A generalization of the concept of adiabatic index for non-adiabatic systems

Details A generalization of the concept of adiabatic index for non-adiabatic systems A generalization of the concept of adiabatic index for non-adiabatic systems

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ap%26ss.187..271b&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 187, no. 2, Jan. 1992, p. 271-290.

Astronomy and Astrophysics

Astrophysics

10

Equations Of State, Gravitational Collapse, Radiation Transport, Relativistic Theory, Einstein Equations, Gravitation Theory, Magnetohydrodynamics

Scientific paper

The concept of adiabatic index, measuring the stiffness of the equation of state for adiabatic systems, and which plays a fundamental role in the study of gravitational collapse, is extended to systems emitting and/or absorbing energy. In the light of the new definition, the collapse of two models of radiating, general relativistic spheres is analyzed in detail, at different regimes of radiation transport. The conspicuous role played by the new variable is clearly exhibited.

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