Cherenkov radiation in a gravitational wave background

TL;DR

This paper investigates how Cherenkov radiation can occur in a vacuum influenced by non-linear gravitational waves, revealing conditions under which curvature interactions produce detectable radiation patterns.

Contribution

It introduces a covariant criterion for Cherenkov radiation in gravitational wave backgrounds within exact integrable models, highlighting vacuum-curvature interactions as a radiation source.

Findings

Cherenkov radiation can be generated in curved spacetime due to gravitational waves.

The spatial distribution of radiation is conical and shaped by curvature effects.

Vacuum interactions with curvature can lead to observable Cherenkov radiation.

Abstract

A covariant criterion for the Cherenkov radiation emission in the field of a non-linear gravitational wave is considered in the framework of exact integrable models of particle dynamics and electromagnetic wave propagation. It is shown that vacuum interacting with curvature can give rise to Cherenkov radiation. The conically shaped spatial distribution of radiation is derived and its basic properties are discussed.