Ionized outflows in local luminous AGN : what are the real densities and outflow rates?
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , , , , , , , , , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/217827 |
Resumo: | We report on the determination of electron densities, and their impact on the outflow masses and rates, measured in the central few hundred parsecs of 11 local luminous active galaxies. We show that the peak of the integrated line emission in the active galactic nuclei (AGN) is significantly offset from the systemic velocity as traced by the stellar absorption features, indicating that the profiles are dominated by outflow. In contrast, matched inactive galaxies are characterized by a systemic peak and weaker outflow wing. We present three independent estimates of the electron density in these AGN, discussing the merits of the different methods. The electron density derived from the [S II] doublet is significantly lower than that found with a method developed in the last decade using auroral and transauroral lines, as well as a recently introduced method based on the ionization parameter. The reason is that, for gas photoionized by an AGN, much of the [S II] emission arises in an extended partially ionized zone where the implicit assumption that the electron density traces the hydrogen density is invalid. We propose ways to deal with this situation and we derive the associated outflow rates for ionized gas, which are in the range 0.001–0.5 M yr−1 for our AGN sample. We compare these outflow rates to the relation between M˙ out and LAGN in the literature, and argue that it may need to be modified and rescaled towards lower mass outflow rates. |
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Davies, Richard I.Baron, DalyaShimizu, TaroNetzer, HagaiBurtscher, LeonardDe Zeeuw, P. TimGenzel, ReinhardHicks, Erin K. S.Koss, MichaelLin, Ming-YiLutz, DieterMaciejewski, Witold B.Muller-Sanchez, FranciscoOrban de Xivry, GillesRicci, ClaudioRiffel, RogérioRiffel, Rogemar AndréRosario, DavidSchartmann, MarcMüller, Allan SchnorrShangguan, J.Sternberg, AmielSturm, EckhardStorchi-Bergmann, ThaisaTacconi, Linda J.Veilleux, Sylvain2021-02-09T04:07:46Z20200035-8711http://hdl.handle.net/10183/217827001120561We report on the determination of electron densities, and their impact on the outflow masses and rates, measured in the central few hundred parsecs of 11 local luminous active galaxies. We show that the peak of the integrated line emission in the active galactic nuclei (AGN) is significantly offset from the systemic velocity as traced by the stellar absorption features, indicating that the profiles are dominated by outflow. In contrast, matched inactive galaxies are characterized by a systemic peak and weaker outflow wing. We present three independent estimates of the electron density in these AGN, discussing the merits of the different methods. The electron density derived from the [S II] doublet is significantly lower than that found with a method developed in the last decade using auroral and transauroral lines, as well as a recently introduced method based on the ionization parameter. The reason is that, for gas photoionized by an AGN, much of the [S II] emission arises in an extended partially ionized zone where the implicit assumption that the electron density traces the hydrogen density is invalid. We propose ways to deal with this situation and we derive the associated outflow rates for ionized gas, which are in the range 0.001–0.5 M yr−1 for our AGN sample. We compare these outflow rates to the relation between M˙ out and LAGN in the literature, and argue that it may need to be modified and rescaled towards lower mass outflow rates.application/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 498, no. 3 (Nov. 2020), p. 4150–4177Galáxias ativasMeio interestelarNucleo galaticoGalaxias seyfertGalaxies: activeGalaxies: ISMGalaxies: nucleiGalaxies: SeyfertIonized outflows in local luminous AGN : what are the real densities and outflow rates?Estrangeiroinfo: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:UFRGSTEXT001120561.pdf.txt001120561.pdf.txtExtracted Texttext/plain126839http://www.lume.ufrgs.br/bitstream/10183/217827/2/001120561.pdf.txtcfcb93281d63f0ea7ac1e5e45fd5d78aMD52ORIGINAL001120561.pdfTexto completo (inglês)application/pdf3168202http://www.lume.ufrgs.br/bitstream/10183/217827/1/001120561.pdf33e66a63c497f2e2eedd333500d31eefMD5110183/2178272023-07-20 03:35:54.283628oai:www.lume.ufrgs.br:10183/217827Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-20T06:35:54Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Ionized outflows in local luminous AGN : what are the real densities and outflow rates? |
title |
