Spectroscopic hint of a cold stream in the direction of the globular cluster NGC 1851

We present the results of a spectroscopic survey performed in the outskirts of the globular cluster NGC 1851 with VIsible MultiObject Spectrograph (VIMOS)/Very Large Telescope (VLT). The radial velocities of 107 stars in a region between 12 and 33arcmin around the cluster have been derived. We clear...

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Detalles Bibliográficos
Autores: Sollima, A., Gratton, R. G., Carballo-Bello, Julio A., Martínez-Delgado, David, Carretta, E., Bragaglia, A., Lucatello, Sara, Peñarrubia, Jorge
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2012
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/424816
Acceso en línea:http://hdl.handle.net/10261/424816
Access Level:acceso abierto
Palabra clave:Methods: data analysis
Methods: observational
Techniques: radial velocities
Globular clusters: individual: NGC 1851
Galaxy: halo
Galaxy: stellar content
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spelling Spectroscopic hint of a cold stream in the direction of the globular cluster NGC 1851Sollima, A.Gratton, R. G.Carballo-Bello, Julio A.Martínez-Delgado, DavidCarretta, E.Bragaglia, A.Lucatello, SaraPeñarrubia, JorgeMethods: data analysisMethods: observationalTechniques: radial velocitiesGlobular clusters: individual: NGC 1851Galaxy: haloGalaxy: stellar contentWe present the results of a spectroscopic survey performed in the outskirts of the globular cluster NGC 1851 with VIsible MultiObject Spectrograph (VIMOS)/Very Large Telescope (VLT). The radial velocities of 107 stars in a region between 12 and 33arcmin around the cluster have been derived. We clearly identify the cluster stellar population over the entire field of view, indicating the presence of a significant fraction of stars outside the tidal radius predicted by King models. We also find tentative evidence of a cold (σv ≤ 20kms-1) peak in the distribution of velocities at vr ∼ 180kms-1 constituted mainly by main-sequence stars whose location in the colour-magnitude diagram is compatible with a stream at a similar distance to this cluster. If confirmed, this evidence would strongly support the extragalactic origin of this feature. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.AS acknowledges the support of INAF through the 2010 postdoc- toral fellowship grant. RGG, EC, AB and SL acknowledge the PRIN INAF ‘Formation and Early Evolution of Massive Star Clusters’. JP acknowledges support from the Ram´on y Cajal Programme as well as by the Spanish grant AYA2010-17631 awarded by the Ministerio of Econom´ıa y Competitividad. We thank Michael West, the referee of our paper, for his helpful comments and suggestions.Peer reviewedOxford University PressIstituto Nazionale di AstrofisicaMinisterio de Ciencia e Innovación (España)Ministerio de Economía y Competitividad (España)Consejo 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/10261/424816reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MICINN//AYA2010-17631http://dx.doi.org/10.1111/j.1365-2966.2012.21803.xSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4248162026-05-22T06:33:51Z
dc.title.none.fl_str_mv Spectroscopic hint of a cold stream in the direction of the globular cluster NGC 1851
title Spectroscopic hint of a cold stream in the direction of the globular cluster NGC 1851
spellingShingle Spectroscopic hint of a cold stream in the direction of the globular cluster NGC 1851
Sollima, A.
Methods: data analysis
Methods: observational
Techniques: radial velocities
Globular clusters: individual: NGC 1851
Galaxy: halo
Galaxy: stellar content
title_short Spectroscopic hint of a cold stream in the direction of the globular cluster NGC 1851
title_full Spectroscopic hint of a cold stream in the direction of the globular cluster NGC 1851
title_fullStr Spectroscopic hint of a cold stream in the direction of the globular cluster NGC 1851
title_full_unstemmed Spectroscopic hint of a cold stream in the direction of the globular cluster NGC 1851
title_sort Spectroscopic hint of a cold stream in the direction of the globular cluster NGC 1851
dc.creator.none.fl_str_mv Sollima, A.
Gratton, R. G.
Carballo-Bello, Julio A.
Martínez-Delgado, David
Carretta, E.
Bragaglia, A.
Lucatello, Sara
Peñarrubia, Jorge
author Sollima, A.
author_facet Sollima, A.
Gratton, R. G.
Carballo-Bello, Julio A.
Martínez-Delgado, David
Carretta, E.
Bragaglia, A.
Lucatello, Sara
Peñarrubia, Jorge
author_role author
author2 Gratton, R. G.
Carballo-Bello, Julio A.
Martínez-Delgado, David
Carretta, E.
Bragaglia, A.
Lucatello, Sara
Peñarrubia, Jorge
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Istituto Nazionale di Astrofisica
Ministerio de Ciencia e Innovación (España)
Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Methods: data analysis
Methods: observational
Techniques: radial velocities
Globular clusters: individual: NGC 1851
Galaxy: halo
Galaxy: stellar content
topic Methods: data analysis
Methods: observational
Techniques: radial velocities
Globular clusters: individual: NGC 1851
Galaxy: halo
Galaxy: stellar content
description We present the results of a spectroscopic survey performed in the outskirts of the globular cluster NGC 1851 with VIsible MultiObject Spectrograph (VIMOS)/Very Large Telescope (VLT). The radial velocities of 107 stars in a region between 12 and 33arcmin around the cluster have been derived. We clearly identify the cluster stellar population over the entire field of view, indicating the presence of a significant fraction of stars outside the tidal radius predicted by King models. We also find tentative evidence of a cold (σv ≤ 20kms-1) peak in the distribution of velocities at vr ∼ 180kms-1 constituted mainly by main-sequence stars whose location in the colour-magnitude diagram is compatible with a stream at a similar distance to this cluster. If confirmed, this evidence would strongly support the extragalactic origin of this feature. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.
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
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/424816
url http://hdl.handle.net/10261/424816
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MICINN//AYA2010-17631
http://dx.doi.org/10.1111/j.1365-2966.2012.21803.x
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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