Self-gravitating radiation in AdS(d)

Abstract

We study spherically symmetric equilibrium configurations of self-gravitating massless thermal radiation in asymptotically anti-de Sitter space. In d=4, it was shown by Page and Phillips that there is a maximum red-shifted temperature, maximum mass and maximum entropy. For higher central densities, the temperature, mass and entropy undergo an infinite series of damped oscillations, corresponding to unstable configurations. We extend this work to all dimensions $d\ge 3$. We find that in $4\le d\le 10$, the behaviour is similar to the d=4 case. In $d\ge 11$, the temperature, mass and entropy are monotonic functions of the central density, asymptoting to their maxima as the central density goes to infinity. In d=3, an exact solution is given by a slice of the AdS C-metric.

21 pages, 4 figures, JHEP style; revised version

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