A massive cluster of red supergiants at the base of the Scutum-Crux arm

21 pags., 22 figs., 2 tabs.

Detalles Bibliográficos
Autores: Davies, B., Figer, Don F., Kudritzki, Rolf-Peter, MacKenty, J., Najarro, Francisco, Herrero, A.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2007
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/191126
Acceso en línea:http://hdl.handle.net/10261/191126
Access Level:acceso abierto
Palabra clave:Stars: late-type
Stars: evolution
Supergiants
Open clusters and associations: general
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spelling A massive cluster of red supergiants at the base of the Scutum-Crux armDavies, B.Figer, Don F.Kudritzki, Rolf-PeterMacKenty, J.Najarro, FranciscoHerrero, A.Stars: late-typeStars: evolutionSupergiantsOpen clusters and associations: general21 pags., 22 figs., 2 tabs.We report on the unprecedented red supergiant (RSG) population of a massive young cluster, located at the base of the Scutum-Crux Galactic arm. We identify candidate cluster RSGs based on 2MASS photometry and medium-resolution spectroscopy. With follow-up high-resolution spectroscopy, we use CO band-head equivalent width and high-precision radial velocity measurements to identify a core grouping of 26 physically associated RSGs - the largest such cluster known to date. Using the stars' velocity dispersion and their inferred luminosities in conjunction with evolutionary models, we argue that the cluster has an initial mass of ∼40,000 M⊙ and is therefore among the most massive in the galaxy. Further, the cluster is only a few hundred parsecs away from the cluster of 14 RSGs recently reported by Figer at al.. These two RSG clusters represent 20% of all known RSGs in the Galaxy, and now offer the unique opportunity to study the presupernova evolution of massive stars, and the blue- to red-supergiant ratio at uniform metallicity. We use GLIMPSE, MIPSGAL, and MAGPIS survey data to identify several objects in the field of the larger cluster which seem to be indicative of recent regionwide starburst activity at the point where the ScutumCrux arm intercepts the Galactic bulge. Future abundance studies of these clusters will therefore permit the study of the chemical evolution and metallicity gradient of the Galaxy in the region where the disk meets the bulge. © 2007. The American Astronomical Society. All rights reserved.The material in this work is supported by NASA under award NNG 05-GC37G, through the Long-Term Space Astrophysics program. IRMOS is supported by NASA James Webb Space Telescope, NASA Goddard Space Flight Center, STScI DDRF, and KPNO. This research has made use of the SIMBAD database, Aladin and IDL software packages, and the GSFC IDL library. This research was performed in the Rochester Imaging Detector Laboratory with support from a NYSTAR Faculty Development Program grant. Some of the data presented herein were obtained at theW.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and theNational Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of theW. M. Keck Foundation.Peer ReviewedUniversity of Chicago PressNASAKeck Institute for Space StudiesCalifornia State UniversityConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2019201920072019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/191126reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1086/522224Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1911262026-05-22T06:33:51Z
dc.title.none.fl_str_mv A massive cluster of red supergiants at the base of the Scutum-Crux arm
title A massive cluster of red supergiants at the base of the Scutum-Crux arm
spellingShingle A massive cluster of red supergiants at the base of the Scutum-Crux arm
Davies, B.
Stars: late-type
Stars: evolution
Supergiants
Open clusters and associations: general
title_short A massive cluster of red supergiants at the base of the Scutum-Crux arm
title_full A massive cluster of red supergiants at the base of the Scutum-Crux arm
title_fullStr A massive cluster of red supergiants at the base of the Scutum-Crux arm
title_full_unstemmed A massive cluster of red supergiants at the base of the Scutum-Crux arm
title_sort A massive cluster of red supergiants at the base of the Scutum-Crux arm
dc.creator.none.fl_str_mv Davies, B.
Figer, Don F.
Kudritzki, Rolf-Peter
MacKenty, J.
Najarro, Francisco
Herrero, A.
author Davies, B.
author_facet Davies, B.
Figer, Don F.
Kudritzki, Rolf-Peter
MacKenty, J.
Najarro, Francisco
Herrero, A.
author_role author
author2 Figer, Don F.
Kudritzki, Rolf-Peter
MacKenty, J.
Najarro, Francisco
Herrero, A.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv NASA
Keck Institute for Space Studies
California State University
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Stars: late-type
Stars: evolution
Supergiants
Open clusters and associations: general
topic Stars: late-type
Stars: evolution
Supergiants
Open clusters and associations: general
description 21 pags., 22 figs., 2 tabs.
publishDate 2007
dc.date.none.fl_str_mv 2007
2019
2019
2019
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/10261/191126
url http://hdl.handle.net/10261/191126
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1086/522224
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv University of Chicago Press
publisher.none.fl_str_mv University of Chicago 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 15.81155

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