Tidal forces in Reissner–Nordström spacetimes

The European Physical Journal C

Atsushi Higuchi¹  Leandro A. Oliveira¹  Ednilton S. de Oliveira²  Luís C. B. Crispino² 

[1] Department of Mathematics, University of York, Heslington, YO10 5DD, York, UK;Faculdade de Física, Universidade Federal do Pará, 66075-110, Belém, Pará, Brazil;

关键词: Black Hole;    Event Horizon;    Radial Component;    Tidal Force;    Charged Black Hole;   

DOI  :  10.1140/epjc/s10052-016-3972-5

来源: Springer

【 摘 要 】

We analyze the tidal forces produced in the spacetime of Reissner–Nordström black holes. We point out that the radial component of the tidal force changes sign just outside the event horizon if the charge-to-mass ratio is close to 1, unlike in Schwarzschild spacetime of uncharged black holes, and that the angular component changes sign between the outer and inner horizons. We solve the geodesic deviation equations for radially falling bodies toward the charged black hole. We find, for example, that the radial component of the geodesic deviation vector starts decreasing inside the event horizon unlike in the Schwarzschild case.

【 授权许可】

CC BY