The lenticular galaxy NGC3607 : stellar population, metallicity, and ionised gas
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/99261 |
Resumo: | Aims. In this work we derive clues to the formation scenario and ionisation source of the lenticular galaxy NGC3607 by means of metallicity gradients, stellar population, and emission lines properties. Methods. We work with long-slit spectroscopy from which we (i) study the radial distribution of the equivalent widths of conspicuous metallic absorption features; (ii) make inferences about the star formation history (with a stellar population synthesis algorithm); and (iii) investigate the ionisation source responsible for a few strong emission lines. Results. Negative radial gradients are observed for most of the absorption features of NGC3607. Compared to the external parts, the central region has a deficiency of alpha elements and higher metallicity, which implies different star formation histories in both regions. At least three star formation episodes are detected, with ages within 1–13 Gyr. The dynamical mass and the Mg2 gradient slope are consistent with mergers being important contributors to the formation mechanism of NGC3607, a scenario consistent with the star formation episodes.. Emission-line ratios indicate a LINER at the centre of NGC3607. Contribution of hot, old stars to the gas ionisation outside the central region is detected. |
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Rickes, Mauro Cristian GarciaPastoriza, Miriani GriseldaBonatto, Charles Jose2014-08-08T02:07:03Z20090004-6361http://hdl.handle.net/10183/99261000827375Aims. In this work we derive clues to the formation scenario and ionisation source of the lenticular galaxy NGC3607 by means of metallicity gradients, stellar population, and emission lines properties. Methods. We work with long-slit spectroscopy from which we (i) study the radial distribution of the equivalent widths of conspicuous metallic absorption features; (ii) make inferences about the star formation history (with a stellar population synthesis algorithm); and (iii) investigate the ionisation source responsible for a few strong emission lines. Results. Negative radial gradients are observed for most of the absorption features of NGC3607. Compared to the external parts, the central region has a deficiency of alpha elements and higher metallicity, which implies different star formation histories in both regions. At least three star formation episodes are detected, with ages within 1–13 Gyr. The dynamical mass and the Mg2 gradient slope are consistent with mergers being important contributors to the formation mechanism of NGC3607, a scenario consistent with the star formation episodes.. Emission-line ratios indicate a LINER at the centre of NGC3607. Contribution of hot, old stars to the gas ionisation outside the central region is detected.application/pdfengAstronomy and astrophysics. Les Ulis. Vol. 505, no. 1 (Oct. 2009), p. 73-81Formacao de estrelasGaláxias ativasEspectros astronômicosGalaxies: formationGalaxies: activeGalaxies: individual: NGC3607The lenticular galaxy NGC3607 : stellar population, metallicity, and ionised gasEstrangeiroinfo: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:UFRGSORIGINAL000827375.pdf000827375.pdfTexto completo (inglês)application/pdf349488http://www.lume.ufrgs.br/bitstream/10183/99261/1/000827375.pdf85dde28660f176565ada596009da226dMD51TEXT000827375.pdf.txt000827375.pdf.txtExtracted Texttext/plain41206http://www.lume.ufrgs.br/bitstream/10183/99261/2/000827375.pdf.txt25b3590ea6f4a9e3f5fa731560bcb9bfMD52THUMBNAIL000827375.pdf.jpg000827375.pdf.jpgGenerated Thumbnailimage/jpeg2000http://www.lume.ufrgs.br/bitstream/10183/99261/3/000827375.pdf.jpga82e69e3221f08727f0a17912db37642MD5310183/992612023-07-15 03:27:04.212029oai:www.lume.ufrgs.br:10183/99261Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-15T06:27:04Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
The lenticular galaxy NGC3607 : stellar population, metallicity, and ionised gas |
title |
The lenticular galaxy NGC3607 : stellar population, metallicity, and ionised gas |
spellingShingle |
The lenticular galaxy NGC3607 : stellar population, metallicity, and ionised gas Rickes, Mauro Cristian Garcia Formacao de estrelas Galáxias ativas Espectros astronômicos Galaxies: formation Galaxies: active Galaxies: individual: NGC3607 |
title_short |
The lenticular galaxy NGC3607 : stellar population, metallicity, and ionised gas |
title_full |
The lenticular galaxy NGC3607 : stellar population, metallicity, and ionised gas |
title_fullStr |
The lenticular galaxy NGC3607 : stellar population, metallicity, and ionised gas |
title_full_unstemmed |
The lenticular galaxy NGC3607 : stellar population, metallicity, and ionised gas |
title_sort |
The lenticular galaxy NGC3607 : stellar population, metallicity, and ionised gas |
author |
Rickes, Mauro Cristian Garcia |
author_facet |
Rickes, Mauro Cristian Garcia Pastoriza, Miriani Griselda Bonatto, Charles Jose |
author_role |
author |
author2 |
Pastoriza, Miriani Griselda Bonatto, Charles Jose |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Rickes, Mauro Cristian Garcia Pastoriza, Miriani Griselda Bonatto, Charles Jose |
dc.subject.por.fl_str_mv |
Formacao de estrelas Galáxias ativas Espectros astronômicos |
topic |
Formacao de estrelas Galáxias ativas Espectros astronômicos Galaxies: formation Galaxies: active Galaxies: individual: NGC3607 |
dc.subject.eng.fl_str_mv |
Galaxies: formation Galaxies: active Galaxies: individual: NGC3607 |
description |
Aims. In this work we derive clues to the formation scenario and ionisation source of the lenticular galaxy NGC3607 by means of metallicity gradients, stellar population, and emission lines properties. Methods. We work with long-slit spectroscopy from which we (i) study the radial distribution of the equivalent widths of conspicuous metallic absorption features; (ii) make inferences about the star formation history (with a stellar population synthesis algorithm); and (iii) investigate the ionisation source responsible for a few strong emission lines. Results. Negative radial gradients are observed for most of the absorption features of NGC3607. Compared to the external parts, the central region has a deficiency of alpha elements and higher metallicity, which implies different star formation histories in both regions. At least three star formation episodes are detected, with ages within 1–13 Gyr. The dynamical mass and the Mg2 gradient slope are consistent with mergers being important contributors to the formation mechanism of NGC3607, a scenario consistent with the star formation episodes.. Emission-line ratios indicate a LINER at the centre of NGC3607. Contribution of hot, old stars to the gas ionisation outside the central region is detected. |
publishDate |
2009 |
dc.date.issued.fl_str_mv |
2009 |
dc.date.accessioned.fl_str_mv |
2014-08-08T02:07:03Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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publishedVersion |
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000827375 |
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dc.relation.ispartof.pt_BR.fl_str_mv |
Astronomy and astrophysics. Les Ulis. Vol. 505, no. 1 (Oct. 2009), p. 73-81 |
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openAccess |
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