Stable gravastars - an alternative to black holes?

Type of content
Journal Article
Thesis discipline
Degree name
Publisher
University of Canterbury. Physics and Astronomy
Journal Title
Journal ISSN
Volume Title
Language
Date
2004
Authors
Visser, M.
Wiltshire, D.L.
Abstract

The “gravastar” picture developed by Mazur and Mottola is one of a very small number of serious challenges to our usual conception of a “black hole”. In the gravastar picture there is effectively a phase transition at / near where the event horizon would have been expected to form, and the interior of what would have been the black hole is replaced by a segment of de Sitter space. While Mazur and Mottola were able to argue for the thermodynamic stability of their configuration, the question of dynamic stability against spherically symmetric perturbations of the matter or gravity fields remains somewhat obscure. In this article we construct a model that shares the key features of the Mazur–Mottola scenario, and which is sufficiently simple for a full dynamical analysis. We find that there are some physically reasonable equations of state for the transition layer that lead to stability

Description
Available online via the Institute of Physics site by subscription.
Citation
Visser, M., Wiltshire, D.L. (2004) Stable gravastars - an alternative to black holes?. Classical and Quantum Gravity, 21(4), pp. 1135-1151.
Keywords
Gravastar, black hole, phase transition, de Sitter
Ngā upoko tukutuku/Māori subject headings
ANZSRC fields of research
Field of Research::02 - Physical Sciences::0201 - Astronomical and Space Sciences
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