A Tachyon Field around the Black Hole

TL;DR

This paper investigates how a tachyon field influences black hole mass evolution, revealing that it can cause mass accretion or decrease independently of Hawking radiation, depending on the potential type.

Contribution

It demonstrates the impact of tachyon fields on black hole dynamics and explores mass evolution under various potentials, a novel aspect in black hole physics.

Findings

Tachyon fields cause black hole mass accretion.

Under certain potentials, black hole mass can decrease without Hawking radiation.

Mass evolution depends on the tachyon potential type.

Abstract

We study the effects of the presence of the tachyon field around the black hole. We show that in presence of the tachyon field, unlike the ordinary canonical scalar field, the time evolution of the black hole mass depends on the potential of this field. By considering several types of potential, we study the behavior of the black hole mass and its time evolution and find some interesting results. We find that the presence of the tachyon field causes the accretion of the mass into the black hole. We also show that with linear and hilltop potentials, in some ranges of the parameters space, the mass of the black hole can decrease even without any Hawking radiation.