Two-dimensional mapping of young stars in the inner 180 pc of NGC 1068 : correlation with molecular gas ring and stellar kinematics
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/109057 |
Resumo: | We report the first two-dimensional mapping of the stellar population and non-stellar continua within the inner 180 pc (radius) of NGC 1068 at a spatial resolution of 8 pc, using integral field spectroscopy in the near-infrared. We have applied the technique of spectral synthesis to data obtained with the instrument NIFS and the adaptive optics module ALTAIR at the Gemini North Telescope. Two episodes of recent star formation are found to dominate the stellar population contribution: the first occurred 300 Myr ago, extending over most of the nuclear region; the second occurred just 30 Myr ago, in a ring-like structure at ≈100 pc from the nucleus, where it is coincident with an expanding ring of H2 emission. Inside the ring, where a decrease in the stellar velocity dispersion is observed, the stellar population is dominated by the 300 Myr age component. In the inner 35 pc, the oldest age component (age ≥ 2 Gyr) dominates the mass, while the flux is dominated by blackbody components with temperatures in the range 700 K ≤ T ≤ 800 K which we attribute to the dusty torus. We also find some contribution from blackbody and power-law components beyond the nucleus which we attribute to dust emission and scattered light. |
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Storchi-Bergmann, ThaisaRiffel, Rogemar AndréRiffel, RogérioDiniz, Marlon RodrigoVale, Tibério BorgesMcGregor, Peter J.2015-01-20T02:15:16Z20120004-637Xhttp://hdl.handle.net/10183/109057000869124We report the first two-dimensional mapping of the stellar population and non-stellar continua within the inner 180 pc (radius) of NGC 1068 at a spatial resolution of 8 pc, using integral field spectroscopy in the near-infrared. We have applied the technique of spectral synthesis to data obtained with the instrument NIFS and the adaptive optics module ALTAIR at the Gemini North Telescope. Two episodes of recent star formation are found to dominate the stellar population contribution: the first occurred 300 Myr ago, extending over most of the nuclear region; the second occurred just 30 Myr ago, in a ring-like structure at ≈100 pc from the nucleus, where it is coincident with an expanding ring of H2 emission. Inside the ring, where a decrease in the stellar velocity dispersion is observed, the stellar population is dominated by the 300 Myr age component. In the inner 35 pc, the oldest age component (age ≥ 2 Gyr) dominates the mass, while the flux is dominated by blackbody components with temperatures in the range 700 K ≤ T ≤ 800 K which we attribute to the dusty torus. We also find some contribution from blackbody and power-law components beyond the nucleus which we attribute to dust emission and scattered light.application/pdfengThe astrophysical journal. Bristol. Vol. 755, no. 2 (Aug. 2012), 87, 11 p.Galaxias seyfertGalaxies: bulgesGalaxies: individual (NGC 1068)Galaxies: kinematics and dynamicsGalaxies: nucleiGalaxies: seyfertGalaxies: stellar contentTwo-dimensional mapping of young stars in the inner 180 pc of NGC 1068 : correlation with molecular gas ring and stellar kinematicsEstrangeiroinfo: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:UFRGSORIGINAL000869124.pdf000869124.pdfTexto completo (inglês)application/pdf967363http://www.lume.ufrgs.br/bitstream/10183/109057/1/000869124.pdfe052626fcecf79d6b7621af9363c4552MD51TEXT000869124.pdf.txt000869124.pdf.txtExtracted Texttext/plain52841http://www.lume.ufrgs.br/bitstream/10183/109057/2/000869124.pdf.txt4151f93a8fa33377bdf3d97738b71236MD52THUMBNAIL000869124.pdf.jpg000869124.pdf.jpgGenerated Thumbnailimage/jpeg2125http://www.lume.ufrgs.br/bitstream/10183/109057/3/000869124.pdf.jpg82bdc4be95c0fc954affaa452619d5ffMD5310183/1090572023-10-01 03:37:43.102471oai:www.lume.ufrgs.br:10183/109057Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-10-01T06:37:43Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Two-dimensional mapping of young stars in the inner 180 pc of NGC 1068 : correlation with molecular gas ring and stellar kinematics |
