Dynamical approaches for secular instabilities in rotating stars

Motoyuki Saijo*

*この研究の対応する著者

研究成果: Conference contribution

抄録

We propose a new method of investigating nonlinear dynamics focusing on the physical phenomena of rotating stars in Newtonian gravity which appear in secu- lar timescale. Since acoustic waves normally interact with the surrounding material in dynamical timescale, we need a special technique to achieve secular timescale in dynamical approach. We particularly focus on r-mode instability and construct a nu- merical scheme of killing the effect of acoustic wave by imposing an anelastic condition at every timestep. Although we only explain the rotating star in Newtonian gravity here, this technique can be also applied to relativistic gravitation (conformally at approximation in general relativity). Boundary condition for solving pressure Poisson equation and future extension from the anelastic conditions are also discussed.

本文言語English
ホスト出版物のタイトルProceedings of the 21st Workshop on General Relativity and Gravitation in Japan, JGRG 2011
出版社Kyoto University
ページ104-107
ページ数4
出版ステータスPublished - 2011
外部発表はい
イベント21st Workshop on General Relativity and Gravitation in Japan, JGRG 2011 - Sendai
継続期間: 2011 9月 262011 9月 29

Other

Other21st Workshop on General Relativity and Gravitation in Japan, JGRG 2011
CitySendai
Period11/9/2611/9/29

ASJC Scopus subject areas

  • 原子分子物理学および光学

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