Fossil group origins. II. Unveiling the formation of the brightest group galaxies through their scaling relations
Context. Fossil systems are galaxy associations dominated by a relatively isolated, bright elliptical galaxy, surrounded by a group of smaller galaxies lacking L* objects. Because of this extreme environment, fossil groups (FGs) are ideal laboratories for studying the mass assembly of brightest grou...
| Autores: | , , , , , , , , , , , , , |
|---|---|
| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2012 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositório: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/420477 |
| Acesso em linha: | http://hdl.handle.net/10261/420477 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Galaxies: photometry Galaxies: structure Galaxies: evolution Galaxies: formation Galaxies: elliptical and lenticular cD Galaxies: fundamental parameters |
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España |
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Fossil group origins. II. Unveiling the formation of the brightest group galaxies through their scaling relations |
| title |
Fossil group origins. II. Unveiling the formation of the brightest group galaxies through their scaling relations |
| spellingShingle |
Fossil group origins. II. Unveiling the formation of the brightest group galaxies through their scaling relations Méndez-Abreu, J. Galaxies: photometry Galaxies: structure Galaxies: evolution Galaxies: formation Galaxies: elliptical and lenticular cD Galaxies: fundamental parameters |
| title_short |
Fossil group origins. II. Unveiling the formation of the brightest group galaxies through their scaling relations |
| title_full |
Fossil group origins. II. Unveiling the formation of the brightest group galaxies through their scaling relations |
| title_fullStr |
Fossil group origins. II. Unveiling the formation of the brightest group galaxies through their scaling relations |
| title_full_unstemmed |
Fossil group origins. II. Unveiling the formation of the brightest group galaxies through their scaling relations |
| title_sort |
Fossil group origins. II. Unveiling the formation of the brightest group galaxies through their scaling relations |
| dc.creator.none.fl_str_mv |
Méndez-Abreu, J. Aguerri, J.A.L. Barrena, R. Sánchez-Janssen, R. Boschin, W. Castro-Rodriguez, N. Corsini, E. M. Burgo, Carlos del D'Onghia, E. Girardi, M. Iglesias-Páramo, J. Napolitano, N. Vílchez Medina, José Manuel Zarattini, S. |
| author |
Méndez-Abreu, J. |
| author_facet |
Méndez-Abreu, J. Aguerri, J.A.L. Barrena, R. Sánchez-Janssen, R. Boschin, W. Castro-Rodriguez, N. Corsini, E. M. Burgo, Carlos del D'Onghia, E. Girardi, M. Iglesias-Páramo, J. Napolitano, N. Vílchez Medina, José Manuel Zarattini, S. |
| author_role |
author |
| author2 |
Aguerri, J.A.L. Barrena, R. Sánchez-Janssen, R. Boschin, W. Castro-Rodriguez, N. Corsini, E. M. Burgo, Carlos del D'Onghia, E. Girardi, M. Iglesias-Páramo, J. Napolitano, N. Vílchez Medina, José Manuel Zarattini, S. |
| author2_role |
author author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Ministerio de Ciencia e Innovación (España) Ministerio de Educación y Ciencia (España) Fundação para a Ciência e a Tecnologia (Portugal) Agenzia Spaziale Italiana Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Galaxies: photometry Galaxies: structure Galaxies: evolution Galaxies: formation Galaxies: elliptical and lenticular cD Galaxies: fundamental parameters |
| topic |
Galaxies: photometry Galaxies: structure Galaxies: evolution Galaxies: formation Galaxies: elliptical and lenticular cD Galaxies: fundamental parameters |
| description |
Context. Fossil systems are galaxy associations dominated by a relatively isolated, bright elliptical galaxy, surrounded by a group of smaller galaxies lacking L* objects. Because of this extreme environment, fossil groups (FGs) are ideal laboratories for studying the mass assembly of brightest group galaxies (BGGs). Aims. We analyzed the near-infrared photometric and structural properties of a sample of 20 BGGs present in FGs to better understand their formation mechanisms. They represent the largest sample studied to date. Methods.Ks-band deep images were used to study the structural properties of our sample galaxies. Their surface-brightness distribution was fitted to a Sérsic profile using the GASP2D algorithm. Then, the standard scaling relations were derived for the first time for these galaxies and compared with those of normal ellipticals and brightest cluster galaxies in non-fossil systems. Results. The BGGs presented in this study represent a subset of the most massive galaxies in the Universe. We find that their ellipticity profiles are continuously increasing with the galactocentric radius. Our fossil BCGs follow closely the fundamental plane described by normal ellipticals. However, they depart from both the log σ0vs. log LKs and log revs. log LKs relations described by intermediate-mass ellipticals. This occurs in the sense that our BGGs have larger effective radii and smaller velocity dispersions than those predicted by these relations. We also find that more elliptical galaxies systematically deviate from the previous relations, while rounder objects do not. No similar correlation was found with the Sérsic index. Conclusions. The derived scaling relations can be interpreted in terms of the formation scenario of the BGGs. Because our BGGs follow the fundamental plane tilt but have larger effective radii than expected for intermediate-mass ellipticals, we suggest that they only went through dissipational mergers in an early stage of their evolution and then assembled the bulk of their mass through subsequent dry mergers, contrary to previous claims that BGGs in FGs were mainly formed by the merging of gas-rich galaxies. © 2012 ESO. |
