Evolution of massive fields around a black hole in Horava gravity

TL;DR

This paper investigates how massive scalar fields evolve around Kehagias-Sfetsos black holes in Horava-Lifshitz gravity, revealing distinctive quasinormal mode signatures that differ from Schwarzschild black holes.

Contribution

It provides a numerical analysis of scalar field evolution in HL gravity, highlighting the impact of HL parameters on quasinormal modes and field relaxation behaviors.

Findings

HL theory extends quasinormal mode duration

QNM frequencies are higher and damping lower in HL

Field behavior in late stages matches Schwarzschild case

Abstract

We study the evolution of massive scalar field in the spacetime geometry of Kehagias-Sfetsos(KS) black hole in deformed Horava-Lifshitz(HL) gravity by numerical analysis. We find that the signature of HL theory is encoded in the quasinormal mode(QNM) phase of the evolution of field. The QNM phase in the evolution process lasts for a longer time in HL theory. QNMs involved in the evolution of massive field are calculated and find that they have a higher oscillation frequency and a lower damping rate than the Schwarzschild spacetime case. We also study the relaxation of field in the intermediate and asymptotic range and verified that behaviors of field in these phases are independent of the HL parameter and is identical to the Schwarzschild case.