On geodesics with negative energies in the ergoregions of dirty black holes

2014/12/04 by O. B. Zaslavskii
Physics and Astronomy · #gr-qc #astro-ph.HE #hep-th

paper · pdf · doi:10.1142/s0217732315500558

published as Mod. Phys. Lett. A, 30, 1550055 (2015) · 6 pages

arxiv created 2014/12/04 · arxiv updated 2015/03/27

Abstract

We consider behavior of equatorial geodesics with the negative energy in the ergoregion of a generic rotating "dirty" (surrounded by matter) black hole. It is shown that under very simple and generic conditions on the metric coefficients, there are no such circular orbits. This entails that such geodesic must originate and terminate under the event horizon. These results generalize the observation made for the Kerr metric in A. A. Grib, Yu. V. Pavlov, and V. D. Vertogradov, Mod. Phys. Lett. 29, 1450110 (2014) [arXiv:1304.7360].

Citations

• Geodesics with negative energy in the ergosphere of rotating black holes

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