The OH Megamaser galaxy IRAS11506−3851 : an AGN and star formation revealed by multiwavelength observations
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/10183/217838 |
Resumo: | We present Gemini Multi-Object Spectrograph (GMOS) Integral Field Unit (IFU), Hubble Space Telescope (HST), and Very Large Array (VLA) observations of the OH Megamaser (OHM) galaxy IRAS 11506−3851. The HST images reveal an isolated spiral galaxy and the combination with the GMOS-IFU flux distributions and VLA data allow us to identify a partial ring of star-forming regions surrounding the nucleus with a radius of ≈ 500 pc. While this ring shows starburst excitation and low velocity dispersion, the region internal to the ring shows higher excitation and velocity dispersion values, with values increasing towards its borders at ≈ 240 pc from the nucleus, resembling a projected bubble. The enhanced excitation and velocity dispersion of this bubble surrounds a 8.5-GHz radio emission structure, supporting its origin in a faint active galactic nucleus (AGN) that is mostly shocking the surrounding gas via a plasma ejection seen in radio at the present stage. This is the fourth of the 5 OHM galaxies we have studied so far (from our sample of 15 OHM) for which GMOS-IFU data indicate the presence of a previously unknown faint AGN at the nucleus, consistent with the hypothesis that OHM galaxies harbour recently triggered AGN. |
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Carpes, Hekatelyne PrestesRiffel, Rogemar AndréStorchi-Bergmann, ThaisaKharb, PreetiRobinson, AndrewSales, Dinalva Aires deCassanta, Claudia Marzari2021-02-09T04:08:02Z20200035-8711http://hdl.handle.net/10183/217838001120551We present Gemini Multi-Object Spectrograph (GMOS) Integral Field Unit (IFU), Hubble Space Telescope (HST), and Very Large Array (VLA) observations of the OH Megamaser (OHM) galaxy IRAS 11506−3851. The HST images reveal an isolated spiral galaxy and the combination with the GMOS-IFU flux distributions and VLA data allow us to identify a partial ring of star-forming regions surrounding the nucleus with a radius of ≈ 500 pc. While this ring shows starburst excitation and low velocity dispersion, the region internal to the ring shows higher excitation and velocity dispersion values, with values increasing towards its borders at ≈ 240 pc from the nucleus, resembling a projected bubble. The enhanced excitation and velocity dispersion of this bubble surrounds a 8.5-GHz radio emission structure, supporting its origin in a faint active galactic nucleus (AGN) that is mostly shocking the surrounding gas via a plasma ejection seen in radio at the present stage. This is the fourth of the 5 OHM galaxies we have studied so far (from our sample of 15 OHM) for which GMOS-IFU data indicate the presence of a previously unknown faint AGN at the nucleus, consistent with the hypothesis that OHM galaxies harbour recently triggered AGN.application/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 498, no. 2 (Oct. 2020), p. 2632–2644Galáxias ativasMeio interestelarCinemática estelarGalaxies: activeGalaxies: ISMGalaxies: kinematics and dynamicsThe OH Megamaser galaxy IRAS11506−3851 : an AGN and star formation revealed by multiwavelength 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:UFRGSTEXT001120551.pdf.txt001120551.pdf.txtExtracted Texttext/plain57759http://www.lume.ufrgs.br/bitstream/10183/217838/2/001120551.pdf.txte83263f001698a93ea4e7b31ab69a22fMD52ORIGINAL001120551.pdfTexto completo (inglês)application/pdf3400251http://www.lume.ufrgs.br/bitstream/10183/217838/1/001120551.pdffaeca7c6e1d910b2b09c23cf9a062743MD5110183/2178382021-03-09 04:47:29.896523oai:www.lume.ufrgs.br:10183/217838Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-03-09T07:47:29Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
The OH Megamaser galaxy IRAS11506−3851 : an AGN and star formation revealed by multiwavelength observations |
title |
The OH Megamaser galaxy IRAS11506−3851 : an AGN and star formation revealed by multiwavelength observations |
spellingShingle |
The OH Megamaser galaxy IRAS11506−3851 : an AGN and star formation revealed by multiwavelength observations Carpes, Hekatelyne Prestes Galáxias ativas Meio interestelar Cinemática estelar Galaxies: active Galaxies: ISM Galaxies: kinematics and dynamics |
title_short |
The OH Megamaser galaxy IRAS11506−3851 : an AGN and star formation revealed by multiwavelength observations |
title_full |
The OH Megamaser galaxy IRAS11506−3851 : an AGN and star formation revealed by multiwavelength observations |
title_fullStr |
The OH Megamaser galaxy IRAS11506−3851 : an AGN and star formation revealed by multiwavelength observations |
title_full_unstemmed |
The OH Megamaser galaxy IRAS11506−3851 : an AGN and star formation revealed by multiwavelength observations |
title_sort |
The OH Megamaser galaxy IRAS11506−3851 : an AGN and star formation revealed by multiwavelength observations |
author |
Carpes, Hekatelyne Prestes |
author_facet |
Carpes, Hekatelyne Prestes Riffel, Rogemar André Storchi-Bergmann, Thaisa Kharb, Preeti Robinson, Andrew Sales, Dinalva Aires de Cassanta, Claudia Marzari |
author_role |
author |
author2 |
Riffel, Rogemar André Storchi-Bergmann, Thaisa Kharb, Preeti Robinson, Andrew Sales, Dinalva Aires de Cassanta, Claudia Marzari |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Carpes, Hekatelyne Prestes Riffel, Rogemar André Storchi-Bergmann, Thaisa Kharb, Preeti Robinson, Andrew Sales, Dinalva Aires de Cassanta, Claudia Marzari |
dc.subject.por.fl_str_mv |
Galáxias ativas Meio interestelar Cinemática estelar |
topic |
Galáxias ativas Meio interestelar Cinemática estelar Galaxies: active Galaxies: ISM Galaxies: kinematics and dynamics |
dc.subject.eng.fl_str_mv |
Galaxies: active Galaxies: ISM Galaxies: kinematics and dynamics |
description |
We present Gemini Multi-Object Spectrograph (GMOS) Integral Field Unit (IFU), Hubble Space Telescope (HST), and Very Large Array (VLA) observations of the OH Megamaser (OHM) galaxy IRAS 11506−3851. The HST images reveal an isolated spiral galaxy and the combination with the GMOS-IFU flux distributions and VLA data allow us to identify a partial ring of star-forming regions surrounding the nucleus with a radius of ≈ 500 pc. While this ring shows starburst excitation and low velocity dispersion, the region internal to the ring shows higher excitation and velocity dispersion values, with values increasing towards its borders at ≈ 240 pc from the nucleus, resembling a projected bubble. The enhanced excitation and velocity dispersion of this bubble surrounds a 8.5-GHz radio emission structure, supporting its origin in a faint active galactic nucleus (AGN) that is mostly shocking the surrounding gas via a plasma ejection seen in radio at the present stage. This is the fourth of the 5 OHM galaxies we have studied so far (from our sample of 15 OHM) for which GMOS-IFU data indicate the presence of a previously unknown faint AGN at the nucleus, consistent with the hypothesis that OHM galaxies harbour recently triggered AGN. |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020 |
dc.date.accessioned.fl_str_mv |
2021-02-09T04:08:02Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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info:eu-repo/semantics/publishedVersion |
format |
article |
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publishedVersion |
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http://hdl.handle.net/10183/217838 |
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0035-8711 |
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001120551 |
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0035-8711 001120551 |
url |
http://hdl.handle.net/10183/217838 |
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. 2 (Oct. 2020), p. 2632–2644 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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