Particle Probe of Horava-Lifshitz Gravity

TL;DR

This paper investigates the geodesic behavior around Kehagias-Sfetsos black holes in Hořava-Lifshitz gravity, revealing weaker gravitational forces and unique orbital properties compared to Schwarzschild black holes, with potential observable implications.

Contribution

It provides a detailed analysis of particle geodesics in KS black holes, highlighting differences from Schwarzschild black holes and exploring observable phenomena in Hořava-Lifshitz gravity.

Findings

Weaker gravitational force near the horizon compared to Schwarzschild.

Existence of new closed orbits for particles.

Classification of geodesic properties based on coupling constants.

Abstract

Kehagias-Sfetsos black hole in Ho\v{r}ava-Lifshitz gravity is probed through particle geodesics. Gravitational force of KS black hole becomes weaker than that of Schwarzschild around horizon and interior space. Particles can be always scattered or trapped in new closed orbits, unlike those falling forever in Schwarzschild black. The properties of null and timelike geodesics are classified with values of coupling constants. The precession rates of the orbits are evaluated. The time trajectories are also classified under different values of coupling constants for both null and timelike geodesics. Physical phenomena that may be observable are discussed.