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On the Collapse Dynamics of Cold Stars with a Phase Transition in the Interior
Author(s) -
Kämpfer B.
Publication year - 1982
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2103030404
Subject(s) - physics , gravitational collapse , stars , supernova , neutron star , theory of relativity , general relativity , classical mechanics , astrophysics , phase transition , thermodynamics
Cold stars can become unstable due to a phase transition in the centre. By small perturbations the collapse is triggered toward a new stable configuration. The features of the collapse are studied by means of a parameter‐independent model with piece by piece uniform density. Possible consequences of such a collapse for neutron stars are: extreme speed‐up, heating and a supernova‐like release of binding energy. The dynamical stability properties of the model are considered in the framework of General Relativity. In particular the very beginning of the collapse can be treated by analytical means. In a certain range relativistic effects can prevent a configuration to collapse.