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arXiv · 2208.14262

Tidal heating in a Riemann-Cartan spacetime

Sudipta Hensh·Stefano Liberati·Vincenzo Vitagliano
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Abstract

We consider possible perturbations of the black hole event horizon induced by matter with spin, extending the derivation of the Hawking-Hartle formula (tidal heating) in the presence of torsion. When specialised to theories with a non-vanishing (pseudo-)traceless component of the (con)torsion tensor, we remarkably find that the tidal heating phenomenon gets modified by additional torsion-dependent terms, in agreement with previous investigations based on Jacobson's spacetime thermodynamics approach. These results lead to relevant phenomenological and theoretical consequences: modifications in the Hawking-Hartle term change the Bondi mass associated with the gravitational radiation observed at infinity, and modify the Hawking radiation spectrum of evaporating black holes.

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Sudipta Hensh, Stefano Liberati, Vincenzo Vitagliano. 2023-03-22. Tidal heating in a Riemann-Cartan spacetime. https://doi.org/10.1103/physrevd.107.064020

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