V Ferrari et al 2004 Class. Quantum Grav. 21 S515 doi:10.1088/0264-9381/21/5/019
V Ferrari1, L Gualtieri1, J A Pons2 and A Stavridis1
Show affiliationsWe 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.
04.30.Db Wave generation and sources
04.40.Dg Relativistic stars: structure, stability, and oscillations
97.10.Cv Stellar structure, interiors, evolution, nucleosynthesis, ages
Issue 5 (7 March 2004)
Received 15 October 2003
Published 5 February 2004
V Ferrari et al 2004 Class. Quantum Grav. 21 S515
S Shinomoto and Y Kabashima 1991 J. Phys. A: Math. Gen. 24 L141
O Levin and A Peres 1994 J. Phys. A: Math. Gen. 27 L143
J Brunnemann and T Thiemann 2006 Class. Quantum Grav. 23 1289
Klaus Desch 2009 JINST 4 P11005
T R Wolinski et al 2006 Meas. Sci. Technol. 17 985
Tomohiro Matsuda 2004 Class. Quantum Grav. 21 L11
A H MacIlraith and M P Fitzgerald 1992 Metrologia 29 285
T Hori et al 2006 J. Phys.: Conf. Ser. 51 47
P Meier et al 1974 J. Phys. B: At. Mol. Phys. 7 L339