Ionized outflows in local luminous AGN : what are the real densities and outflow rates? |
spellingShingle |
Ionized outflows in local luminous AGN : what are the real densities and outflow rates? Davies, Richard I. Galáxias ativas Meio interestelar Nucleo galatico Galaxias seyfert Galaxies: active Galaxies: ISM Galaxies: nuclei Galaxies: Seyfert |
title_short |
Ionized outflows in local luminous AGN : what are the real densities and outflow rates? |
title_full |
Ionized outflows in local luminous AGN : what are the real densities and outflow rates? |
title_fullStr |
Ionized outflows in local luminous AGN : what are the real densities and outflow rates? |
title_full_unstemmed |
Ionized outflows in local luminous AGN : what are the real densities and outflow rates? |
title_sort |
Ionized outflows in local luminous AGN : what are the real densities and outflow rates? |
author |
Davies, Richard I. |
author_facet |
Davies, Richard I. Baron, Dalya Shimizu, Taro Netzer, Hagai Burtscher, Leonard De Zeeuw, P. Tim Genzel, Reinhard Hicks, Erin K. S. Koss, Michael Lin, Ming-Yi Lutz, Dieter Maciejewski, Witold B. Muller-Sanchez, Francisco Orban de Xivry, Gilles Ricci, Claudio Riffel, Rogério Riffel, Rogemar André Rosario, David Schartmann, Marc Müller, Allan Schnorr Shangguan, J. Sternberg, Amiel Sturm, Eckhard Storchi-Bergmann, Thaisa Tacconi, Linda J. Veilleux, Sylvain |
author_role |
author |
author2 |
Baron, Dalya Shimizu, Taro Netzer, Hagai Burtscher, Leonard De Zeeuw, P. Tim Genzel, Reinhard Hicks, Erin K. S. Koss, Michael Lin, Ming-Yi Lutz, Dieter Maciejewski, Witold B. Muller-Sanchez, Francisco Orban de Xivry, Gilles Ricci, Claudio Riffel, Rogério Riffel, Rogemar André Rosario, David Schartmann, Marc Müller, Allan Schnorr Shangguan, J. Sternberg, Amiel Sturm, Eckhard Storchi-Bergmann, Thaisa Tacconi, Linda J. Veilleux, Sylvain |
author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Davies, Richard I. Baron, Dalya Shimizu, Taro Netzer, Hagai Burtscher, Leonard De Zeeuw, P. Tim Genzel, Reinhard Hicks, Erin K. S. Koss, Michael Lin, Ming-Yi Lutz, Dieter Maciejewski, Witold B. Muller-Sanchez, Francisco Orban de Xivry, Gilles Ricci, Claudio Riffel, Rogério Riffel, Rogemar André Rosario, David Schartmann, Marc Müller, Allan Schnorr Shangguan, J. Sternberg, Amiel Sturm, Eckhard Storchi-Bergmann, Thaisa Tacconi, Linda J. Veilleux, Sylvain |
dc.subject.por.fl_str_mv |
Galáxias ativas Meio interestelar Nucleo galatico Galaxias seyfert |
topic |
Galáxias ativas Meio interestelar Nucleo galatico Galaxias seyfert Galaxies: active Galaxies: ISM Galaxies: nuclei Galaxies: Seyfert |
dc.subject.eng.fl_str_mv |
Galaxies: active Galaxies: ISM Galaxies: nuclei Galaxies: Seyfert |
description |
We report on the determination of electron densities, and their impact on the outflow masses and rates, measured in the central few hundred parsecs of 11 local luminous active galaxies. We show that the peak of the integrated line emission in the active galactic nuclei (AGN) is significantly offset from the systemic velocity as traced by the stellar absorption features, indicating that the profiles are dominated by outflow. In contrast, matched inactive galaxies are characterized by a systemic peak and weaker outflow wing. We present three independent estimates of the electron density in these AGN, discussing the merits of the different methods. The electron density derived from the [S II] doublet is significantly lower than that found with a method developed in the last decade using auroral and transauroral lines, as well as a recently introduced method based on the ionization parameter. The reason is that, for gas photoionized by an AGN, much of the [S II] emission arises in an extended partially ionized zone where the implicit assumption that the electron density traces the hydrogen density is invalid. We propose ways to deal with this situation and we derive the associated outflow rates for ionized gas, which are in the range 0.001–0.5 M yr−1 for our AGN sample. We compare these outflow rates to the relation between M˙ out and LAGN in the literature, and argue that it may need to be modified and rescaled towards lower mass outflow rates. |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020 |
dc.date.accessioned.fl_str_mv |
2021-02-09T04:07:46Z |
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/10183/217827 |
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0035-8711 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001120561 |
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0035-8711 001120561 |
url |
http://hdl.handle.net/10183/217827 |
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. 498, no. 3 (Nov. 2020), p. 4150–4177 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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