Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2000-04-30
Phys.Rev. D63 (2001) 064019
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
19 pages, 14 figures, REVTEX
Scientific paper
10.1103/PhysRevD.63.064019
The excitation of neutron stars is expected to be an important source of gravitational radiation. Of fundamental importance is then to investigate mechanisms that trigger oscillations in neutron stars in order to characterize the emitted radiation. We present results from a numerical study of the even-parity gravitational radiation generated from a particle orbiting a neutron star. We focus our investigation on those conditions on the orbital parameters that favor the excitation of $w$-modes. We find that, for astrophysically realistic conditions, there is practically no $w$-mode contribution to the emitted radiation. Only for particles with ultra-relativistic orbital speeds $\ge 0.9c$, the $w$-mode does significantly contribute to the total emitted gravitational energy. We also stress the importance of setting consistent initial configurations.
Laguna Pablo
Pullin Jorge
Ruoff Johannes
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