Escape probability of particle from Kerr-Sen black hole

Abstract

Assuming that a particle source is at rest in a locally non-rotating frame on the equatorial plane of the Kerr-Sen black hole, we investigate the escape of the massless particle and massive particle from the black hole to spatial infinity. We calculate the escape probabilities of the emitted particles. We find that the angular momentum of the Kerr-Sen black hole boosts the escape probabilities near the horizon of the extreme Kerr-Sen black hole; however the angular momentum of the Kerr-Sen black hole suppresses the escape probabilities near the horizon of the non-extreme Kerr-Sen black hole. We also discover that the horizon limit of the Kerr-Sen black hole is not the most difficult position to escape for a particle in certain conditions.

8 pages, 5 captioned figures, minor corrections

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Cited by in corpus (4)

• Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A${}^{\ast }$
• Deflection of Light due to Kerr Sen Black Hole in Heterotic String Theory using Material Medium Approach
• Photon emissions from near-horizon extremal and near-extremal Kerr equatorial emitters
• Observability of Zero-angular-momentum Sources Near Kerr Black Holes