Collapse of a differentially rotating supermassive star to a supermassive black hole

Motoyuki Saijo, Ian Hawke

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We investigate the collapse of differentially rotating supermassive stars by means of 3+1 hydrodynamic simulations in general relativity. We particularly focus on the formation of a rapidly rotating dynamic black hole, and find the following two features. Firstly, quasi-periodic gravitational waves continue to be emitted after the quasi-normal mode frequency has decayed. Secondly, when the newly formed black hole is almost extreme Kerr, the amplitude of the quasi-periodic oscillation is enhanced during the late stages of the evolution. Geometrical features, shock waves, and instabilities of the fluid are suggested as a cause of this amplification behaviour. This alternative scenario for the collapse of differentially rotating supermassive stars might be observable by LISA.

Original languageEnglish
Title of host publication12th Marcel Grossmann Meeting on Recent Dev. in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories - Proc. of the MG 2009 Meeting on General Relativity
Pages801-803
Number of pages3
Publication statusPublished - 2012
Externally publishedYes
Event12th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, MG 2009 - Paris
Duration: 2009 Jul 122009 Jul 18

Other

Other12th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, MG 2009
CityParis
Period09/7/1209/7/18

Keywords

  • Dynamic black hole
  • Gravitational collapse
  • Gravitational waves
  • Numerical relativity
  • Relativistic hydrodynamics
  • Rotating supermassive stars

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Nuclear and High Energy Physics

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  • Cite this

    Saijo, M., & Hawke, I. (2012). Collapse of a differentially rotating supermassive star to a supermassive black hole. In 12th Marcel Grossmann Meeting on Recent Dev. in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories - Proc. of the MG 2009 Meeting on General Relativity (pp. 801-803)