Tachyon motion in a black hole gravitational field

TL;DR

This paper investigates the behavior of superluminal particles, or tachyons, in a black hole's gravitational field, revealing their unstable orbits, escape potential, and possible observable effects near black holes.

Contribution

It provides a detailed analysis of tachyon motion in Schwarzschild spacetime, showing the absence of stable orbits and potential for tachyons to escape black holes.

Findings

No stable circular tachyon orbits in Schwarzschild metric

Tachyons can escape from within the gravitational radius

High-energy tachyons may produce observable effects

Abstract

The motion of superluminal particles in the gravitational field of a non-rotating black hole is analyzed. The relativistic Hamilton-Jacobi equation is solved for particles with imaginary rest mass. It is shown that there are no stable circular orbits and generally no finite motions for tachyons in the Schwarzschild metric and that all unstable circular tachyon orbits lie in a region extending from the gravitational radius to 1.5 times that radius. The particles with speeds exceeding the speed of light are noticed to be able to escape from the space limited by the gravitational radius. The results also indicate that low-energy tachyons near a black hole may acquire higher energies and that this in turn may lead to observable effects.