快速旋转恒星的振荡

Third Coast Pub Date : 2001-11-23 DOI:10.1553/CIA147S65
B. Dintrans, M. Rieutord
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引用次数: 4

摘要

用精确的二维数值方法研究了快速自转对恒星脉动的影响。我们将这些非微扰计算结果与微扰方法的结果进行了比较,发现当旋转速率为开普勒极限的15%时,一半模态的频率差超过0.08 μHz。两种结果的差异主要归因于微扰方法对离心力的近似处理。我们还探讨了科里奥利力的不同近似水平。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Oscillations of rapidly rotating stars
The effects of rapid rotation on stellar pulsation is examined using an accurate 2D numerical method. We compare the results of these non-perturbative calculations with those of perturbative methods and find that frequency differences exceed 0.08 μHz on half of the modes when the rotation rate is 15% of the keplerian (break-up) limit. The differences between the two results is mainly attributed to the approximate treatment of the centrifugal force in perturbative methods. We also explore different levels of approximation for the Coriolis force.
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