Gravitational Radiation from a Naked Singularity(2)Even-Parity Perturbation

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  • Iguchi Hideo
    Department of Physics, Kyoto University, Kyoto 606–8502, Japan
  • Harada Tomohiro
    Department of Physics, Kyoto University, Kyoto 606–8502, Japan
  • Nakao Ken–ichi
    Department of Physics, Osaka City University, Osaka 558–8585, Japan

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

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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 Lemaître-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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