LLAMA : normal star formation efficiencies of molecular gas in the centres of luminous Seyfert galaxies
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/178119 |
Resumo: | Using new Atacama Pathfinder Experiment and James Clerk Maxwell Telescope spectroscopy of the CO 2→1 line, we undertake a controlled study of cold molecular gas in moderately luminous (Lbol = 1043–44.5 erg s−1) active galactic nuclei (AGN) and inactive galaxies from the Luminous Local AGN with Matched Analogs (LLAMA) survey.We use spatially resolved infrared photometry of the LLAMA galaxies from 2MASS, the Wide-field Infrared Survey Explorer the Infrared Astronomical Satellite and the Herschel Space Observatory (Herschel), corrected for nuclear emission using multicomponent spectral energy distribution fits, to examine the dust-reprocessed star formation rates, molecular gas fractions and star formation efficiencies (SFEs) over their central 1–3 kpc. We find that the gas fractions and central SFEs of both active and inactive galaxies are similar when controlling for host stellar mass and morphology (Hubble type). The equivalent central molecular gas depletion times are consistent with the discs of normal spiral galaxies in the local Universe. Despite energetic arguments that the AGN in LLAMA should be capable of disrupting the observable cold molecular gas in their central environments, our results indicate that nuclear radiation only couples weakly with this phase. We find a mild preference for obscured AGN to contain higher amounts of central molecular gas, which suggests connection between AGN obscuration and the gaseous environment of the nucleus. Systems with depressed SFEs are not found among the LLAMA AGN. We speculate that the processes that sustain the collapse of molecular gas into dense pre-stellar cores may also be a prerequisite for the inflow of material on to AGN accretion discs. |
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Rosario, DavidRiffel, RogérioMüller, Allan SchnorrStorchi-Bergmann, ThaisaVeilleux, Sylvain2018-05-11T02:33:13Z20180035-8711http://hdl.handle.net/10183/178119001062407Using new Atacama Pathfinder Experiment and James Clerk Maxwell Telescope spectroscopy of the CO 2→1 line, we undertake a controlled study of cold molecular gas in moderately luminous (Lbol = 1043–44.5 erg s−1) active galactic nuclei (AGN) and inactive galaxies from the Luminous Local AGN with Matched Analogs (LLAMA) survey.We use spatially resolved infrared photometry of the LLAMA galaxies from 2MASS, the Wide-field Infrared Survey Explorer the Infrared Astronomical Satellite and the Herschel Space Observatory (Herschel), corrected for nuclear emission using multicomponent spectral energy distribution fits, to examine the dust-reprocessed star formation rates, molecular gas fractions and star formation efficiencies (SFEs) over their central 1–3 kpc. We find that the gas fractions and central SFEs of both active and inactive galaxies are similar when controlling for host stellar mass and morphology (Hubble type). The equivalent central molecular gas depletion times are consistent with the discs of normal spiral galaxies in the local Universe. Despite energetic arguments that the AGN in LLAMA should be capable of disrupting the observable cold molecular gas in their central environments, our results indicate that nuclear radiation only couples weakly with this phase. We find a mild preference for obscured AGN to contain higher amounts of central molecular gas, which suggests connection between AGN obscuration and the gaseous environment of the nucleus. Systems with depressed SFEs are not found among the LLAMA AGN. We speculate that the processes that sustain the collapse of molecular gas into dense pre-stellar cores may also be a prerequisite for the inflow of material on to AGN accretion discs.application/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 473, no. 4 (Feb. 2018), p. 5658-5679Galaxias seyfertFormacao de estrelasGaláxias ativasNucleo galaticoFotometria astronômicaMethods: statisticalISM: moleculesGalaxies: ISMGalaxies: star formationGalaxies: SeyfertInfrared: galaxiesLLAMA : normal star formation efficiencies of molecular gas in the centres of luminous Seyfert galaxiesEstrangeiroinfo: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:UFRGSORIGINAL001062407.pdf001062407.pdfTexto completo (inglês)application/pdf3851413http://www.lume.ufrgs.br/bitstream/10183/178119/1/001062407.pdfe7b162bd201e3076d9b63b94fe89fe34MD51TEXT001062407.pdf.txt001062407.pdf.txtExtracted Texttext/plain117330http://www.lume.ufrgs.br/bitstream/10183/178119/2/001062407.pdf.txtb9eb0b6db7d703a0dbbcb1b67fc44b14MD5210183/1781192023-07-20 03:35:14.139437oai:www.lume.ufrgs.br:10183/178119Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-20T06:35:14Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
