The role of expansion for the entropy of the universe

Details The role of expansion for the entropy of the universe The role of expansion for the entropy of the universe

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ap%26ss.186..157u&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 186, no. 1, Dec. 1991, p. 157, 158.

Astronomy and Astrophysics

Astronomy

Cosmic Gases, Entropy, Universe, Black Holes (Astronomy), Cosmology, Expansion, Gravitational Effects

Scientific paper

It is proposed, under the assumption of the closed Friedmann-Robertson-Walker universe, that the cosmological expansion/contraction on its own has an entropy balancing effectively the changing entropy of the cosmic fluid in such a way that at every epoch the total entropy of the universe remains constant. It is argued that, thermodynamically, the universe, as a whole, behaves like a self-gravitating formation of an adiabatic gas, quite regardless of the processes occurring in the cosmic fluid.

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