Weak Cosmic Censorship in Kerr-Sen Black Hole under Charged Scalar Field

Abstract

We investigate the weak cosmic censorship conjecture for Kerr-Sen black holes, which are solutions to the four-dimensional low-energy effective field theory for the heterotic string theory, based on the scattering of a charged scalar field. When the fluxes of the scalar field are assumed to transfer its conserved quantities to the black hole, extremal and near-extremal black holes cannot be over-spun and over-charged in their first-order variations, which is sufficient to conclude that the weak cosmic censorship conjecture is valid for Kerr-Sen black holes. We confirm our conclusion by relating it to the first, second, and third laws of thermodynamics.

15 pages, 5 figures, published in JCAP

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• On overspinning of black holes in higher dimensions
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• Proof of the weak cosmic censorship conjecture for several extremal black holes
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• Thermodynamics in Rotating Anti-de Sitter Black Holes with Massive Scalar Field in Three Dimensions
• Overspinning a rotating black hole in semiclassical gravity with type-A trace anomaly
• Test fields and naked singularities: is the second law the cosmic censor?
• Evidence for NO violation of the second law in extended black hole thermodynamics
• Thermodynamics of Warped Anti-de Sitter Black Holes under Scattering of Scalar Field
• Overcharging a nonsingular black hole in general relativity: the nonlinear electrodynamic field effects
• Shadows for Kerr-Sen-Taub-NUT black holes with Manko-Ruiz parameter