6533b7d8fe1ef96bd126a59d
RESEARCH PRODUCT
Gravitational Waves from Rotating Proto-Neutron Stars
José A. PonsValeria FerrariA. StavridisLeonardo Gualtierisubject
PhysicsPhysics and Astronomy (miscellaneous)SpacetimeGravitational waveAstrophysics (astro-ph)FOS: Physical sciencesGeneral Relativity and Quantum Cosmology (gr-qc)AstrophysicsAstrophysicsRotationInstabilityGeneral Relativity and Quantum CosmologyNeutron starNormal modeExcited stateAstrophysics::Solar and Stellar AstrophysicsCowlingdescription
We study the effects of rotation on the quasi normal modes (QNMs) of a newly born proto neutron star (PNS) at different evolutionary stages, until it becomes a cold neutron star (NS). We use the Cowling approximation, neglecting spacetime perturbations, and consider different models of evolving PNS. The frequencies of the modes of a PNS are considerably lower than those of a cold NS, and are further lowered by rotation; consequently, if QNMs were excited in a sufficiently energetic process, they would radiate waves that could be more easily detectable by resonant-mass and interferometric detectors than those emitted by a cold NS. We find that for high rotation rates, some of the g-modes become unstable via the CFS instability; however, this instability is likely to be suppressed by competing mechanisms before emitting a significant amount of gravitational waves.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-09-24 |