title |
Two-dimensional mapping of young stars in the inner 180 pc of NGC 1068 : correlation with molecular gas ring and stellar kinematics |
spellingShingle |
Two-dimensional mapping of young stars in the inner 180 pc of NGC 1068 : correlation with molecular gas ring and stellar kinematics Storchi-Bergmann, Thaisa Galaxias seyfert Galaxies: bulges Galaxies: individual (NGC 1068) Galaxies: kinematics and dynamics Galaxies: nuclei Galaxies: seyfert Galaxies: stellar content |
title_short |
Two-dimensional mapping of young stars in the inner 180 pc of NGC 1068 : correlation with molecular gas ring and stellar kinematics |
title_full |
Two-dimensional mapping of young stars in the inner 180 pc of NGC 1068 : correlation with molecular gas ring and stellar kinematics |
title_fullStr |
Two-dimensional mapping of young stars in the inner 180 pc of NGC 1068 : correlation with molecular gas ring and stellar kinematics |
title_full_unstemmed |
Two-dimensional mapping of young stars in the inner 180 pc of NGC 1068 : correlation with molecular gas ring and stellar kinematics |
title_sort |
Two-dimensional mapping of young stars in the inner 180 pc of NGC 1068 : correlation with molecular gas ring and stellar kinematics |
author |
Storchi-Bergmann, Thaisa |
author_facet |
Storchi-Bergmann, Thaisa Riffel, Rogemar André Riffel, Rogério Diniz, Marlon Rodrigo Vale, Tibério Borges McGregor, Peter J. |
author_role |
author |
author2 |
Riffel, Rogemar André Riffel, Rogério Diniz, Marlon Rodrigo Vale, Tibério Borges McGregor, Peter J. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Storchi-Bergmann, Thaisa Riffel, Rogemar André Riffel, Rogério Diniz, Marlon Rodrigo Vale, Tibério Borges McGregor, Peter J. |
dc.subject.por.fl_str_mv |
Galaxias seyfert |
topic |
Galaxias seyfert Galaxies: bulges Galaxies: individual (NGC 1068) Galaxies: kinematics and dynamics Galaxies: nuclei Galaxies: seyfert Galaxies: stellar content |
dc.subject.eng.fl_str_mv |
Galaxies: bulges Galaxies: individual (NGC 1068) Galaxies: kinematics and dynamics Galaxies: nuclei Galaxies: seyfert Galaxies: stellar content |
description |
We report the first two-dimensional mapping of the stellar population and non-stellar continua within the inner 180 pc (radius) of NGC 1068 at a spatial resolution of 8 pc, using integral field spectroscopy in the near-infrared. We have applied the technique of spectral synthesis to data obtained with the instrument NIFS and the adaptive optics module ALTAIR at the Gemini North Telescope. Two episodes of recent star formation are found to dominate the stellar population contribution: the first occurred 300 Myr ago, extending over most of the nuclear region; the second occurred just 30 Myr ago, in a ring-like structure at ≈100 pc from the nucleus, where it is coincident with an expanding ring of H2 emission. Inside the ring, where a decrease in the stellar velocity dispersion is observed, the stellar population is dominated by the 300 Myr age component. In the inner 35 pc, the oldest age component (age ≥ 2 Gyr) dominates the mass, while the flux is dominated by blackbody components with temperatures in the range 700 K ≤ T ≤ 800 K which we attribute to the dusty torus. We also find some contribution from blackbody and power-law components beyond the nucleus which we attribute to dust emission and scattered light. |
publishDate |
2012 |
dc.date.issued.fl_str_mv |
2012 |
dc.date.accessioned.fl_str_mv |
2015-01-20T02:15:16Z |
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 |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/109057 |
dc.identifier.issn.pt_BR.fl_str_mv |
0004-637X |
dc.identifier.nrb.pt_BR.fl_str_mv |
000869124 |
identifier_str_mv |
0004-637X 000869124 |
url |
http://hdl.handle.net/10183/109057 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The astrophysical journal. Bristol. Vol. 755, no. 2 (Aug. 2012), 87, 11 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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