For charges held near a gravastar, the self-force carries information about the interior, giving explicitly computable differences from the black-hole case.
Self-force of a point charge in the space-time of a massive wormhole
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abstract
We consider the self-potential and the self-force for an electrically charged particle at rest in the massive wormhole space-time. We develop general approach for the renormalization of electromagnetic field of such particle in the static space-times and apply it to the space-time of the wormhole with parameter of the mass, $m$. The self-force is found in manifest form; it is an attractive force. We discus the peculiarities due to massive parameter of the wormhole.
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Self-Forces as Nonlocal Probes of Gravastar Interiors
For charges held near a gravastar, the self-force carries information about the interior, giving explicitly computable differences from the black-hole case.