Excitation and temperature of extended gas in active galaxies. I Observations

Detalhes bibliográficos
Autor(a) principal: Storchi-Bergmann, Thaisa
Data de Publicação: 1996
Outros Autores: Wilson, Andrew S., Binette, Luc, Mulchaey, John Scott
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/98390
Resumo: We have obtained long-slit spectroscopy of five active galaxies showing extended high excitation emission lines reaching distances of several kiloparsecs from the nuclei. Measurement of the fluxes of weak lines, such as [OIII]λ4363 and HeIIλ4686, requires careful subtraction of the contribution of the stellar population, and the procedure for this subtraction is discussed in detail. For each galaxy, we present emission-line ratios for the nucleus and the extended gas at the most distant locations for which the fluxes of the weaker high excitation lines can be measured with an uncertainty ≤30%. In a companion paper (Paper II), these line ratios are used in a reevaluation of photoionization models of extended gas in active galaxies.
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spelling Storchi-Bergmann, ThaisaWilson, Andrew S.Binette, LucMulchaey, John Scott2014-07-23T02:04:39Z19960004-6361http://hdl.handle.net/10183/98390000148831We have obtained long-slit spectroscopy of five active galaxies showing extended high excitation emission lines reaching distances of several kiloparsecs from the nuclei. Measurement of the fluxes of weak lines, such as [OIII]λ4363 and HeIIλ4686, requires careful subtraction of the contribution of the stellar population, and the procedure for this subtraction is discussed in detail. For each galaxy, we present emission-line ratios for the nucleus and the extended gas at the most distant locations for which the fluxes of the weaker high excitation lines can be measured with an uncertainty ≤30%. In a companion paper (Paper II), these line ratios are used in a reevaluation of photoionization models of extended gas in active galaxies.application/pdfengAstronomy and Astrophysics. Berlin. Vol. 312, no. 2 (Aug. 1996), p. 357-364Astrofisica extragalaticaGalaxias seyfertFotoionizacaoNucleo galaticoGaláxiasTemperaturaPopulacoes estelaresGalaxies: activeGalaxies: ISMGalaxies: nucleiGalaxies: SeyfertExcitation and temperature of extended gas in active galaxies. I ObservationsEstrangeiroinfo: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:UFRGSORIGINAL000148831.pdf000148831.pdfTexto completo (inglês)application/pdf985762http://www.lume.ufrgs.br/bitstream/10183/98390/1/000148831.pdf927ddfeaaf7574844b4b69521342f64dMD51TEXT000148831.pdf.txt000148831.pdf.txtExtracted Texttext/plain33062http://www.lume.ufrgs.br/bitstream/10183/98390/2/000148831.pdf.txt7fff04ccf3922028f624c836372284b8MD52THUMBNAIL000148831.pdf.jpg000148831.pdf.jpgGenerated Thumbnailimage/jpeg2214http://www.lume.ufrgs.br/bitstream/10183/98390/3/000148831.pdf.jpgd5a46883acbc2c25e5fbf7ffcb9e3aebMD5310183/983902018-10-17 09:01:01.786oai:www.lume.ufrgs.br:10183/98390Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-17T12:01:01Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Excitation and temperature of extended gas in active galaxies. I Observations
title Excitation and temperature of extended gas in active galaxies. I Observations
spellingShingle Excitation and temperature of extended gas in active galaxies. I Observations
Storchi-Bergmann, Thaisa
Astrofisica extragalatica
Galaxias seyfert
Fotoionizacao
Nucleo galatico
Galáxias
Temperatura
Populacoes estelares
Galaxies: active
Galaxies: ISM
Galaxies: nuclei
Galaxies: Seyfert
title_short Excitation and temperature of extended gas in active galaxies. I Observations
title_full Excitation and temperature of extended gas in active galaxies. I Observations
title_fullStr Excitation and temperature of extended gas in active galaxies. I Observations
title_full_unstemmed Excitation and temperature of extended gas in active galaxies. I Observations
title_sort Excitation and temperature of extended gas in active galaxies. I Observations
author Storchi-Bergmann, Thaisa
author_facet Storchi-Bergmann, Thaisa
Wilson, Andrew S.
Binette, Luc
Mulchaey, John Scott
author_role author
author2 Wilson, Andrew S.
Binette, Luc
Mulchaey, John Scott
author2_role author
author
author
dc.contributor.author.fl_str_mv Storchi-Bergmann, Thaisa
Wilson, Andrew S.
Binette, Luc
Mulchaey, John Scott
dc.subject.por.fl_str_mv Astrofisica extragalatica
Galaxias seyfert
Fotoionizacao
Nucleo galatico
Galáxias
Temperatura
Populacoes estelares
topic Astrofisica extragalatica
Galaxias seyfert
Fotoionizacao
Nucleo galatico
Galáxias
Temperatura
Populacoes estelares
Galaxies: active
Galaxies: ISM
Galaxies: nuclei
Galaxies: Seyfert
dc.subject.eng.fl_str_mv Galaxies: active
Galaxies: ISM
Galaxies: nuclei
Galaxies: Seyfert
description We have obtained long-slit spectroscopy of five active galaxies showing extended high excitation emission lines reaching distances of several kiloparsecs from the nuclei. Measurement of the fluxes of weak lines, such as [OIII]λ4363 and HeIIλ4686, requires careful subtraction of the contribution of the stellar population, and the procedure for this subtraction is discussed in detail. For each galaxy, we present emission-line ratios for the nucleus and the extended gas at the most distant locations for which the fluxes of the weaker high excitation lines can be measured with an uncertainty ≤30%. In a companion paper (Paper II), these line ratios are used in a reevaluation of photoionization models of extended gas in active galaxies.
publishDate 1996
dc.date.issued.fl_str_mv 1996
dc.date.accessioned.fl_str_mv 2014-07-23T02:04:39Z
dc.type.driver.fl_str_mv Estrangeiro
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/98390
dc.identifier.issn.pt_BR.fl_str_mv 0004-6361
dc.identifier.nrb.pt_BR.fl_str_mv 000148831
identifier_str_mv 0004-6361
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url http://hdl.handle.net/10183/98390
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv Astronomy and Astrophysics. Berlin. Vol. 312, no. 2 (Aug. 1996), p. 357-364
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eu_rights_str_mv openAccess
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