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Scalar Emission in the Bulk in a Rotating Black Hole Background

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arxiv 0709.0241 v2 pith:GG3CVNJW submitted 2007-09-03 hep-th astro-phgr-qchep-ph

classification hep-thastro-phgr-qchep-ph
keywords emissionanalyticblackbulkenergyholerotatingscalar
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We study the emission of scalars into the bulk from a higher-dimensional rotating black hole. We obtain an analytic solution to the field equation by employing matching techniques on expressions valid in the near-horizon and far-field regimes. Both analytic and numerical results for the absorption probability, in the low-energy and low-angular momentum limit, are derived and found to be in excellent agreement. We also compute the energy emission rate, and show that the brane-to-bulk ratio of the energy emission rates for scalar fields remains always larger than unity in the aforementioned regime.

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Cited by 1 Pith paper

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  1. Extreme mass ratio inspirals around topological stars

    gr-qc 2025-04 conditional novelty 6.0 of 10

    A scalar charge orbiting a topological star produces fluxes that deviate from the black hole case and can dephase by up to 10^4 radians over a year, while QNM resonances are too narrow to be observable.

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