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dc.contributor.authorKrabbe, Angela Cristinapt_BR
dc.contributor.authorPastoriza, Miriani Griseldapt_BR
dc.contributor.authorWinge, Claudiapt_BR
dc.contributor.authorRodrigues, Irapuanpt_BR
dc.contributor.authorFerreiro, Diego L.pt_BR
dc.date.accessioned2014-04-03T01:51:29Zpt_BR
dc.date.issued2008pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/90281pt_BR
dc.description.abstractWe 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.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofMonthly notices of the Royal Astronomical Society. Oxford. Vol. 389, no. 4 (Oct. 2008), p. 1593-1604pt_BR
dc.rightsOpen Accessen
dc.subjectGalaxies: abundancesen
dc.subjectPopulacoes estelarespt_BR
dc.subjectFormacao de estrelaspt_BR
dc.subjectGalaxies: generalen
dc.subjectGalaxies: interactionsen
dc.subjectGaláxiaspt_BR
dc.subjectGalaxies: kinematics and dynamicsen
dc.subjectGalaxias Starburstpt_BR
dc.subjectCinemáticapt_BR
dc.subjectGalaxies: starbursten
dc.subjectGalaxies: stellar contenten
dc.subjectPropriedades físicaspt_BR
dc.subjectMetalicidadept_BR
dc.titleKinematics and physical properties of southern interacting galaxies : the minor merger AM 2306–721pt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000680018pt_BR
dc.type.originEstrangeiropt_BR


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