GEMINI/GMOS search for massive binaries in the ionizing cluster of 30 DOR

Autores
Bosch, Guillermo Luis; Terlevich, Elena; Terlevich, Roberto
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
If binaries are common among massive stars, it will have important consequences for the derivation of fundamental properties such as the cluster age, initial mass function, and dynamical mass. Making use of the multiplexing facilities of the Gemini Multi-Object Spectrograph, we were able to investigate the presence of binary stars within the ionizing cluster of 30 Doradus. From a seven-epoch observing campaign at Gemini South we detect a binary candidate rate of about 50%, which is consistent with an intrinsic 100% binary rate among massive stars. We find that single-epoch determinations of the velocity dispersion give values around 30 km s−1. After correcting the global velocity dispersion for the binary orbital motions, the “true” cluster velocity dispersion is 8.3 km s−1. This value implies a virial mass of about 4.5 × 105 M or 8% of the mass calculated using the single-epoch value. The binary corrected virial mass estimate is consistent with photometric mass determinations, thus suggesting that NGC 2070 is a firm candidate for a future globular cluster.
Fil: Bosch, Guillermo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Terlevich, Elena. INAOE; México
Fil: Terlevich, Roberto. INAOE; México
Materia
Massive stars
Spectroscopic binaries
Galaxies
Clusters
Magellanic Clouds
Early type stars
kinematics 1. IN
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/42799

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spelling GEMINI/GMOS search for massive binaries in the ionizing cluster of 30 DORBosch, Guillermo LuisTerlevich, ElenaTerlevich, RobertoMassive starsSpectroscopic binariesGalaxiesClustersMagellanic CloudsEarly type starskinematics 1. INhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1If binaries are common among massive stars, it will have important consequences for the derivation of fundamental properties such as the cluster age, initial mass function, and dynamical mass. Making use of the multiplexing facilities of the Gemini Multi-Object Spectrograph, we were able to investigate the presence of binary stars within the ionizing cluster of 30 Doradus. From a seven-epoch observing campaign at Gemini South we detect a binary candidate rate of about 50%, which is consistent with an intrinsic 100% binary rate among massive stars. We find that single-epoch determinations of the velocity dispersion give values around 30 km s−1. After correcting the global velocity dispersion for the binary orbital motions, the “true” cluster velocity dispersion is 8.3 km s−1. This value implies a virial mass of about 4.5 × 105 M or 8% of the mass calculated using the single-epoch value. The binary corrected virial mass estimate is consistent with photometric mass determinations, thus suggesting that NGC 2070 is a firm candidate for a future globular cluster.Fil: Bosch, Guillermo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Terlevich, Elena. INAOE; MéxicoFil: Terlevich, Roberto. INAOE; MéxicoIOP Publishing2009-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/42799Bosch, Guillermo Luis; Terlevich, Elena; Terlevich, Roberto; GEMINI/GMOS search for massive binaries in the ionizing cluster of 30 DOR; IOP Publishing; Astronomical Journal; 137; 2; 12-2009; 3437-34410004-6256CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1088/0004-6256/137/2/3437info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-6256/137/2/3437/metainfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:08:11Zoai:ri.conicet.gov.ar:11336/42799instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:08:12.059CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv GEMINI/GMOS search for massive binaries in the ionizing cluster of 30 DOR
title GEMINI/GMOS search for massive binaries in the ionizing cluster of 30 DOR
spellingShingle GEMINI/GMOS search for massive binaries in the ionizing cluster of 30 DOR
Bosch, Guillermo Luis
Massive stars
Spectroscopic binaries
Galaxies
Clusters
Magellanic Clouds
Early type stars
kinematics 1. IN
title_short GEMINI/GMOS search for massive binaries in the ionizing cluster of 30 DOR
title_full GEMINI/GMOS search for massive binaries in the ionizing cluster of 30 DOR
title_fullStr GEMINI/GMOS search for massive binaries in the ionizing cluster of 30 DOR
title_full_unstemmed GEMINI/GMOS search for massive binaries in the ionizing cluster of 30 DOR
title_sort GEMINI/GMOS search for massive binaries in the ionizing cluster of 30 DOR
dc.creator.none.fl_str_mv Bosch, Guillermo Luis
Terlevich, Elena
Terlevich, Roberto
author Bosch, Guillermo Luis
author_facet Bosch, Guillermo Luis
Terlevich, Elena
Terlevich, Roberto
author_role author
author2 Terlevich, Elena
Terlevich, Roberto
author2_role author
author
dc.subject.none.fl_str_mv Massive stars
Spectroscopic binaries
Galaxies
Clusters
Magellanic Clouds
Early type stars
kinematics 1. IN
topic Massive stars
Spectroscopic binaries
Galaxies
Clusters
Magellanic Clouds
Early type stars
kinematics 1. IN
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv If binaries are common among massive stars, it will have important consequences for the derivation of fundamental properties such as the cluster age, initial mass function, and dynamical mass. Making use of the multiplexing facilities of the Gemini Multi-Object Spectrograph, we were able to investigate the presence of binary stars within the ionizing cluster of 30 Doradus. From a seven-epoch observing campaign at Gemini South we detect a binary candidate rate of about 50%, which is consistent with an intrinsic 100% binary rate among massive stars. We find that single-epoch determinations of the velocity dispersion give values around 30 km s−1. After correcting the global velocity dispersion for the binary orbital motions, the “true” cluster velocity dispersion is 8.3 km s−1. This value implies a virial mass of about 4.5 × 105 M or 8% of the mass calculated using the single-epoch value. The binary corrected virial mass estimate is consistent with photometric mass determinations, thus suggesting that NGC 2070 is a firm candidate for a future globular cluster.
Fil: Bosch, Guillermo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Terlevich, Elena. INAOE; México
Fil: Terlevich, Roberto. INAOE; México
description If binaries are common among massive stars, it will have important consequences for the derivation of fundamental properties such as the cluster age, initial mass function, and dynamical mass. Making use of the multiplexing facilities of the Gemini Multi-Object Spectrograph, we were able to investigate the presence of binary stars within the ionizing cluster of 30 Doradus. From a seven-epoch observing campaign at Gemini South we detect a binary candidate rate of about 50%, which is consistent with an intrinsic 100% binary rate among massive stars. We find that single-epoch determinations of the velocity dispersion give values around 30 km s−1. After correcting the global velocity dispersion for the binary orbital motions, the “true” cluster velocity dispersion is 8.3 km s−1. This value implies a virial mass of about 4.5 × 105 M or 8% of the mass calculated using the single-epoch value. The binary corrected virial mass estimate is consistent with photometric mass determinations, thus suggesting that NGC 2070 is a firm candidate for a future globular cluster.
publishDate 2009
dc.date.none.fl_str_mv 2009-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/42799
Bosch, Guillermo Luis; Terlevich, Elena; Terlevich, Roberto; GEMINI/GMOS search for massive binaries in the ionizing cluster of 30 DOR; IOP Publishing; Astronomical Journal; 137; 2; 12-2009; 3437-3441
0004-6256
CONICET Digital
CONICET
url http://hdl.handle.net/11336/42799
identifier_str_mv Bosch, Guillermo Luis; Terlevich, Elena; Terlevich, Roberto; GEMINI/GMOS search for massive binaries in the ionizing cluster of 30 DOR; IOP Publishing; Astronomical Journal; 137; 2; 12-2009; 3437-3441
0004-6256
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-6256/137/2/3437
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-6256/137/2/3437/meta
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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