Radiatively inefficient accretion flow in the nucleus of NGC 1097

We present a model for the accretion flow around the supermassive black hole in the LINER nucleus of NGC 1097 that fits the optical to X-ray spectral energy distribution (SED). The X-ray segment of the SED is based on observations with the Chandra X-Ray Observatory, which are reported here for the f...

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Autores: Nemmen, Rodrigo S., Storchi-Bergmann, Thaisa, Yuan, Feng, Eracleous, Michael, Terashima, Yuichi, Wilson, Andrew S.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2006
País:Brasil
Recursos:Universidade Federal do Rio Grande do Sul (UFRGS)
Repositorio:Repositório Institucional da UFRGS
Idioma:inglés
OAI Identifier:oai:www.lume.ufrgs.br:10183/108918
Acesso em linha:http://hdl.handle.net/10183/108918
Access Level:acceso abierto
Palavra-chave:Buracos negros
Nucleo galatico
Galáxias ativas
Acreção
Espectros astronômicos
Accretion, accretion disks
Black hole physics
Galaxies: active
Galaxies: individual (NGC 1097)
Galaxies: nuclei
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spelling 2015-01-14T02:15:58Z20060004-637Xhttp://hdl.handle.net/10183/108918000558714We present a model for the accretion flow around the supermassive black hole in the LINER nucleus of NGC 1097 that fits the optical to X-ray spectral energy distribution (SED). The X-ray segment of the SED is based on observations with the Chandra X-Ray Observatory, which are reported here for the first time. The inner part of the flow is modeled as a radiatively inefficient accretion flow (RIAF), and the outer part as a standard thin disk. The value of the transition radius (rtr ≈ 225RS, where RS = 2GM/c²) between the RIAF and the outer thin disk was obtained from our previous fitting of the double-peaked Balmer emission line profile, which originates in the thin disk. The black hole mass was inferred from measurements of the stellar velocity dispersion in the host galaxy. When these parameters are used in the accretion flow model, the SED can be successfully reproduced, which shows that the line profile model and the accretion flow model are consistent with each other. A small remaining excess in the near-UV is accounted for by the contribution of an obscured starburst located within 9 pc from the nucleus, as we reported in an earlier paper. The radio flux is consistent with synchrotron emission of a relativistic jet modeled by means of the internal shock scenario. In an appendixwe also analyze the Chandra X-ray observations of the ~1 kpc circumnuclear star-forming ring and of an ultraluminous compact X-ray source located outside the ring.application/pdfengThe astrophysical journal. Chicago. Vol. 643, no. 2, (June 2006), p. 652-659Buracos negrosNucleo galaticoGaláxias ativasAcreçãoEspectros astronômicosAccretion, accretion disksBlack hole physicsGalaxies: activeGalaxies: individual (NGC 1097)Galaxies: nucleiRadiatively inefficient accretion flow in the nucleus of NGC 1097Estrangeiroinfo: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:UFRGSNemmen, Rodrigo S.Storchi-Bergmann, ThaisaYuan, FengEracleous, MichaelTerashima, YuichiWilson, Andrew S.ORIGINAL000558714.pdf000558714.pdfTexto completo (inglês)application/pdf262305http://www.lume.ufrgs.br/bitstream/10183/108918/1/000558714.pdfd486ee781b838db91e1228fb48a0c195MD51TEXT000558714.pdf.txt000558714.pdf.txtExtracted Texttext/plain45670http://www.lume.ufrgs.br/bitstream/10183/108918/2/000558714.pdf.txtf9000d90338d8f5b44770123e50b3bbdMD52THUMBNAIL000558714.pdf.jpg000558714.pdf.jpgGenerated Thumbnailimage/jpeg1826http://www.lume.ufrgs.br/bitstream/10183/108918/3/000558714.pdf.jpgf3d38797cef9f32538822e011f2ae1d4MD5310183/1089182018-10-23 08:39:41.913oai:www.lume.ufrgs.br:10183/108918Repositório InstitucionalPUBhttps://lume.ufrgs.br/oai/requestlume@ufrgs.bropendoar:2018-10-23T11:39:41Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Radiatively inefficient accretion flow in the nucleus of NGC 1097
title Radiatively inefficient accretion flow in the nucleus of NGC 1097
spellingShingle Radiatively inefficient accretion flow in the nucleus of NGC 1097
Nemmen, Rodrigo S.
