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Mode stability of a near-extremal Kerr superspinar

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arxiv 1911.06169 v1 pith:EHTPWDAW submitted 2019-11-14 gr-qc

Rittick Roy , Prashant Kocherlakota , Pankaj S. Joshi This is my paper
classification gr-qc
keywords modekerrnear-extremalobjectsstabilitysuperspinarunderalmost
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We study here the quasi-normal mode stability of a near-extremal Kerr superspinar, an exotic spinning compact object that exceeds the Kerr bound, under gravitational perturbations. Despite previous beliefs that these objects would be mode unstable, we show by analytically treating the Teukolsky equations that these objects are in fact mode stable under almost all (barring a zero-measure set) boundary conditions.

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