Gemini/GMOS detection of stellar velocity variations in the ionising cluster of 30 Dor
- Autores
- Bosch, Guillermo Luis; Terlevich, Elena; Terlevich, Roberto
- Año de publicación
- 2008
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We have analysed spectra obtained with the Gemini Multi Object Spectrograph (GMOS) for more than 50 stars in the ionising cluster of 30Doradus during a seven epochs observing campaign at Gemini South. We derive a binary candidate rate of about 50%, which is however consistent with an intrinsic 100% binary rate among massive stars. After decontaminating the sample from the stars that show binary orbital motions, we were able to calculate the "true" cluster velocity dispersion and found it to be about 8 km s-1. This value implies a virial mass of about 4.5 × 10M⊙ which is consistent with previous photometric mass determinations therefore suggesting that NGC 2070 is a firm candidate for a future globular cluster.
Facultad de Ciencias Astronómicas y Geofísicas - Materia
-
Ciencias Astronómicas
Binaries: spectroscopic
Galaxies: individual (LMC)
Magellanic Clouds
Stars: early-type
Stars: kinematics - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/84542
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Gemini/GMOS detection of stellar velocity variations in the ionising cluster of 30 DorBosch, Guillermo LuisTerlevich, ElenaTerlevich, RobertoCiencias AstronómicasBinaries: spectroscopicGalaxies: individual (LMC)Magellanic CloudsStars: early-typeStars: kinematicsWe have analysed spectra obtained with the Gemini Multi Object Spectrograph (GMOS) for more than 50 stars in the ionising cluster of 30Doradus during a seven epochs observing campaign at Gemini South. We derive a binary candidate rate of about 50%, which is however consistent with an intrinsic 100% binary rate among massive stars. After decontaminating the sample from the stars that show binary orbital motions, we were able to calculate the "true" cluster velocity dispersion and found it to be about 8 km s-1. This value implies a virial mass of about 4.5 × 10M⊙ which is consistent with previous photometric mass determinations therefore suggesting that NGC 2070 is a firm candidate for a future globular cluster.Facultad de Ciencias Astronómicas y Geofísicas2008info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf317-322http://sedici.unlp.edu.ar/handle/10915/84542enginfo:eu-repo/semantics/altIdentifier/issn/1743-9213info:eu-repo/semantics/altIdentifier/doi/10.1017/S1743921308028640info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:16:11Zoai:sedici.unlp.edu.ar:10915/84542Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:11.456SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Gemini/GMOS detection of stellar velocity variations in the ionising cluster of 30 Dor |
title |
Gemini/GMOS detection of stellar velocity variations in the ionising cluster of 30 Dor |
spellingShingle |
Gemini/GMOS detection of stellar velocity variations in the ionising cluster of 30 Dor Bosch, Guillermo Luis Ciencias Astronómicas Binaries: spectroscopic Galaxies: individual (LMC) Magellanic Clouds Stars: early-type Stars: kinematics |
title_short |
Gemini/GMOS detection of stellar velocity variations in the ionising cluster of 30 Dor |
title_full |
Gemini/GMOS detection of stellar velocity variations in the ionising cluster of 30 Dor |
title_fullStr |
Gemini/GMOS detection of stellar velocity variations in the ionising cluster of 30 Dor |
title_full_unstemmed |
Gemini/GMOS detection of stellar velocity variations in the ionising cluster of 30 Dor |
title_sort |
Gemini/GMOS detection of stellar velocity variations in the ionising 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 |
Ciencias Astronómicas Binaries: spectroscopic Galaxies: individual (LMC) Magellanic Clouds Stars: early-type Stars: kinematics |
topic |
Ciencias Astronómicas Binaries: spectroscopic Galaxies: individual (LMC) Magellanic Clouds Stars: early-type Stars: kinematics |
dc.description.none.fl_txt_mv |
We have analysed spectra obtained with the Gemini Multi Object Spectrograph (GMOS) for more than 50 stars in the ionising cluster of 30Doradus during a seven epochs observing campaign at Gemini South. We derive a binary candidate rate of about 50%, which is however consistent with an intrinsic 100% binary rate among massive stars. After decontaminating the sample from the stars that show binary orbital motions, we were able to calculate the "true" cluster velocity dispersion and found it to be about 8 km s-1. This value implies a virial mass of about 4.5 × 10M⊙ which is consistent with previous photometric mass determinations therefore suggesting that NGC 2070 is a firm candidate for a future globular cluster. Facultad de Ciencias Astronómicas y Geofísicas |
description |
We have analysed spectra obtained with the Gemini Multi Object Spectrograph (GMOS) for more than 50 stars in the ionising cluster of 30Doradus during a seven epochs observing campaign at Gemini South. We derive a binary candidate rate of about 50%, which is however consistent with an intrinsic 100% binary rate among massive stars. After decontaminating the sample from the stars that show binary orbital motions, we were able to calculate the "true" cluster velocity dispersion and found it to be about 8 km s-1. This value implies a virial mass of about 4.5 × 10M⊙ which is consistent with previous photometric mass determinations therefore suggesting that NGC 2070 is a firm candidate for a future globular cluster. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo 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://sedici.unlp.edu.ar/handle/10915/84542 |
url |
http://sedici.unlp.edu.ar/handle/10915/84542 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/1743-9213 info:eu-repo/semantics/altIdentifier/doi/10.1017/S1743921308028640 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
dc.format.none.fl_str_mv |
application/pdf 317-322 |
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reponame:SEDICI (UNLP) instname:Universidad Nacional de La Plata instacron:UNLP |
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SEDICI (UNLP) - Universidad Nacional de La Plata |
repository.mail.fl_str_mv |
alira@sedici.unlp.edu.ar |
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