Stationarity of Extremum Entropy Fluid Bodies in General Relativity

Abstract

We consider perfect fluid bodies ("stars") in general relativity that are axisymmetric, asymptotically flat, and that admit a maximal hypersurface. We show that configurations that extremize the total entropy at fixed ADM mass, ADM angular momentum, and total particle number are stationary with circular flow. For such stars, this establishes that thermodynamic equilibrium implies dynamic equilibrium.

28 pages; v2: typo fixed in eq. (39), other minor changes

References in corpus (1)

• Black holes and black hole thermodynamics without event horizons

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• Universality of entropy principle for a general diffeomorphism-covariant purely gravitational theory