On the formation of cD galaxies and their parent clusters

In order to study the mechanism of formation of cDgalaxies we search for possible dependencies between the K-band luminosity of cDs and the parameters of their host clusters which we select to have a dominant cD galaxy, corresponding to a cluster morphology of Bautz-Morgan (BM) type I. As a comparis...

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Detalles Bibliográficos
Autor: Tovmassian Hrant
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2012
País:México
Institución:Instituto Nacional de Astrofísica, Óptica y Electrónica
Repositorio:Repositorio Institucional del INAOE
Idioma:inglés
OAI Identifier:oai:inaoe.repositorioinstitucional.mx:1009/2044
Acceso en línea:http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2044
Access Level:acceso abierto
Palabra clave:info:eu-repo/classification/Inspec/Galaxies: clusters
info:eu-repo/classification/Inspec/Clusters: general
info:eu-repo/classification/Inspec/Galaxies: formation
info:eu-repo/classification/Inspec/Galaxies: cD galaxies
info:eu-repo/classification/cti/1
info:eu-repo/classification/cti/21
id MX_dfba1be33b4e2b7e9637bf400a2b099e
oai_identifier_str oai:inaoe.repositorioinstitucional.mx:1009/2044
network_acronym_str MX
network_name_str México
repository_id_str
spelling On the formation of cD galaxies and their parent clustersTovmassian Hrantinfo:eu-repo/classification/Inspec/Galaxies: clustersinfo:eu-repo/classification/Inspec/Clusters: generalinfo:eu-repo/classification/Inspec/Galaxies: formationinfo:eu-repo/classification/Inspec/Galaxies: cD galaxiesinfo:eu-repo/classification/cti/1info:eu-repo/classification/cti/21info:eu-repo/classification/cti/21In order to study the mechanism of formation of cDgalaxies we search for possible dependencies between the K-band luminosity of cDs and the parameters of their host clusters which we select to have a dominant cD galaxy, corresponding to a cluster morphology of Bautz-Morgan (BM) type I. As a comparison sample we use cD galaxies in clusters where they are not dominant, which we define here as non-BMI (NBMI) type clusters. We find that for 71 BMI clusters the absolute K-band luminosity of cDsdepends on the cluster richness, but less strongly on the cluster velocity dispersion. Meanwhile, for 35 NBMI clusters the correlation between cD luminosity and cluster richness is weaker, and is absent between cD In order to study the mechanism of formation of cDgalaxies we search for possible dependencies between the K-band luminosity of cDs and the parameters of their host clusters which we select to have a dominant cD galaxy, corresponding to a cluster morphology of Bautz-Morgan (BM) type I. As a comparison sample we use cD galaxies in clusters where they are not dominant, which we define here as non-BMI (NBMI) type clusters. We find that for 71 BMI clusters the absolute K-band luminosity of cDsdepends on the cluster richness, but less strongly on the cluster velocity dispersion. Meanwhile, for 35 NBMI clusters the correlation between cD luminosity and cluster richness is weaker, and is absent between cD luminosity and velocity dispersion. In addition, we find that the luminosity of the cD galaxy hosted in BMI clusters tends to increase with the cD’s peculiar velocity with respect to the cluster mean velocity. In contrast, for NBMI clusters the cD luminosity decreases with increasing peculiar velocity. Also, the X-ray luminosity of BMI clusters depends on the cluster velocity dispersion, while in NBMI clusters such a correlation is absent. These findings favourthe cannibalism scenario for the formation of cD galaxies. WesuggestthatcDs inclusters of BMI type were formed and evolved preferentially in one and the same cluster. In contrast, cDs in NBMI type clusters were either originally formed in clusters that later merged with groups or clusters to form the current cluster, or are now in the process of merging.Monthly notices of the royal astronomical society2012-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2044reponame:Repositorio Institucional del INAOEinstname:Instituto Nacional de Astrofísica, Óptica y Electrónicainstacron:INAOEengcitation:Tovmassian, Hrant M. and Andernach, Heinz, (2012), On the Formation of cD Galaxies and their Parent Cluster, Monthly notices of the royal astronomical society, Vol. 427(3):1-12info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0oai:inaoe.repositorioinstitucional.mx:1009/20442024-08-28T03:23:03Z
dc.title.none.fl_str_mv On the formation of cD galaxies and their parent clusters
title On the formation of cD galaxies and their parent clusters
spellingShingle On the formation of cD galaxies and their parent clusters
Tovmassian Hrant
