Low-frequency oscillations in rotating stars

研究成果: Chapter

1 被引用数 (Scopus)

抄録

We review the properties of low-frequency oscillations in uniformly rotating stars. Rotation not only yields a new class of modes, like inertial modes and r-modes, but also significantly modifies the properties of low-frequency g-modes. For slow rotation rates where |Ω/ω| ≪ 1, we can treat the rotation frequency Ω as a small parameter for perturbation analysis, but for |Ω/ω| ≮< 1, we have to properly solve the oscillation equation given as a set of partial differential equations, taking account of the effects of the Coriolis force and the centrifugal force, where ω stands for the oscillation frequency observed in the corotating frame of the star. The Coriolis force couples modes having different spherical harmonic degrees l, and the centrifugal force deforms the equilibrium structure. Rapid rotation affects the stability and the frequency of low-frequency modes. We discuss perturbation theory, the traditional approximation, linear mode coupling, series expansion methods, and weakly nonlinear calculations, which are applied to low-frequency modes in rotating stars.

本文言語English
ホスト出版物のタイトルStudying Stellar Rotation and Convection
ホスト出版物のサブタイトルTheoretical Background and Seismic Diagnostics
出版社Springer Verlag
ページ133-157
ページ数25
ISBN(印刷版)9783642333798
DOI
出版ステータスPublished - 2013

出版物シリーズ

名前Lecture Notes in Physics
865
ISSN(印刷版)0075-8450

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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