The collapse of differentially rotating supermassive stars: Conformally flat simulations

Motoyuki Saijo*

*この研究の対応する著者

研究成果: Article査読

25 被引用数 (Scopus)

抄録

We investigate the gravitational collapse of rapidly rotating relativistic supermassive stars by means of 3 + 1 hydrodynamic simulations in conformally flat spacetime of general relativity. We study the evolution of differ-entially rotating supermassive stars of q ≡ J/M2 ∼ 1 (J is the angular momentum, and M is the gravitational mass of the star) from the onset of radial instability at R/M ∼ 65 (R is the circumferential radius of the star) to the point at which the conformally flat approximation breaks down. We find that the collapse of a star of q ≳ 1, a radially unstable differentially rotating star, forms a black hole of q ≲ 1. The main reason preventing formation of a black hole of q ≳ 1 is that quite a large amount of angular momentum stays at the surface. We also find that most of the mass density collapses coherently to form a supermassive black hole with no appreciable disk or bar. In the absence of nonaxisymmetric deformation, the collapse of differentially rotating supermassive stars from the onset of radial instability are promising sources of burst and quasi-normal ringing waves seen with the Laser Interferometer Space Antenna.

本文言語English
ページ(範囲)866-879
ページ数14
ジャーナルAstrophysical Journal
615
2 I
DOI
出版ステータスPublished - 2004 11 10
外部発表はい

ASJC Scopus subject areas

  • 宇宙惑星科学

フィンガープリント

「The collapse of differentially rotating supermassive stars: Conformally flat simulations」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル