Faraday resonance in dynamical bar instability of differentially rotating stars

Details Faraday resonance in dynamical bar instability of differentially rotating stars Faraday resonance in dynamical bar instability of differentially rotating stars

2008-02-15

arxiv.org/abs/0802.2277v1

Phys.Rev.D77:063002,2008

Astronomy and Astrophysics

Astrophysics

13 pages with 13 figures, revtex4.cls. Accepted for publication in the Physical Review D

Scientific paper

10.1103/PhysRevD.77.063002

We investigate the nonlinear behaviour of the dynamically unstable rotating star for the bar mode by three-dimensional hydrodynamics in Newtonian gravity. We find that an oscillation along the rotation axis is induced throughout the growth of the unstable bar mode, and that its characteristic frequency is twice as that of the bar mode, which oscillates mainly along the equatorial plane. A possibility to observe Faraday resonance in gravitational waves is demonstrated and discussed.

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