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Evaporating black holes: constraints on anomalous emission mechanisms

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arxiv 2107.14244 v2 pith:OFH2WBDK submitted 2021-07-29 gr-qc astro-ph.HEhep-th

Evaporating black holes: constraints on anomalous emission mechanisms

classification gr-qc astro-ph.HEhep-th
keywords blackemissionholesbinariesgravitationalmechanismsratewaves
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Hawking radiation of astrophysical black holes is minute and thought to be unobservable. However, different mechanisms could contribute to an anomalously high emission rate: extra dimensions, new "dark" families of bosons or fermions, or a lower fundamental Planck scale. Do black holes flood the Universe with gravitational waves via mass loss? Here, we show that the formation of black hole binaries and the absence of a stochastic background of gravitational waves can limit the emission rate to $|\dot{M}|\lesssim 10^{-15}M_{\odot}/{\rm yr}$, seven orders of magnitude more stringent than bounds from resolvable inspiralling binaries.

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