The ionising cluster of 30 Doradus : IV. Stellar kinematics

Autores
Bosch, Guillermo Luis; Selman, F.; Melnick, J.; Terlevich, R.
Año de publicación
2001
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
On the basis of multislit spectroscopy of 180 stars in the ionising cluster of 30 Doradus we present reliable radial velocities for 55 stars. We calculate a radial velocity dispersion of ∼35 km s-1 for the cluster and we analyse the possible influence of spectroscopic binaries in this rather large velocity dispersion. We use numerical simulations to show that the observations are consistent with the hypothesis that all the stars in the cluster are binaries, and the total mass of the cluster is ∼5 × 105 M⊙. A simple test shows only marginal evidence for dynamical mass segregation which if present is most likely not due to dynamical relaxation.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
Binaries: spectroscopic
Galaxies: clusters: general
Galaxies: 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
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/84386
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/84386
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling The ionising cluster of 30 Doradus : IV. Stellar kinematicsBosch, Guillermo LuisSelman, F.Melnick, J.Terlevich, R.Ciencias AstronómicasBinaries: spectroscopicGalaxies: clusters: generalGalaxies: Magellanic CloudsStars: early-typeStars: kinematicsOn the basis of multislit spectroscopy of 180 stars in the ionising cluster of 30 Doradus we present reliable radial velocities for 55 stars. We calculate a radial velocity dispersion of ∼35 km s<SUP>-1</SUP> for the cluster and we analyse the possible influence of spectroscopic binaries in this rather large velocity dispersion. We use numerical simulations to show that the observations are consistent with the hypothesis that all the stars in the cluster are binaries, and the total mass of the cluster is ∼5 × 10<SUP>5</SUP> M⊙. A simple test shows only marginal evidence for dynamical mass segregation which if present is most likely not due to dynamical relaxation.Facultad de Ciencias Astronómicas y Geofísicas2001info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf137-141http://sedici.unlp.edu.ar/handle/10915/84386enginfo:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20011427info: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:UNLP2025-10-22T16:57:07Zoai:sedici.unlp.edu.ar:10915/84386Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:57:07.981SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv The ionising cluster of 30 Doradus : IV. Stellar kinematics
title The ionising cluster of 30 Doradus : IV. Stellar kinematics
spellingShingle The ionising cluster of 30 Doradus : IV. Stellar kinematics
Bosch, Guillermo Luis
Ciencias Astronómicas
Binaries: spectroscopic
Galaxies: clusters: general
Galaxies: Magellanic Clouds
Stars: early-type
Stars: kinematics
title_short The ionising cluster of 30 Doradus : IV. Stellar kinematics
title_full The ionising cluster of 30 Doradus : IV. Stellar kinematics
title_fullStr The ionising cluster of 30 Doradus : IV. Stellar kinematics
title_full_unstemmed The ionising cluster of 30 Doradus : IV. Stellar kinematics
title_sort The ionising cluster of 30 Doradus : IV. Stellar kinematics
dc.creator.none.fl_str_mv Bosch, Guillermo Luis
Selman, F.
Melnick, J.
Terlevich, R.
author Bosch, Guillermo Luis
author_facet Bosch, Guillermo Luis
Selman, F.
Melnick, J.
Terlevich, R.
author_role author
author2 Selman, F.
Melnick, J.
Terlevich, R.
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Binaries: spectroscopic
Galaxies: clusters: general
Galaxies: Magellanic Clouds
Stars: early-type
Stars: kinematics
topic Ciencias Astronómicas
Binaries: spectroscopic
Galaxies: clusters: general
Galaxies: Magellanic Clouds
Stars: early-type
Stars: kinematics
dc.description.none.fl_txt_mv On the basis of multislit spectroscopy of 180 stars in the ionising cluster of 30 Doradus we present reliable radial velocities for 55 stars. We calculate a radial velocity dispersion of ∼35 km s<SUP>-1</SUP> for the cluster and we analyse the possible influence of spectroscopic binaries in this rather large velocity dispersion. We use numerical simulations to show that the observations are consistent with the hypothesis that all the stars in the cluster are binaries, and the total mass of the cluster is ∼5 × 10<SUP>5</SUP> M⊙. A simple test shows only marginal evidence for dynamical mass segregation which if present is most likely not due to dynamical relaxation.
Facultad de Ciencias Astronómicas y Geofísicas
description On the basis of multislit spectroscopy of 180 stars in the ionising cluster of 30 Doradus we present reliable radial velocities for 55 stars. We calculate a radial velocity dispersion of ∼35 km s<SUP>-1</SUP> for the cluster and we analyse the possible influence of spectroscopic binaries in this rather large velocity dispersion. We use numerical simulations to show that the observations are consistent with the hypothesis that all the stars in the cluster are binaries, and the total mass of the cluster is ∼5 × 10<SUP>5</SUP> M⊙. A simple test shows only marginal evidence for dynamical mass segregation which if present is most likely not due to dynamical relaxation.
publishDate 2001
dc.date.none.fl_str_mv 2001
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/10915/84386
url http://sedici.unlp.edu.ar/handle/10915/84386
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0004-6361
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20011427
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
137-141
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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