Kinematics and physical properties of southern interacting galaxies : the minor merger AM 2306–721

Detalhes bibliográficos
Autor(a) principal: Krabbe, Angela Cristina
Data de Publicação: 2008
Outros Autores: Pastoriza, Miriani Griselda, Winge, Claudia, Rodrigues, Irapuan, Ferreiro, Diego L.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/90281
Resumo: We present an observational study about the effects of the interactions in the kinematics, stellar population and abundances of the components of the galaxy pair AM2306-721. Rotation curves for the main and companion galaxies were obtained, showing a deprojected velocity amplitude of 175 and 185 km s-ˡ, respectively. The interaction between the main and companion galaxies was modelled using numerical N-body/hydrodynamical simulations, with the result indicating that the current stage of the merger would be about 250 Myr after perigalacticum. The spatial variation in the distribution of the stellar-population components in both galaxies was analysed by fitting combinations of stellar-population models of different age groups. The central region of main galaxy is dominated by an old (5–10 Gyr) population, while significant contributions from a young (200 Myr) and intermediate (1 Gyr) components are found in the disc, and being enhanced in the direction of the tidal features. The stellar population of the companion galaxy is overall much younger, being dominated by components with 1 Gyr or less, quite widely spread over the whole disc. Spatial profiles of the oxygen abundance were obtained from a grid of photoionization models using the R23 line ratio. The disc of the main galaxy shows a clear radial gradient, while the companion galaxy presents oxygen abundance relatively homogeneous across the disc. The absence of an abundance gradient in the secondary galaxy is interpreted in terms of mixing by gas flows from the outer parts to the centre of the galaxy due to the gravitational interaction with the more massive primary.
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spelling Krabbe, Angela CristinaPastoriza, Miriani GriseldaWinge, ClaudiaRodrigues, IrapuanFerreiro, Diego L.2014-04-03T01:51:29Z20080035-8711http://hdl.handle.net/10183/90281000680018We present an observational study about the effects of the interactions in the kinematics, stellar population and abundances of the components of the galaxy pair AM2306-721. Rotation curves for the main and companion galaxies were obtained, showing a deprojected velocity amplitude of 175 and 185 km s-ˡ, respectively. The interaction between the main and companion galaxies was modelled using numerical N-body/hydrodynamical simulations, with the result indicating that the current stage of the merger would be about 250 Myr after perigalacticum. The spatial variation in the distribution of the stellar-population components in both galaxies was analysed by fitting combinations of stellar-population models of different age groups. The central region of main galaxy is dominated by an old (5–10 Gyr) population, while significant contributions from a young (200 Myr) and intermediate (1 Gyr) components are found in the disc, and being enhanced in the direction of the tidal features. The stellar population of the companion galaxy is overall much younger, being dominated by components with 1 Gyr or less, quite widely spread over the whole disc. Spatial profiles of the oxygen abundance were obtained from a grid of photoionization models using the R23 line ratio. The disc of the main galaxy shows a clear radial gradient, while the companion galaxy presents oxygen abundance relatively homogeneous across the disc. The absence of an abundance gradient in the secondary galaxy is interpreted in terms of mixing by gas flows from the outer parts to the centre of the galaxy due to the gravitational interaction with the more massive primary.application/pdfengMonthly notices of the Royal Astronomical Society. Oxford. Vol. 389, no. 4 (Oct. 2008), p. 1593-1604Populacoes estelaresFormacao de estrelasGaláxiasGalaxias StarburstCinemáticaPropriedades físicasMetalicidadeGalaxies: abundancesGalaxies: generalGalaxies: interactionsGalaxies: kinematics and dynamicsGalaxies: starburstGalaxies: stellar contentKinematics and physical properties of southern interacting galaxies : the minor merger AM 2306–721Estrangeiroinfo: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:UFRGSORIGINAL000680018.pdf000680018.pdfTexto completo (inglês)application/pdf4961665http://www.lume.ufrgs.br/bitstream/10183/90281/1/000680018.pdf231523ef1aa9e6ff5ba95d8f823612e0MD51TEXT000680018.pdf.txt000680018.pdf.txtExtracted Texttext/plain52829http://www.lume.ufrgs.br/bitstream/10183/90281/2/000680018.pdf.txt2afda39ab1d4017c00e838f9d7b57ad6MD52THUMBNAIL000680018.pdf.jpg000680018.pdf.jpgGenerated Thumbnailimage/jpeg2010http://www.lume.ufrgs.br/bitstream/10183/90281/3/000680018.pdf.jpgb246a5b635d896e3ae023688e2c67847MD5310183/902812024-09-04 06:27:20.6935oai:www.lume.ufrgs.br:10183/90281Repositório InstitucionalPUBhttps://lume.ufrgs.br/oai/requestlume@ufrgs.bropendoar:2024-09-04T09:27:20Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Kinematics and physical properties of southern interacting galaxies : the minor merger AM 2306–721
