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dc.contributor.authorMoura, Tatianapt_BR
dc.contributor.authorCarvalho, Reinaldo Ramos dept_BR
dc.contributor.authorRembold, Sandro Barbozapt_BR
dc.contributor.authorTrevisan, Marinapt_BR
dc.contributor.authorRibeiro, Andre Luis Batistapt_BR
dc.contributor.authorPérez Villegas, Maria de Los Angelespt_BR
dc.contributor.authorLa Barbera, Francescopt_BR
dc.contributor.authorStalder Díaz, Diego Herbinpt_BR
dc.contributor.authorRosa, Reinaldo Robertopt_BR
dc.date.accessioned2020-07-11T03:52:44Zpt_BR
dc.date.issued2020pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/211779pt_BR
dc.description.abstractWe present results on the study of the stellar population in early-type galaxies (ETGs) belonging to 151 compact groups (CGs). We also selected a field sample composed of 846 ETGs to investigate environmental effects on galaxy evolution. We find that the dependences of mean stellar ages, [Z/H] and [α/Fe] on central stellar velocity dispersion are similar, regardless where the ETG resides, CGs or field. When compared to the sample of centrals and satellites from the literature, we find that ETGs in CGs behave similarly to centrals, especially those embedded in low-mass haloes (Mh<1012.5M⊙). Except for the low-mass limit, where field galaxies present a star-forming signature, not seen in CGs, the ionization agent of the gas in CG and field galaxies seem to be similar due to hot, evolved low-mass stars. However, field ETGs present an excess of H α emission relative to ETGs in CGs. Additionally, we performed a dynamical analysis, which shows that CGs present a bimodality in the group velocity dispersion distribution – a high- and low-σ mode. Our results indicate that high-σ groups have a smaller fraction of spirals, shorter crossing times, and a more luminous population of galaxies than the low-σ groups. It is important to emphasize that our findings point to a small environmental impact on galaxies located in CGs. The only evidence we find is the change in gas content, suggesting environmentally driven gas loss.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofMonthly notices of the royal astronomical society. Oxford. Vol. 493, no. 3 (Apr. 2020), p. 3238-3254pt_BR
dc.rightsOpen Accessen
dc.subjectPopulacoes estelarespt_BR
dc.subjectGalaxies: activeen
dc.subjectEvolucao galaticapt_BR
dc.subjectGalaxies: evolutionen
dc.subjectGalaxies: groups: generalen
dc.subjectGalaxies: interactionsen
dc.subjectGalaxies: stellar contenten
dc.titleStellar population properties of ETGs in compact groups of galaxiespt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001115348pt_BR
dc.type.originEstrangeiropt_BR


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