info:eu-repo/classification/Inspec/Galaxies: clusters
info:eu-repo/classification/Inspec/Clusters: general
info:eu-repo/classification/Inspec/Galaxies: formation
info:eu-repo/classification/Inspec/Galaxies: cD galaxies
info:eu-repo/classification/cti/1
info:eu-repo/classification/cti/21
info:eu-repo/classification/cti/21
title_short On the formation of cD galaxies and their parent clusters
title_full On the formation of cD galaxies and their parent clusters
title_fullStr On the formation of cD galaxies and their parent clusters
title_full_unstemmed On the formation of cD galaxies and their parent clusters
title_sort On the formation of cD galaxies and their parent clusters
dc.creator.none.fl_str_mv Tovmassian Hrant
author Tovmassian Hrant
author_facet Tovmassian Hrant
author_role author
dc.subject.none.fl_str_mv info:eu-repo/classification/Inspec/Galaxies: clusters
info:eu-repo/classification/Inspec/Clusters: general
info:eu-repo/classification/Inspec/Galaxies: formation
info:eu-repo/classification/Inspec/Galaxies: cD galaxies
info:eu-repo/classification/cti/1
info:eu-repo/classification/cti/21
info:eu-repo/classification/cti/21
topic info:eu-repo/classification/Inspec/Galaxies: clusters
info:eu-repo/classification/Inspec/Clusters: general
info:eu-repo/classification/Inspec/Galaxies: formation
info:eu-repo/classification/Inspec/Galaxies: cD galaxies
info:eu-repo/classification/cti/1
info:eu-repo/classification/cti/21
info:eu-repo/classification/cti/21
description In order to study the mechanism of formation of cDgalaxies we search for possible dependencies between the K-band luminosity of cDs and the parameters of their host clusters which we select to have a dominant cD galaxy, corresponding to a cluster morphology of Bautz-Morgan (BM) type I. As a comparison sample we use cD galaxies in clusters where they are not dominant, which we define here as non-BMI (NBMI) type clusters. We find that for 71 BMI clusters the absolute K-band luminosity of cDsdepends on the cluster richness, but less strongly on the cluster velocity dispersion. Meanwhile, for 35 NBMI clusters the correlation between cD luminosity and cluster richness is weaker, and is absent between cD In order to study the mechanism of formation of cDgalaxies we search for possible dependencies between the K-band luminosity of cDs and the parameters of their host clusters which we select to have a dominant cD galaxy, corresponding to a cluster morphology of Bautz-Morgan (BM) type I. As a comparison sample we use cD galaxies in clusters where they are not dominant, which we define here as non-BMI (NBMI) type clusters. We find that for 71 BMI clusters the absolute K-band luminosity of cDsdepends on the cluster richness, but less strongly on the cluster velocity dispersion. Meanwhile, for 35 NBMI clusters the correlation between cD luminosity and cluster richness is weaker, and is absent between cD luminosity and velocity dispersion. In addition, we find that the luminosity of the cD galaxy hosted in BMI clusters tends to increase with the cD’s peculiar velocity with respect to the cluster mean velocity. In contrast, for NBMI clusters the cD luminosity decreases with increasing peculiar velocity. Also, the X-ray luminosity of BMI clusters depends on the cluster velocity dispersion, while in NBMI clusters such a correlation is absent. These findings favourthe cannibalism scenario for the formation of cD galaxies. WesuggestthatcDs inclusters of BMI type were formed and evolved preferentially in one and the same cluster. In contrast, cDs in NBMI type clusters were either originally formed in clusters that later merged with groups or clusters to form the current cluster, or are now in the process of merging.
publishDate 2012
dc.date.none.fl_str_mv 2012-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2044
url http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2044
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv citation:Tovmassian, Hrant M. and Andernach, Heinz, (2012), On the Formation of cD Galaxies and their Parent Cluster, Monthly notices of the royal astronomical society, Vol. 427(3):1-12
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Monthly notices of the royal astronomical society
publisher.none.fl_str_mv Monthly notices of the royal astronomical society
dc.source.none.fl_str_mv reponame:Repositorio Institucional del INAOE
instname:Instituto Nacional de Astrofísica, Óptica y Electrónica
instacron:INAOE
instname_str Instituto Nacional de Astrofísica, Óptica y Electrónica
instacron_str INAOE
institution INAOE
reponame_str Repositorio Institucional del INAOE
collection Repositorio Institucional del INAOE
repository.name.fl_str_mv
repository.mail.fl_str_mv
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