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A New Window into Black Holes

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arxiv 2006.10750 v2 pith:3ANTTODH submitted 2020-06-18 hep-th astro-ph.HEgr-qchep-ph

classification hep-thastro-ph.HEgr-qchep-ph
keywords blackholesratioscomputedimensionlesskerrmomentssupersymmetric
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We develop a formalism to compute the gravitational multipole moments and ratios of moments of non-extremal and of supersymmetric black holes in four dimensions, as well as of horizonless microstate geometries of the latter. For supersymmetric and for Kerr black holes many of these multipole moments vanish, and their dimensionless ratios are ill-defined. We present two methods to compute these dimensionless ratios, which for certain supersymmetric black holes agree spectacularly. We also compute these dimensionless ratios for the Kerr solution. Our methods allow us to calculate an infinite number of hitherto unknown parameters of Kerr black holes, giving us a new window into their physics.

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Cited by 1 Pith paper

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  1. Probing time-dependent scalar wigs with extreme mass ratio inspirals

    gr-qc 2024-12 conditional novelty 6.0 of 10

    For EMRIs where the smaller black hole carries an oscillating scalar cloud with mass 0.001 <= mu_s m_p <= 0.02, the scalar energy flux is negligible, so the inspiral and gravitational waveform are essentially unchanged.

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