### Abstract

We investigate the properties of rapidly rotating black hole generated by gravitational collapse of rotating relativistic stars by means of 3 + 1 hydrodynamic simulations in general relativity. Here we focus on the multipole moment of the dynamical black hole to extract some features in dynamical spacetime. We find that the dynamic black hole approaches to a stationary Kerr black hole after the damping timescale of the dynamic black hole from black hole formation. Therefore the existence of the quasi-periodic gravitational waves after the ringdown may connect to the instability of the fluid fragments around the black hole, which forms a disk.

Original language | English |
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Title of host publication | Proceedings of the 20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010 |

Pages | 331-335 |

Number of pages | 5 |

Publication status | Published - 2010 |

Externally published | Yes |

Event | 20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010 - Kyoto Duration: 2010 Sep 21 → 2010 Sep 25 |

### Other

Other | 20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010 |
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City | Kyoto |

Period | 10/9/21 → 10/9/25 |

### ASJC Scopus subject areas

- Atomic and Molecular Physics, and Optics

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## Cite this

*Proceedings of the 20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010*(pp. 331-335)