title Kinematics and physical properties of southern interacting galaxies : the minor merger AM 2306–721
spellingShingle Kinematics and physical properties of southern interacting galaxies : the minor merger AM 2306–721
Krabbe, Angela Cristina
Populacoes estelares
Formacao de estrelas
Galáxias
Galaxias Starburst
Cinemática
Propriedades físicas
Metalicidade
Galaxies: abundances
Galaxies: general
Galaxies: interactions
Galaxies: kinematics and dynamics
Galaxies: starburst
Galaxies: stellar content
title_short Kinematics and physical properties of southern interacting galaxies : the minor merger AM 2306–721
title_full Kinematics and physical properties of southern interacting galaxies : the minor merger AM 2306–721
title_fullStr Kinematics and physical properties of southern interacting galaxies : the minor merger AM 2306–721
title_full_unstemmed Kinematics and physical properties of southern interacting galaxies : the minor merger AM 2306–721
title_sort Kinematics and physical properties of southern interacting galaxies : the minor merger AM 2306–721
author Krabbe, Angela Cristina
author_facet Krabbe, Angela Cristina
Pastoriza, Miriani Griselda
Winge, Claudia
Rodrigues, Irapuan
Ferreiro, Diego L.
author_role author
author2 Pastoriza, Miriani Griselda
Winge, Claudia
Rodrigues, Irapuan
Ferreiro, Diego L.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Krabbe, Angela Cristina
Pastoriza, Miriani Griselda
Winge, Claudia
Rodrigues, Irapuan
Ferreiro, Diego L.
dc.subject.por.fl_str_mv Populacoes estelares
Formacao de estrelas
Galáxias
Galaxias Starburst
Cinemática
Propriedades físicas
Metalicidade
topic Populacoes estelares
Formacao de estrelas
Galáxias
Galaxias Starburst
Cinemática
Propriedades físicas
Metalicidade
Galaxies: abundances
Galaxies: general
Galaxies: interactions
Galaxies: kinematics and dynamics
Galaxies: starburst
Galaxies: stellar content
dc.subject.eng.fl_str_mv Galaxies: abundances
Galaxies: general
Galaxies: interactions
Galaxies: kinematics and dynamics
Galaxies: starburst
Galaxies: stellar content
description We present an observational study about the effects of the interactions in the kinematics, stellar population and abundances of the components of the galaxy pair AM2306-721. Rotation curves for the main and companion galaxies were obtained, showing a deprojected velocity amplitude of 175 and 185 km s-ˡ, respectively. The interaction between the main and companion galaxies was modelled using numerical N-body/hydrodynamical simulations, with the result indicating that the current stage of the merger would be about 250 Myr after perigalacticum. The spatial variation in the distribution of the stellar-population components in both galaxies was analysed by fitting combinations of stellar-population models of different age groups. The central region of main galaxy is dominated by an old (5–10 Gyr) population, while significant contributions from a young (200 Myr) and intermediate (1 Gyr) components are found in the disc, and being enhanced in the direction of the tidal features. The stellar population of the companion galaxy is overall much younger, being dominated by components with 1 Gyr or less, quite widely spread over the whole disc. Spatial profiles of the oxygen abundance were obtained from a grid of photoionization models using the R23 line ratio. The disc of the main galaxy shows a clear radial gradient, while the companion galaxy presents oxygen abundance relatively homogeneous across the disc. The absence of an abundance gradient in the secondary galaxy is interpreted in terms of mixing by gas flows from the outer parts to the centre of the galaxy due to the gravitational interaction with the more massive primary.
publishDate 2008
dc.date.issued.fl_str_mv 2008
dc.date.accessioned.fl_str_mv 2014-04-03T01:51:29Z
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/90281
dc.identifier.issn.pt_BR.fl_str_mv 0035-8711
dc.identifier.nrb.pt_BR.fl_str_mv 000680018
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dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv Monthly notices of the Royal Astronomical Society. Oxford. Vol. 389, no. 4 (Oct. 2008), p. 1593-1604
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