Cosmological horizons and the generalised second law of thermodynamics

Details Cosmological horizons and the generalised second law of thermodynamics Cosmological horizons and the generalised second law of thermodynamics

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987cqgra...4l.225d&link_type=abstract

Classical and Quantum Gravity (ISSN 0264-9381), vol. 4, Nov. 1, 1987, p. L225-L228.

Astronomy and Astrophysics

Astronomy

70

Cosmology, Entropy, Schwarzschild Metric, Black Holes (Astronomy), Extraterrestrial Radiation, Gravitational Fields

Scientific paper

The paper investigates the change in event-horizon area in cosmological models that depart slightly from de Sitter space. If the gravitational source is a perfect inviscid fluid satisfying the dominant energy condition, the area is proved to be nondecreasing. If the fluid is viscous, the area can decrease, but the attendant generation of entropy ensures that the generalized second law of thermodynamics remains unviolated.

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