of the presence of young/intermediate SPs close to the central source of the AGNs. Near-infrared bands can be powerful age indicators for star formation connected to AGNs, the understanding of which is crucial in the context of galaxy formation and AGN feedback.
publishDate 2007
dc.date.issued.fl_str_mv 2007
dc.date.accessioned.fl_str_mv 2015-01-15T02:15:05Z
dc.type.driver.fl_str_mv Estrangeiro
info:eu-repo/semantics/article
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format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/108962
dc.identifier.issn.pt_BR.fl_str_mv 0004-637X
dc.identifier.nrb.pt_BR.fl_str_mv 000595774
identifier_str_mv 0004-637X
000595774
url http://hdl.handle.net/10183/108962
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv The Astrophysical journal. Chicago. Vol. 659, no. 2 pt. 2 (Apr. 2007), p. L103-L106
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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collection Repositório Institucional da UFRGS
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