Gravitational Collapse of a Radiating Shell

TL;DR

This paper models the quantum effects in a collapsing radiating shell, showing that quantum excitations lead to thermal radiation emission during black hole formation.

Contribution

It introduces a semiclassical model where quantum excitations of the shell induce thermal radiation emission during collapse.

Findings

Quantum non-adiabaticity excites shell degrees of freedom.

Collapsing shell emits coherent thermal radiation.

Model provides insights into black hole formation processes.

Abstract

We study the collapse of a self-gravitating and radiating shell. Matter constituting the shell is quantized and the construction is viewed as a semiclassical model of possible black hole formation. It is shown that the shell internal degrees of freedom are excited by the quantum non-adiabaticity of the collapse and, consequently, on coupling them to a massless scalar field, the collapsing matter emits a burst of coherent (thermal) radiation.