Effect of stellar rotation on oscillation frequencies

被引：2
|
作者：
Ouazzani, R. M. [1 ,2 ]
Goupil, M. J. [1 ]
Dupret, M. A. [3 ]
Reese, D. [1 ,4 ]
机构：
[1] Observ Paris, LESIA, F-92195 Meudon, France
[2] Univ Paris 06, F-75252 Paris, France
[3] Univ Liege, Inst Astrophys & Geophys, B-4000 Liege, Belgium
[4] Univ Sheffield, Dept Appl Math, Sheffield S3 7RH, S Yorkshire, England
来源：
ASTROPHYSICS AND SPACE SCIENCE | 2010年 / 328卷 / 1-2期
关键词：
Stellar rotation; Perturbative methods; Splitting; Differential rotation; Stellar oscillation; Beta Cephei; NU-ERIDANI; STARS;
D O I：
10.1007/s10509-010-0307-0
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We investigate whether the rotational splittings of beta 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%Omega(k). If error bars of 1% are acceptable, the threshold of validity of perturbative methods is extended to 10%Omega(k).
引用
收藏
页码：285 / 289
页数：5
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