Massive stars at low metallicity - Evolution and surface abundances of O dwarfs in the SMC
@article{Bouret2013MassiveSA,
title={Massive stars at low metallicity - Evolution and surface abundances of O dwarfs in the SMC},
author={J-C. Bouret and Thierry M. Lanz and Fabrice Martins and Wagner L. F. Marcolino and D. John Hillier and {\'E}ric Depagne and I. Hubeny},
journal={Astronomy and Astrophysics},
year={2013},
volume={555}
}We study the evolution, rotation, and surface abundances of O-type dwarfs in the Small Magellanic Cloud. We analyzed the UV and optical spectra of twenty-three objects and derived photospheric and wind properties. The observed binary fraction of the sample is ~ 26%, which is compatible with more systematic studies, if one considers that the actual binary fraction is potentially larger owing to low-luminosity companions and that the sample excluded obvious spectroscopic binaries. The location of… Expand
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References
SHOWING 1-10 OF 116 REFERENCES
Properties of Galactic early-type O-supergiants - A combined FUV-UV and optical analysis
- Physics
- 2012
We aim to constrain the properties and evolutionary status of early and mid-spectral type supergiants (from O4 to O7.5). These posses the highest mass-loss rates among the O stars, and exhibit… Expand
A FUSE SURVEY OF THE ROTATION RATES OF VERY MASSIVE STARS IN THE SMALL AND LARGE MAGELLANIC CLOUDS
- Physics
- 2009
We present projected rotational velocity values for 97 Galactic, 55 SMC, and 106 LMC O-B type stars from archival FUSE observations. The evolved and unevolved samples from each environment are… Expand
Observational effects of magnetism in O stars: surface nitrogen abundances ,
- Physics
- 2012
Aims. We investigate the surface nitrogen content of the six magnetic O stars known to date as well as of the early B-type star τ Sco. We compare these abundances to predictions of evolutionary… Expand
A quantitative study of O stars in NGC 2244 and the Monoceros OB2 association
- Physics
- 2011
Aims. Our goal is to determine the stellar and wind properties of seven O stars in the cluster NGC 2244 and three O stars in the OB association Mon OB2. These properties give us insight into the mass… Expand
The Physical Properties and Effective Temperature Scale of O-Type Stars as a Function of Metallicity. II. Analysis of 20 More Magellanic Cloud Stars and Results from the Complete Sample
- Physics
- 2005
In order to determine the physical properties of the hottest and most luminous stars and understand how these properties change as a function of metallicity, we have analyzed HST/UV and high-S/N… Expand
The Effective Temperatures of Hot Stars. II. The Early-O Types*
- Physics
- 2004
We derived the stellar parameters of a sample of Galactic early-O type stars by analyzing their UV and far-UV spectra from the Far Ultraviolet Spectroscopic Explorer (905-1187 A), the International… Expand
High-mass binaries in the very young open cluster NGC 6231. Implication for cluster and star formation
- Physics
- 2001
New radial-velocity observations of 37 O- and B stars in the very young open cluster NGC 6231 confirm the high frequency of short-period spectroscopic binaries on the upper main sequence. Among the… Expand
Lower mass loss rates in O-type stars: Spectral signatures of dense clumps in the wind of two Galactic O4 stars
- Physics
- 2004
We have analyzed the far-ultraviolet spectrum of two Galactic O4 stars, the O4If+ supergiant HD 190429A and the O4V((f)) dwarf HD 96715, using archival FUSE and IUE data. We have conducted a… Expand
O stars with weak winds: the Galactic case
- Physics
- 2005
We study the stellar and wind properties of a sample of Galactic O dwarfs to track the conditions under which weak winds (i.e mass loss rates lower than � 10 −8 M⊙ yr −1 ) appear. The sample is… Expand
Quantitative Spectroscopy of O Stars at Low Metallicity: O Dwarfs in NGC 346*
- Physics
- 2003
We present the results of a detailed analysis of the properties of dwarf O-type stars in a metal-poor environment. High-resolution, high-quality ultraviolet and optical spectra of six O-type stars in… Expand