| publishDate |
2012 |
| dc.date.none.fl_str_mv |
2012 2026 2026 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/420477 |
| url |
http://hdl.handle.net/10261/420477 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
#PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MICINN//CSD2006-00070 info:eu-repo/grantAgreement/MEC//AYA2007-67965-C03-01 info:eu-repo/grantAgreement/MICINN//AYA2010-21887-C04-04 info:eu-repo/grantAgreement/MEC//AYA2007-67965-C03-02 info:eu-repo/grantAgreement/MICINN//AYA2010-21887-C04-01 http://dx.doi.org/10.1051/0004-6361/201117755 Sí |
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info:eu-repo/semantics/openAccess |
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openAccess |
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EDP Sciences |
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EDP Sciences |
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reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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Consejo Superior de Investigaciones Científicas (CSIC) |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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1869414099502235648 |
| spelling |
Fossil group origins. II. Unveiling the formation of the brightest group galaxies through their scaling relationsMéndez-Abreu, J.Aguerri, J.A.L.Barrena, R.Sánchez-Janssen, R.Boschin, W.Castro-Rodriguez, N.Corsini, E. M.Burgo, Carlos delD'Onghia, E.Girardi, M.Iglesias-Páramo, J.Napolitano, N.Vílchez Medina, José ManuelZarattini, S.Galaxies: photometryGalaxies: structureGalaxies: evolutionGalaxies: formationGalaxies: elliptical and lenticularcDGalaxies: fundamental parametersContext. Fossil systems are galaxy associations dominated by a relatively isolated, bright elliptical galaxy, surrounded by a group of smaller galaxies lacking L* objects. Because of this extreme environment, fossil groups (FGs) are ideal laboratories for studying the mass assembly of brightest group galaxies (BGGs). Aims. We analyzed the near-infrared photometric and structural properties of a sample of 20 BGGs present in FGs to better understand their formation mechanisms. They represent the largest sample studied to date. Methods.Ks-band deep images were used to study the structural properties of our sample galaxies. Their surface-brightness distribution was fitted to a Sérsic profile using the GASP2D algorithm. Then, the standard scaling relations were derived for the first time for these galaxies and compared with those of normal ellipticals and brightest cluster galaxies in non-fossil systems. Results. The BGGs presented in this study represent a subset of the most massive galaxies in the Universe. We find that their ellipticity profiles are continuously increasing with the galactocentric radius. Our fossil BCGs follow closely the fundamental plane described by normal ellipticals. However, they depart from both the log σ0vs. log LKs and log revs. log LKs relations described by intermediate-mass ellipticals. This occurs in the sense that our BGGs have larger effective radii and smaller velocity dispersions than those predicted by these relations. We also find that more elliptical galaxies systematically deviate from the previous relations, while rounder objects do not. No similar correlation was found with the Sérsic index. Conclusions. The derived scaling relations can be interpreted in terms of the formation scenario of the BGGs. Because our BGGs follow the fundamental plane tilt but have larger effective radii than expected for intermediate-mass ellipticals, we suggest that they only went through dissipational mergers in an early stage of their evolution and then assembled the bulk of their mass through subsequent dry mergers, contrary to previous claims that BGGs in FGs were mainly formed by the merging of gas-rich galaxies. © 2012 ESO.We acknowledge the anonymous referee for the positive comments which helped us to improve the paper. J.M.A., J.I.P., and J.V.M. are partially funded by the Spanish MICINN under the Consolider-Ingenio 2010 Program grant CSD2006-00070: First Science with the GTC (http:// www.iac.es/consolider-ingenio-gtc). J.M.A. and J.A.L.A. are partially funded by the Spanish MICINN (grants AYA2007-67965-C03-01 and AYA2010- 21887-C04-04). J.I.P. and J.V.M. are partially funded by the Spanish MICINN (grants AYA2007-67965-C03-02 and AYA2010-21887-C04-01). C.d.B. is partly funded by the Fundação para a Ciência e a Tecnologia (FCT)-Portugal through the project PEst-OE/EEI/UI0066/2011. E.M.C. is supported by the University of Padua through grants CPDA089220, 60A02-1283/10, and 60A02-5052/11 and by the Italian Space Agency (ASI) through grant ASI-INAF I/009/10/0. This article is based on observations made with the William Herschel Telescope op- erated on the island of La Palma, in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias. This work is based in part on data obtained as part of the UKIRT Infrared Deep Sky SurveyPeer reviewedEDP SciencesMinisterio de Ciencia e Innovación (España)Ministerio de Educación y Ciencia (España)Fundação para a Ciência e a Tecnologia (Portugal)Agenzia Spaziale ItalianaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202620262012info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/420477reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MICINN//CSD2006-00070info:eu-repo/grantAgreement/MEC//AYA2007-67965-C03-01info:eu-repo/grantAgreement/MICINN//AYA2010-21887-C04-04info:eu-repo/grantAgreement/MEC//AYA2007-67965-C03-02info:eu-repo/grantAgreement/MICINN//AYA2010-21887-C04-01http://dx.doi.org/10.1051/0004-6361/201117755Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4204772026-05-22T06:33:51Z |
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15.81155 |