LLAMA : normal star formation efficiencies of molecular gas in the centres of luminous Seyfert galaxies |
title |
LLAMA : normal star formation efficiencies of molecular gas in the centres of luminous Seyfert galaxies |
spellingShingle |
LLAMA : normal star formation efficiencies of molecular gas in the centres of luminous Seyfert galaxies Rosario, David Galaxias seyfert Formacao de estrelas Galáxias ativas Nucleo galatico Fotometria astronômica Methods: statistical ISM: molecules Galaxies: ISM Galaxies: star formation Galaxies: Seyfert Infrared: galaxies |
title_short |
LLAMA : normal star formation efficiencies of molecular gas in the centres of luminous Seyfert galaxies |
title_full |
LLAMA : normal star formation efficiencies of molecular gas in the centres of luminous Seyfert galaxies |
title_fullStr |
LLAMA : normal star formation efficiencies of molecular gas in the centres of luminous Seyfert galaxies |
title_full_unstemmed |
LLAMA : normal star formation efficiencies of molecular gas in the centres of luminous Seyfert galaxies |
title_sort |
LLAMA : normal star formation efficiencies of molecular gas in the centres of luminous Seyfert galaxies |
author |
Rosario, David |
author_facet |
Rosario, David Riffel, Rogério Müller, Allan Schnorr Storchi-Bergmann, Thaisa Veilleux, Sylvain |
author_role |
author |
author2 |
Riffel, Rogério Müller, Allan Schnorr Storchi-Bergmann, Thaisa Veilleux, Sylvain |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Rosario, David Riffel, Rogério Müller, Allan Schnorr Storchi-Bergmann, Thaisa Veilleux, Sylvain |
dc.subject.por.fl_str_mv |
Galaxias seyfert Formacao de estrelas Galáxias ativas Nucleo galatico Fotometria astronômica |
topic |
Galaxias seyfert Formacao de estrelas Galáxias ativas Nucleo galatico Fotometria astronômica Methods: statistical ISM: molecules Galaxies: ISM Galaxies: star formation Galaxies: Seyfert Infrared: galaxies |
dc.subject.eng.fl_str_mv |
Methods: statistical ISM: molecules Galaxies: ISM Galaxies: star formation Galaxies: Seyfert Infrared: galaxies |
description |
Using new Atacama Pathfinder Experiment and James Clerk Maxwell Telescope spectroscopy of the CO 2→1 line, we undertake a controlled study of cold molecular gas in moderately luminous (Lbol = 1043–44.5 erg s−1) active galactic nuclei (AGN) and inactive galaxies from the Luminous Local AGN with Matched Analogs (LLAMA) survey.We use spatially resolved infrared photometry of the LLAMA galaxies from 2MASS, the Wide-field Infrared Survey Explorer the Infrared Astronomical Satellite and the Herschel Space Observatory (Herschel), corrected for nuclear emission using multicomponent spectral energy distribution fits, to examine the dust-reprocessed star formation rates, molecular gas fractions and star formation efficiencies (SFEs) over their central 1–3 kpc. We find that the gas fractions and central SFEs of both active and inactive galaxies are similar when controlling for host stellar mass and morphology (Hubble type). The equivalent central molecular gas depletion times are consistent with the discs of normal spiral galaxies in the local Universe. Despite energetic arguments that the AGN in LLAMA should be capable of disrupting the observable cold molecular gas in their central environments, our results indicate that nuclear radiation only couples weakly with this phase. We find a mild preference for obscured AGN to contain higher amounts of central molecular gas, which suggests connection between AGN obscuration and the gaseous environment of the nucleus. Systems with depressed SFEs are not found among the LLAMA AGN. We speculate that the processes that sustain the collapse of molecular gas into dense pre-stellar cores may also be a prerequisite for the inflow of material on to AGN accretion discs. |
publishDate |
2018 |
dc.date.accessioned.fl_str_mv |
2018-05-11T02:33:13Z |
dc.date.issued.fl_str_mv |
2018 |
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 |
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publishedVersion |
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http://hdl.handle.net/10183/178119 |
dc.identifier.issn.pt_BR.fl_str_mv |
0035-8711 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001062407 |
identifier_str_mv |
0035-8711 001062407 |
url |
http://hdl.handle.net/10183/178119 |
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. 473, no. 4 (Feb. 2018), p. 5658-5679 |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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