Galaxy cluster mergers as triggers for the formation of jellyfish galaxies : case study of the A901/2 system
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/195852 |
Resumo: | The A901/2 system is a rare case of galaxy cluster interaction, in which two galaxy clusters and two smaller groups are seen in route of collision with each other simultaneously. Within each of the four substructures, several galaxies with features indicative of jellyfish morphologies have been observed. In this paper, we propose a hydrodynamic model for the merger as a whole, compatible with its diffuse X-ray emission, and correlate the gas properties in this model with the locations of the jellyfish galaxy candidates in the real system. We find that jellyfish galaxies seem to be preferentially located near a boundary inside each subcluster where diffuse gas moving along with the subcluster and diffuse gas from the remainder of the system meet. The velocity change in those boundaries is such that a factor of up to ~1000 increase in the ram pressure takes place within a few hundred kpc, which could trigger the high rate of gas loss necessary for a jellyfish morphology to emerge. A theoretical treatment of ram pressure stripping in the environment of galaxy cluster mergers has not been presented in the literature so far; we propose that this could be a common scenario for the formation of jellyfish morphologies in such systems. |
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Ruggiero, RafaelMachado, Rubens Eduardo GarciaOliveira, Fernanda Vitória Roman deChies-Santos, Ana LeonorLima Neto, Gastão Cesar BierrenbachDoubrawa, LiaRodríguez del Pino, Bruno2019-06-18T02:34:31Z20190035-8711http://hdl.handle.net/10183/195852001094515The A901/2 system is a rare case of galaxy cluster interaction, in which two galaxy clusters and two smaller groups are seen in route of collision with each other simultaneously. Within each of the four substructures, several galaxies with features indicative of jellyfish morphologies have been observed. In this paper, we propose a hydrodynamic model for the merger as a whole, compatible with its diffuse X-ray emission, and correlate the gas properties in this model with the locations of the jellyfish galaxy candidates in the real system. We find that jellyfish galaxies seem to be preferentially located near a boundary inside each subcluster where diffuse gas moving along with the subcluster and diffuse gas from the remainder of the system meet. The velocity change in those boundaries is such that a factor of up to ~1000 increase in the ram pressure takes place within a few hundred kpc, which could trigger the high rate of gas loss necessary for a jellyfish morphology to emerge. A theoretical treatment of ram pressure stripping in the environment of galaxy cluster mergers has not been presented in the literature so far; we propose that this could be a common scenario for the formation of jellyfish morphologies in such systems.application/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 484, no. 1 (Mar. 2019), p. 906-914Aglomerados de galaxiasFormacao de galaxiasSimulação numéricaMethods: numericalGalaxies: clusters: generalGalaxies: interactionsGalaxy cluster mergers as triggers for the formation of jellyfish galaxies : case study of the A901/2 systemEstrangeiroinfo: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:UFRGSTEXT001094515.pdf.txt001094515.pdf.txtExtracted Texttext/plain45973http://www.lume.ufrgs.br/bitstream/10183/195852/2/001094515.pdf.txt49c703ff7bf4e170a11008eceaafa17bMD52ORIGINAL001094515.pdfTexto completo (inglês)application/pdf11050218http://www.lume.ufrgs.br/bitstream/10183/195852/1/001094515.pdf8d38fa1eec106631629ef4aa5253ba44MD5110183/1958522019-06-19 02:33:57.684491oai:www.lume.ufrgs.br:10183/195852Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2019-06-19T05:33:57Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Galaxy cluster mergers as triggers for the formation of jellyfish galaxies : case study of the A901/2 system |
title |
Galaxy cluster mergers as triggers for the formation of jellyfish galaxies : case study of the A901/2 system |
spellingShingle |
Galaxy cluster mergers as triggers for the formation of jellyfish galaxies : case study of the A901/2 system Ruggiero, Rafael Aglomerados de galaxias Formacao de galaxias Simulação numérica Methods: numerical Galaxies: clusters: general Galaxies: interactions |
title_short |
Galaxy cluster mergers as triggers for the formation of jellyfish galaxies : case study of the A901/2 system |
title_full |
Galaxy cluster mergers as triggers for the formation of jellyfish galaxies : case study of the A901/2 system |
title_fullStr |
Galaxy cluster mergers as triggers for the formation of jellyfish galaxies : case study of the A901/2 system |
title_full_unstemmed |
Galaxy cluster mergers as triggers for the formation of jellyfish galaxies : case study of the A901/2 system |
title_sort |
Galaxy cluster mergers as triggers for the formation of jellyfish galaxies : case study of the A901/2 system |
author |
Ruggiero, Rafael |
author_facet |
Ruggiero, Rafael Machado, Rubens Eduardo Garcia Oliveira, Fernanda Vitória Roman de Chies-Santos, Ana Leonor Lima Neto, Gastão Cesar Bierrenbach Doubrawa, Lia Rodríguez del Pino, Bruno |
author_role |
author |
author2 |
Machado, Rubens Eduardo Garcia Oliveira, Fernanda Vitória Roman de Chies-Santos, Ana Leonor Lima Neto, Gastão Cesar Bierrenbach Doubrawa, Lia Rodríguez del Pino, Bruno |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Ruggiero, Rafael Machado, Rubens Eduardo Garcia Oliveira, Fernanda Vitória Roman de Chies-Santos, Ana Leonor Lima Neto, Gastão Cesar Bierrenbach Doubrawa, Lia Rodríguez del Pino, Bruno |
dc.subject.por.fl_str_mv |
Aglomerados de galaxias Formacao de galaxias Simulação numérica |
topic |
Aglomerados de galaxias Formacao de galaxias Simulação numérica Methods: numerical Galaxies: clusters: general Galaxies: interactions |
dc.subject.eng.fl_str_mv |
Methods: numerical Galaxies: clusters: general Galaxies: interactions |
description |
The A901/2 system is a rare case of galaxy cluster interaction, in which two galaxy clusters and two smaller groups are seen in route of collision with each other simultaneously. Within each of the four substructures, several galaxies with features indicative of jellyfish morphologies have been observed. In this paper, we propose a hydrodynamic model for the merger as a whole, compatible with its diffuse X-ray emission, and correlate the gas properties in this model with the locations of the jellyfish galaxy candidates in the real system. We find that jellyfish galaxies seem to be preferentially located near a boundary inside each subcluster where diffuse gas moving along with the subcluster and diffuse gas from the remainder of the system meet. The velocity change in those boundaries is such that a factor of up to ~1000 increase in the ram pressure takes place within a few hundred kpc, which could trigger the high rate of gas loss necessary for a jellyfish morphology to emerge. A theoretical treatment of ram pressure stripping in the environment of galaxy cluster mergers has not been presented in the literature so far; we propose that this could be a common scenario for the formation of jellyfish morphologies in such systems. |
publishDate |
2019 |
dc.date.accessioned.fl_str_mv |
2019-06-18T02:34:31Z |
dc.date.issued.fl_str_mv |
2019 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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http://hdl.handle.net/10183/195852 |
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0035-8711 |
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001094515 |
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http://hdl.handle.net/10183/195852 |
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. 484, no. 1 (Mar. 2019), p. 906-914 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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