Nonlinear effect of R-mode instability in uniformly rotating stars

Motoyuki Saijo

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

Abstract

We investigate the r-mode instability of uniformly rotating stars by means of three dimensional hydrodynamical simulations in Newtonian gravity with radiation reaction We have succeeded in constructing a nonlinear anelastic approximation in the rotating reference frame, which kills the propagation of sound speed, in order to evolve the system beyond the dynamical timescale. When the current multipole contribution is dominant to the r-mode instability (density fluctuation effect is negligible), the instability seems to last for at least hundreds of rotation periods Studies of no anelastic approximation with small amplitude of velocity perturbation may help us for a better understanding.

Original languageEnglish
Title of host publicationRESCEU Symposium on General Relativity and Gravitation, JGRG 22
Pages111409
Number of pages1
Publication statusPublished - 2012
Externally publishedYes
Event22nd Workshop on General Relativity and Gravitation in Japan 2012, JGRG 22 - Hongo, Tokyo
Duration: 2012 Nov 122012 Nov 16

Other

Other22nd Workshop on General Relativity and Gravitation in Japan 2012, JGRG 22
CityHongo, Tokyo
Period12/11/1212/11/16

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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