Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009coast.158..283o&link_type=abstract
"Communications in Asteroseismology, Vol.158, p. 283 Proceedings of "38th Liege International Astrophysical Colloquium: Evoluti
Astronomy and Astrophysics
Astrophysics
5
Scientific paper
At rotational velocities such as that of upper Main Sequence stars - between 50 to 200 km/s - the effects of rotation on oscillation frequencies must be included. Considering the accuracy reached by available ground-based and space observations, the aim of this study is to determine the limits - in terms of rotational velocity - of a perturbative approach to model the effects of rotation on oscillation frequencies. We thus compare the oscillation frequencies computed by 1D second order perturbative methods to the ones obtained in Reese et al. (2006) - direct integration of a 2D eigenvalue system. To do so, we use polytropic models (N=3) in uniform rotation, and we discuss the results for a β Cephei star (8.2 M_{&sun;}, 5.04 R_{&sun;}).
Dupret Marc-Antoine
Goupil Marie Jo
Ouazzani R.-M.
Reese Daniel
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