Gravitational Radiation from a Naked Singularity. II - Even-Parity Perturbation -

Details Gravitational Radiation from a Naked Singularity. II - Even-Parity Perturbation - Gravitational Radiation from a Naked Singularity. II - Even-Parity Perturbation -

1999-11-18

arxiv.org/abs/gr-qc/9911063v2

Prog.Theor.Phys. 103 (2000) 53-72

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

16 pages, 5 figures, errors and typos corrected, final version

Scientific paper

10.1143/PTP.103.53

A naked singularity occurs in the generic collapse of an inhomogeneous dust ball. We study the even-parity mode of gravitational waves from a naked singularity of the Lema\^{\i}tre-Tolman-Bondi spacetime. The wave equations for gravitational waves are solved by numerical integration using the single null coordinate. The result implies that the metric perturbation grows when it approaches the Cauchy horizon and diverges there, although the naked singularity is not a strong source of even-parity gravitational radiation. Therefore, the Cauchy horizon in this spacetime should be unstable with respect to linear even-parity perturbations.

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