Negative heat capacity and non-extensive kinetic theory

Details Negative heat capacity and non-extensive kinetic theory Negative heat capacity and non-extensive kinetic theory

2003-05-31

arxiv.org/abs/astro-ph/0306009v2

Phys.Lett. A313 (2003) 393-396

Astronomy and Astrophysics

Astrophysics

7 pages, 1 figure, revised version to appear in Phys. Lett. A

Scientific paper

10.1016/S0375-9601(03)00858-2

The negative nature of the heat capacity $C_V$ of thermodynamically isolated
self-gravitating systems is rediscussed in the framework of a non-extensive
kinetic theory. It is found that the dependence of $C_V$ on the non-extensive
parameter $q$ gives rise to a negative branch with the critical value
corresponding to $q = 5/3$ ($C_V\to - \infty$).

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