The ionising cluster of 30 Doradus : IV. Stellar kinematics

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...

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Detalles Bibliográficos
Autores principales: Bosch, Guillermo Luis, Selman, F., Melnick, J., Terlevich, R.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2001
Materias:
Ciencias Astronómicas
Binaries: spectroscopic
Galaxies: clusters: general
Galaxies: Magellanic Clouds
Stars: early-type
Stars: kinematics
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84386
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84386
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Binaries: spectroscopic
Galaxies: clusters: general
Galaxies: Magellanic Clouds
Stars: early-type
Stars: kinematics
spellingShingle Ciencias Astronómicas
Binaries: spectroscopic
Galaxies: clusters: general
Galaxies: Magellanic Clouds
Stars: early-type
Stars: kinematics
Bosch, Guillermo Luis
Selman, F.
Melnick, J.
Terlevich, R.
The ionising cluster of 30 Doradus : IV. Stellar kinematics
topic_facet Ciencias Astronómicas
Binaries: spectroscopic
Galaxies: clusters: general
Galaxies: Magellanic Clouds
Stars: early-type
Stars: kinematics
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.
format Articulo
Articulo
author Bosch, Guillermo Luis
Selman, F.
Melnick, J.
Terlevich, R.
author_facet Bosch, Guillermo Luis
Selman, F.
Melnick, J.
Terlevich, R.
author_sort Bosch, Guillermo Luis
title The ionising cluster of 30 Doradus : IV. Stellar 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 ionising cluster of 30 doradus : iv. stellar kinematics
publishDate 2001
url http://sedici.unlp.edu.ar/handle/10915/84386
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