Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ap%26ss.328..285o&link_type=abstract
Astrophysics and Space Science, Volume 328, Issue 1-2, pp. 285-289
Astronomy and Astrophysics
Astrophysics
Stellar Rotation, Perturbative Methods, Splitting, Differential Rotation, Stellar Oscillation, Beta Cephei
Scientific paper
We investigate whether the rotational splittings of β Cephei stars can give some clue about the existence of a differential rotation in latitude, and if they are contaminated by the cubic order effects of rotation on oscillation frequencies. We also study some properties of splitting asymmetries and axisymmetric mode frequencies which provide seismic constrains on the distortion of the star. We find that only non-perturbative methods are able to reproduce those two seismic characteristics within 0.01% error bars for stars when they rotate faster than 3.3% Ω k . If error bars of 1% are acceptable, the threshold of validity of perturbative methods is extended to 10% Ω k .
Dupret Marc-Antoine
Goupil Marie Jo
Ouazzani R.-M.
Reese Daniel
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