Buracos negros
Nucleo galatico
Galáxias ativas
Acreção
Espectros astronômicos
Accretion, accretion disks
Black hole physics
Galaxies: active
Galaxies: individual (NGC 1097)
Galaxies: nuclei
title_short Radiatively inefficient accretion flow in the nucleus of NGC 1097
title_full Radiatively inefficient accretion flow in the nucleus of NGC 1097
title_fullStr Radiatively inefficient accretion flow in the nucleus of NGC 1097
title_full_unstemmed Radiatively inefficient accretion flow in the nucleus of NGC 1097
title_sort Radiatively inefficient accretion flow in the nucleus of NGC 1097
dc.creator.none.fl_str_mv Nemmen, Rodrigo S.
Storchi-Bergmann, Thaisa
Yuan, Feng
Eracleous, Michael
Terashima, Yuichi
Wilson, Andrew S.
author Nemmen, Rodrigo S.
author_facet Nemmen, Rodrigo S.
Storchi-Bergmann, Thaisa
Yuan, Feng
Eracleous, Michael
Terashima, Yuichi
Wilson, Andrew S.
author_role author
author2 Storchi-Bergmann, Thaisa
Yuan, Feng
Eracleous, Michael
Terashima, Yuichi
Wilson, Andrew S.
author2_role author
author
author
author
author
dc.subject.por.fl_str_mv Buracos negros
Nucleo galatico
Galáxias ativas
Acreção
Espectros astronômicos
topic Buracos negros
Nucleo galatico
Galáxias ativas
Acreção
Espectros astronômicos
Accretion, accretion disks
Black hole physics
Galaxies: active
Galaxies: individual (NGC 1097)
Galaxies: nuclei
dc.subject.eng.fl_str_mv Accretion, accretion disks
Black hole physics
Galaxies: active
Galaxies: individual (NGC 1097)
Galaxies: nuclei
description We present a model for the accretion flow around the supermassive black hole in the LINER nucleus of NGC 1097 that fits the optical to X-ray spectral energy distribution (SED). The X-ray segment of the SED is based on observations with the Chandra X-Ray Observatory, which are reported here for the first time. The inner part of the flow is modeled as a radiatively inefficient accretion flow (RIAF), and the outer part as a standard thin disk. The value of the transition radius (rtr ≈ 225RS, where RS = 2GM/c²) between the RIAF and the outer thin disk was obtained from our previous fitting of the double-peaked Balmer emission line profile, which originates in the thin disk. The black hole mass was inferred from measurements of the stellar velocity dispersion in the host galaxy. When these parameters are used in the accretion flow model, the SED can be successfully reproduced, which shows that the line profile model and the accretion flow model are consistent with each other. A small remaining excess in the near-UV is accounted for by the contribution of an obscured starburst located within 9 pc from the nucleus, as we reported in an earlier paper. The radio flux is consistent with synchrotron emission of a relativistic jet modeled by means of the internal shock scenario. In an appendixwe also analyze the Chandra X-ray observations of the ~1 kpc circumnuclear star-forming ring and of an ultraluminous compact X-ray source located outside the ring.
publishDate 2006
dc.date.issued.fl_str_mv 2006
dc.date.accessioned.fl_str_mv 2015-01-14T02:15:58Z
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/10183/108918
dc.identifier.issn.pt_BR.fl_str_mv 0004-637X
dc.identifier.nrb.pt_BR.fl_str_mv 000558714
identifier_str_mv 0004-637X
000558714
url http://hdl.handle.net/10183/108918
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv The astrophysical journal. Chicago. Vol. 643, no. 2, (June 2006), p. 652-659
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRGS
instname:Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
instname_str Universidade Federal do Rio Grande do Sul (UFRGS)
instacron_str UFRGS
institution UFRGS
reponame_str Repositório Institucional da UFRGS
collection Repositório Institucional da UFRGS
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