Black shells and naked shells

Abstract

We study the collapse of a thin dust shell from the point of view of the horizon dynamics. We identify the critical surfaces at which time and space coordinates interchange their roles and investigate their properties by using the formalism of trapped surfaces. We show the existence of marginally outer trapped surfaces that are associated with the presence of quasi-local horizons. A particular shell configuration that avoids the formation of horizons is interpreted as naked shell.

Typos corrected; references added; new sections and comments added

References in corpus (3)

• Introduction to dynamical horizons in numerical relativity
• The Apparent (Gravitational) Horizon in Cosmology
• Radiating Spherical Collapse for an Inhomogeneous Interior Solution