Year: 1993
Type: article
Abstract: Based on earlier work of Einstein (1939), the authors construct exact solutions of thick shells with zero radial pressure around black holes. The thick shells are built of layers of spherically symmetric thin shells containing collisionless particles travelling circular geodesics. Using the 'turning point' method of Poincare (1885) in the same way as Einstein they also demonstrate that thick shells which are big enough are mechanically stable. The inner radius of stable thick shells is smaller than the inner radius of stable thin shells. This result is relevant for thermal equilibrium black holes since these thick shells can have applications as heat baths producing the thermodynamic boundary conditions.
Source: Classical and Quantum Gravity
Authors: G L Comer, J Katz
Institution: Hebrew University of Jerusalem
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funder: Hebrew University of Jerusalem
OpenAlex ID: W2017001652