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Compressibility of rotating black holes · Around

2011

Compressibility of rotating black holes

Dolan, Brian P.

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Interpreting the cosmological constant as a pressure, whose thermodynamically conjugate variable is a volume, modifies the first law of black hole thermodynamics.

Properties of the resulting thermodynamic volume are investigated: the compressibility and the speed of sound of the black hole are derived in the case of non-positive cosmological constant.
The adiabatic compressibility vanishes for a non-rotating black hole and is maximal in the extremal case --- comparable with, but still less than, that of a cold neutron star.
A speed of sound $v_s$ is associated with the adiabatic compressibility, which is is equal to $c$ for a non-rotating black hole and decreases as the angular momentum is increased.

Built on

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Then

S. Wang, S-Q. Wu, F. Xie and L. Dan, Chin. Phys. Lett
2006
Later among the works it cites.
B.P. Dolan, Class. Quantum Grav
Original
2011
Closest in time.
B.P. Dolan, Class. Quantum Grav
Original
2011
Closest in time.

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