EDP Sciences
Free access
Volume 415, Number 1, February III 2004
Page(s) 251 - 257
Section Stellar structure and evolution
DOI http://dx.doi.org/10.1051/0004-6361:20034143

A&A 415, 251-257 (2004)
DOI: 10.1051/0004-6361:20034143

Asteroseismology of the $\beta$ Cep star HD 129929

II. Seismic constraints on core overshooting, internal rotation and stellar parameters
M.-A. Dupret1, 2, A. Thoul1, R. Scuflaire1, J. Daszynska-Daszkiewicz3, 4, C. Aerts3, P.-O. Bourge1, C. Waelkens3 and A. Noels1

1  Institut d'Astrophysique et de Géophysique, Université de Liège, allée du Six Août 17, 4000 Liège, Belgium
2  Instituto de Astrofísica de Andalucía-CSIC, Apartado 3004, 18080 Granada, Spain
3  Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200 B, 3001 Leuven, Belgium
4  Astronomical Institute of the Wroclaw University, ul. Kopernika 11, 51-622 Wroclaw, Poland

(Received 1 August 2003 / Accepted 25 September 2003)

We perform a detailed seismic study of the $\beta$ Cep star HD 129929. Our analysis is based on the recent derivation of six pulsation frequencies. These frequencies are unambiguously identified from the seismic modelling and the photometric amplitudes to be the radial fundamental, the $\ell=1$, p1 triplet, two consecutive components of the $\ell=2$, g1 quintuplet. A non-adiabatic analysis allows us to constrain the metallicity of the star to $Z
\in [0.016, 0.022]$ . In addition, the fitting of three independent frequencies, two of which correspond to axisymmetric ( m=0) modes, allows us to constrain the core overshooting parameter to $\alpha_{\rm ov}=0.10\,\pm\,0.05$, as well as the other global parameters of the star. Finally, from the observation of the $\ell=1$ triplet and part of the $\ell=2$ quintuplet, we derive constraints on the internal rotation of this star.

Key words: stars: oscillations -- stars: interiors -- stars: variables: general -- stars: individual: HD 129929

Offprint request: M.-A. Dupret, madupret@iaa.es

SIMBAD Objects

© ESO 2004