Issue |
A&A
Volume 515, June 2010
|
|
---|---|---|
Article Number | A74 | |
Number of page(s) | 26 | |
Section | Astronomical instrumentation | |
DOI | https://doi.org/10.1051/0004-6361/200911956 | |
Published online | 10 June 2010 |
Spectroscopic determination of the fundamental parameters of 66 B-type stars in the field-of-view of the CoRoT satellite
1
Instituut voor Sterrenkunde, K.U. Leuven, Celestijnenlaan 200D, 3001 Leuven,
Belgium e-mail: Karolien.Lefever@aeronomie.be
2
BIRA-IASB, Ringlaan 3, 1180 Brussel, Belgium
3
Universitätssternwarte München, Scheinerstr. 1,
81679 München, Germany
4
Institut d'Astrophysique et de Géophysique, Université de Liège, Allée
du 6 Août 17, Bât B5c, 4000 Liège, Belgium
5
Departement Astrofysica, IMAPP, Radboud Universiteit
Nijmegen, PO Box 9010, 6500 GL Nijmegen, The Netherlands
Received:
26
February
2009
Accepted:
11
October
2009
Aims. We determine the fundamental parameters of a sample of B stars with apparent visual magnitudes brighter than 8 in the field-of-view of the CoRoT space mission, from high-resolution spectroscopy.
Methods. We developed an automatic procedure for the spectroscopic analysis of B-type stars with winds, based on an extensive grid of FASTWIND model atmospheres. We use the equivalent widths and/or the line profile shapes of continuum normalized hydrogen, helium, and silicon line profiles to determine the fundamental properties of these stars in an automated way.
Results. After thorough tests, on both synthetic datasets and very high-quality, high-resolution spectra of B stars for which we already had accurate values of physical properties from alternative analyses, we applied our method to 66 B-type stars contained in the ground-based archive of the CoRoT space mission. We discuss the statistical properties of the sample and compare them with those predicted by evolutionary models of B stars.
Conclusions. Our spectroscopic results provide a valuable starting point for any future seismic modelling of the stars, should they be observed by CoRoT.
Key words: stars: atmospheres / stars: early-type / stars: fundamental parameters / methods: data analysis / techniques: spectroscopic / line: profiles
© ESO, 2010
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.