Gravitational collapse of a radiating shell and radiation bursts

TL;DR

This paper investigates how a collapsing bosonic shell interacts with a scalar radiation field, leading to energy absorption, excitation, and emission of radiation bursts, with implications for gravitational collapse dynamics.

Contribution

It introduces a model of a radiating bosonic shell that accounts for quantum excitations and radiation emission during gravitational collapse.

Findings

Shell absorbs energy from gravitational field due to non-adiabatic collapse

Excited internal degrees of freedom emit thermal radiation bursts

Backreaction effects influence the collapse trajectory

Abstract

We study the collapse of a self-gravitating thick shell of bosons coupled to a scalar radiation field. Due to the non-adiabaticity of the collapse, the shell (quantum) internal degrees of freedom absorb energy from the (classical) gravitational field and are excited. The excitation energy is then emitted in the form of bursts of (thermal) radiation and the corresponding backreaction on the trajectory is estimated.