Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Lastennet, E."'
Publikováno v:
Astron.Astrophys.409:611-618,2003
Serious discrepancies have recently been observed between predictions of stellar evolution models in the 0.7-1.1 M_sun mass range and accurately measured properties of binary stars with components in this mass range. We study one of these objects, th
Externí odkaz:
http://arxiv.org/abs/astro-ph/0307360
Autor:
Lastennet, E., Valls-Gabaud, D.
Publikováno v:
Astron.Astrophys. 396 (2002) 551-580
Detached, double-lined spectroscopic binaries which are also eclipsing provide the most accurate determinations of stellar mass, radius, temperature and distance-independent luminosity for each of their individual components, and hence constitute a s
Externí odkaz:
http://arxiv.org/abs/astro-ph/0211501
Johnson BVRI photometric data for individual components of binary systems have been provided by ten Brummelaar et al. (2000). This is essential because such binaries could play a critical role in calibrating the single-star stellar evolution theory.
Externí odkaz:
http://arxiv.org/abs/astro-ph/0203341
Publikováno v:
Astrophys.Space Sci. 280 (2002) 83-87
The BaseL Stellar Library (BaSeL) is a library of synthetic spectra which has already been used in various astrophysical applications (stellar clusters studies, characterization and choice of the COROT potential targets, eclipsing binaries,...). This
Externí odkaz:
http://arxiv.org/abs/astro-ph/0112461
Double-lined spectroscopic binaries which are also eclipsing provide the most accurate stellar data, and are consequently of first importance to improve stellar evolution modelling. While the mass and radius of each component of detached eclipsing bi
Externí odkaz:
http://arxiv.org/abs/astro-ph/0110506
Individual components of well-detached binary systems are assumed to be two single-like stars with a common origin, i.e. they share the same chemical composition and same age. Therefore, one expects to fit the observed parameters of both components w
Externí odkaz:
http://arxiv.org/abs/astro-ph/0110507
We discuss the possibilities of the BaSeL models in its lowest temperature boundary (Teff ~ 2500 K for cool giants) to provide the Teff of AGB stars. We present the first step of our work, by comparing our predictions for the AGB star R Fornacis with
Externí odkaz:
http://arxiv.org/abs/astro-ph/0110505
COROT and GAIA are two future major space missions directly connected to most of the stellar astrophysic questions, from stellar physics to evolution of galaxies. We describe a project for the preparation of these two missions by using the possibilit
Externí odkaz:
http://arxiv.org/abs/astro-ph/0110504
Autor:
Lastennet, E., Lignieres, F., Buser, R., Lejeune, Th., Luftinger, Th., Cuisinier, F., Veer-Menneret, C. van 't
We present a sample of 9 nearby F-type stars with detailed spectroscopic analyses to investigate the Basel Stellar Library (BaSeL) in two photometric systems simultaneously, UBV Johnson and uvby Stromgren. The sample corresponds to potential targets
Externí odkaz:
http://arxiv.org/abs/astro-ph/0107140
Autor:
Auriere, M., Baillon, P., Bouquet, A., Carr, B. J., Creze, M., Evans, N. W., Giraud-Heraud, Y., Gould, A., Hewett, P., Kaplan, J., Kerins, E., Lastennet, E., Du, Y. Le, Melchior, A. -L., Paulin-Henriksson, S., Smartt, S. J., Valls-Gabaud, D.
We report the discovery of a short-duration microlensing candidate in the northern field of the POINT-AGAPE pixel lensing survey towards M31. The full-width half-maximum timescale is very short, just 1.8 days. Almost certainly, the source star has be
Externí odkaz:
http://arxiv.org/abs/astro-ph/0102080