An environmental dependence of the physical and structural properties in the Hydra cluster galaxies

Detalhes bibliográficos
Autor(a) principal: Dias, Ciria Lima
Data de Publicação: 2021
Outros Autores: Chies-Santos, Ana Leonor, Schoenell, William
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/218562
Resumo: The nearby Hydra cluster (∼50 Mpc) is an ideal laboratory to understand, in detail, the influence of the environment on the morphology and quenching of galaxies in dense environments. We study the Hydra cluster galaxies in the inner regions (1R200) of the cluster using data from the Southern Photometric Local Universe Survey, which uses 12 narrow and broad-band filters in the visible region of the spectrum. We analyse structural (Sérsic index, effective radius) and physical (colours, stellar masses, and star formation rates) properties. Based on this analysis, we find that ∼88 per cent of the Hydra cluster galaxies are quenched. Using the Dressler–Schectman test approach, we also find that the cluster shows possible substructures. Our analysis of the phase-space diagram together with density-based spatial clustering algorithm indicates that Hydra shows an additional substructure that appears to be in front of the cluster centre, which is still falling into it. Our results, thus, suggest that the Hydra cluster might not be relaxed. We analyse the median Sérsic index as a function of wavelength and find that for red [(u − r) ≥2.3] and early-type galaxies it displays a slight increase towards redder filters (13 and 18 per cent, for red and early type, respectively), whereas for blue + green [(u − r)<2.3] galaxies it remains constant. Late-type galaxies show a small decrease of the median Sérsic index towards redder filters. Also, the Sérsic index of galaxies, and thus their structural properties, do not significantly vary as a function of clustercentric distance and density within the cluster; and this is the case regardless of the filter.
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spelling Dias, Ciria LimaChies-Santos, Ana LeonorSchoenell, William2021-03-10T04:22:41Z20210035-8711http://hdl.handle.net/10183/218562001122423The nearby Hydra cluster (∼50 Mpc) is an ideal laboratory to understand, in detail, the influence of the environment on the morphology and quenching of galaxies in dense environments. We study the Hydra cluster galaxies in the inner regions (1R200) of the cluster using data from the Southern Photometric Local Universe Survey, which uses 12 narrow and broad-band filters in the visible region of the spectrum. We analyse structural (Sérsic index, effective radius) and physical (colours, stellar masses, and star formation rates) properties. Based on this analysis, we find that ∼88 per cent of the Hydra cluster galaxies are quenched. Using the Dressler–Schectman test approach, we also find that the cluster shows possible substructures. Our analysis of the phase-space diagram together with density-based spatial clustering algorithm indicates that Hydra shows an additional substructure that appears to be in front of the cluster centre, which is still falling into it. Our results, thus, suggest that the Hydra cluster might not be relaxed. We analyse the median Sérsic index as a function of wavelength and find that for red [(u − r) ≥2.3] and early-type galaxies it displays a slight increase towards redder filters (13 and 18 per cent, for red and early type, respectively), whereas for blue + green [(u − r)<2.3] galaxies it remains constant. Late-type galaxies show a small decrease of the median Sérsic index towards redder filters. Also, the Sérsic index of galaxies, and thus their structural properties, do not significantly vary as a function of clustercentric distance and density within the cluster; and this is the case regardless of the filter.application/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 500, no. 1 (Jan. 2021), p. 1323–1339Aglomerados de galaxiasEvolucao galaticaFotometria astronômicaGalaxies : Clusters : GeneralGalaxies : Fundamental parametersGalaxies : StructureAn environmental dependence of the physical and structural properties in the Hydra cluster 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:UFRGSTEXT001122423.pdf.txt001122423.pdf.txtExtracted Texttext/plain90666http://www.lume.ufrgs.br/bitstream/10183/218562/2/001122423.pdf.txt3aa78b1dc62b76974b6c1147733e885dMD52ORIGINAL001122423.pdfTexto completo (inglês)application/pdf7631551http://www.lume.ufrgs.br/bitstream/10183/218562/1/001122423.pdfe9676a2d71d09ecce2cdb91cdae212e4MD5110183/2185622021-11-20 06:12:03.099811oai:www.lume.ufrgs.br:10183/218562Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-11-20T08:12:03Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv An environmental dependence of the physical and structural properties in the Hydra cluster galaxies
title An environmental dependence of the physical and structural properties in the Hydra cluster galaxies
spellingShingle An environmental dependence of the physical and structural properties in the Hydra cluster galaxies
Dias, Ciria Lima
Aglomerados de galaxias
Evolucao galatica
Fotometria astronômica
Galaxies : Clusters : General
Galaxies : Fundamental parameters
Galaxies : Structure
title_short An environmental dependence of the physical and structural properties in the Hydra cluster galaxies
title_full An environmental dependence of the physical and structural properties in the Hydra cluster galaxies
title_fullStr An environmental dependence of the physical and structural properties in the Hydra cluster galaxies
title_full_unstemmed An environmental dependence of the physical and structural properties in the Hydra cluster galaxies
title_sort An environmental dependence of the physical and structural properties in the Hydra cluster galaxies
author Dias, Ciria Lima
author_facet Dias, Ciria Lima
Chies-Santos, Ana Leonor
Schoenell, William
author_role author
author2 Chies-Santos, Ana Leonor
Schoenell, William
author2_role author
author
dc.contributor.author.fl_str_mv Dias, Ciria Lima
Chies-Santos, Ana Leonor
Schoenell, William
dc.subject.por.fl_str_mv Aglomerados de galaxias
Evolucao galatica
Fotometria astronômica
topic Aglomerados de galaxias
Evolucao galatica
Fotometria astronômica
Galaxies : Clusters : General
Galaxies : Fundamental parameters
Galaxies : Structure
dc.subject.eng.fl_str_mv Galaxies : Clusters : General
Galaxies : Fundamental parameters
Galaxies : Structure
description The nearby Hydra cluster (∼50 Mpc) is an ideal laboratory to understand, in detail, the influence of the environment on the morphology and quenching of galaxies in dense environments. We study the Hydra cluster galaxies in the inner regions (1R200) of the cluster using data from the Southern Photometric Local Universe Survey, which uses 12 narrow and broad-band filters in the visible region of the spectrum. We analyse structural (Sérsic index, effective radius) and physical (colours, stellar masses, and star formation rates) properties. Based on this analysis, we find that ∼88 per cent of the Hydra cluster galaxies are quenched. Using the Dressler–Schectman test approach, we also find that the cluster shows possible substructures. Our analysis of the phase-space diagram together with density-based spatial clustering algorithm indicates that Hydra shows an additional substructure that appears to be in front of the cluster centre, which is still falling into it. Our results, thus, suggest that the Hydra cluster might not be relaxed. We analyse the median Sérsic index as a function of wavelength and find that for red [(u − r) ≥2.3] and early-type galaxies it displays a slight increase towards redder filters (13 and 18 per cent, for red and early type, respectively), whereas for blue + green [(u − r)<2.3] galaxies it remains constant. Late-type galaxies show a small decrease of the median Sérsic index towards redder filters. Also, the Sérsic index of galaxies, and thus their structural properties, do not significantly vary as a function of clustercentric distance and density within the cluster; and this is the case regardless of the filter.
publishDate 2021
dc.date.accessioned.fl_str_mv 2021-03-10T04:22:41Z
dc.date.issued.fl_str_mv 2021
dc.type.driver.fl_str_mv Estrangeiro
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dc.relation.ispartof.pt_BR.fl_str_mv Monthly notices of the royal astronomical society. Oxford. Vol. 500, no. 1 (Jan. 2021), p. 1323–1339
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