## 抄録

We study the nature of non-axisymmetric dynamical instabilities in differentially rotating stars with both linear eigenmode analysis and hydrodynamic simulations in Newtonian gravity. We especially investigate the following three types of instability; the one-armed spiral instability, the low T/|W| bar instability, and the high T/|W| bar instability, where T is the rotational kinetic energy and W is the gravitational potential energy. The nature of the dynamical instabilities is clarified by using a canonical angular momentum as a diagnostic. We find that the one-armed spiral and the low T/|W| bar instabilities occur around the corotation radius, and they grow through the inflow of canonical angular momentum around the corotation radius. The result is a clear contrast to that of a classical dynamical bar instability in high T/|W|. We also discuss the feature of gravitational waves generated from these three types of instability.

本文言語 | English |
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ホスト出版物のタイトル | AIP Conference Proceedings |

ページ | 728-735 |

ページ数 | 8 |

巻 | 861 |

DOI | |

出版ステータス | Published - 2006 |

外部発表 | はい |

イベント | Albert Einstein Century International Conference - Paris 継続期間: 2005 7月 18 → 2005 7月 22 |

### Other

Other | Albert Einstein Century International Conference |
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City | Paris |

Period | 05/7/18 → 05/7/22 |

## ASJC Scopus subject areas

- 物理学および天文学（全般）