Nonlinear effect of R-mode instability in uniformly rotating stars

Motoyuki Saijo

Nonlinear effect of R-mode instability in uniformly rotating stars

Motoyuki Saijo^*

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	RESCEU Symposium on General Relativity and Gravitation, JGRG 22
Pages	111409
Number of pages	1
Publication status	Published - 2012
Externally published	Yes
Event	22nd Workshop on General Relativity and Gravitation in Japan 2012, JGRG 22 - Hongo, Tokyo Duration: 2012 Nov 12 → 2012 Nov 16

Other

Other	22nd Workshop on General Relativity and Gravitation in Japan 2012, JGRG 22
City	Hongo, Tokyo
Period	12/11/12 → 12/11/16

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

Cite this

@inproceedings{236966a071154fdcb71f7e910d147f88,

title = "Nonlinear effect of R-mode instability in uniformly rotating stars",

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.",

author = "Motoyuki Saijo",

year = "2012",

language = "English",

pages = "111409",

booktitle = "RESCEU Symposium on General Relativity and Gravitation, JGRG 22",

note = "22nd Workshop on General Relativity and Gravitation in Japan 2012, JGRG 22 ; Conference date: 12-11-2012 Through 16-11-2012",

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T1 - Nonlinear effect of R-mode instability in uniformly rotating stars

AU - Saijo, Motoyuki

PY - 2012

Y1 - 2012

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84889640833&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84889640833&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84889640833

SP - 111409

BT - RESCEU Symposium on General Relativity and Gravitation, JGRG 22

T2 - 22nd Workshop on General Relativity and Gravitation in Japan 2012, JGRG 22

Y2 - 12 November 2012 through 16 November 2012

ER -

Nonlinear effect of R-mode instability in uniformly rotating stars

Abstract

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ASJC Scopus subject areas

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