Stellar population properties of ETGs in compact groups of galaxies
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/211779 |
Resumo: | We 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. |
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Moura, TatianaCarvalho, Reinaldo Ramos deRembold, Sandro BarbozaTrevisan, MarinaRibeiro, Andre Luis BatistaPérez Villegas, Maria de Los AngelesLa Barbera, FrancescoStalder Díaz, Diego HerbinRosa, Reinaldo Roberto2020-07-11T03:52:44Z20200035-8711http://hdl.handle.net/10183/211779001115348We 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.application/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 493, no. 3 (Apr. 2020), p. 3238-3254Populacoes estelaresEvolucao galaticaGalaxies: activeGalaxies: evolutionGalaxies: groups: generalGalaxies: interactionsGalaxies: stellar contentStellar population properties of ETGs in compact groups of galaxiesEstrangeiroinfo: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:UFRGSTEXT001115348.pdf.txt001115348.pdf.txtExtracted Texttext/plain81426http://www.lume.ufrgs.br/bitstream/10183/211779/2/001115348.pdf.txt6f987992de2e0807919666f2a92c5425MD52ORIGINAL001115348.pdfTexto completo (inglês)application/pdf1665010http://www.lume.ufrgs.br/bitstream/10183/211779/1/001115348.pdf2b707470137a7a350c086fb2b78ef677MD5110183/2117792023-08-11 03:54:27.659449oai:www.lume.ufrgs.br:10183/211779Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-08-11T06:54:27Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Stellar population properties of ETGs in compact groups of galaxies |
title |
Stellar population properties of ETGs in compact groups of galaxies |
spellingShingle |
Stellar population properties of ETGs in compact groups of galaxies Moura, Tatiana Populacoes estelares Evolucao galatica Galaxies: active Galaxies: evolution Galaxies: groups: general Galaxies: interactions Galaxies: stellar content |
title_short |
Stellar population properties of ETGs in compact groups of galaxies |
title_full |
Stellar population properties of ETGs in compact groups of galaxies |
title_fullStr |
Stellar population properties of ETGs in compact groups of galaxies |
title_full_unstemmed |
Stellar population properties of ETGs in compact groups of galaxies |
title_sort |
Stellar population properties of ETGs in compact groups of galaxies |
author |
Moura, Tatiana |
author_facet |
Moura, Tatiana Carvalho, Reinaldo Ramos de Rembold, Sandro Barboza Trevisan, Marina Ribeiro, Andre Luis Batista Pérez Villegas, Maria de Los Angeles La Barbera, Francesco Stalder Díaz, Diego Herbin Rosa, Reinaldo Roberto |
author_role |
author |
author2 |
Carvalho, Reinaldo Ramos de Rembold, Sandro Barboza Trevisan, Marina Ribeiro, Andre Luis Batista Pérez Villegas, Maria de Los Angeles La Barbera, Francesco Stalder Díaz, Diego Herbin Rosa, Reinaldo Roberto |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Moura, Tatiana Carvalho, Reinaldo Ramos de Rembold, Sandro Barboza Trevisan, Marina Ribeiro, Andre Luis Batista Pérez Villegas, Maria de Los Angeles La Barbera, Francesco Stalder Díaz, Diego Herbin Rosa, Reinaldo Roberto |
dc.subject.por.fl_str_mv |
Populacoes estelares Evolucao galatica |
topic |
Populacoes estelares Evolucao galatica Galaxies: active Galaxies: evolution Galaxies: groups: general Galaxies: interactions Galaxies: stellar content |
dc.subject.eng.fl_str_mv |
Galaxies: active Galaxies: evolution Galaxies: groups: general Galaxies: interactions Galaxies: stellar content |
description |
We 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. |
publishDate |
2020 |
dc.date.accessioned.fl_str_mv |
2020-07-11T03:52:44Z |
dc.date.issued.fl_str_mv |
2020 |
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/10183/211779 |
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0035-8711 |
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001115348 |
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0035-8711 001115348 |
url |
http://hdl.handle.net/10183/211779 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Monthly notices of the royal astronomical society. Oxford. Vol. 493, no. 3 (Apr. 2020), p. 3238-3254 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
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