Heat death and oscillation in model universes containing interacting matter and radiation

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Background Radiation, Cosmology, Electromagnetic Interactions, Irreversible Processes, Thomson Scattering, Entropy, Neutrinos, Relic Radiation

Scientific paper

Continuum and continuum-particle models for both oscillating and ever-expanding model universes are considered, with the consequences of various interactions between the components being traced and the connection with the irreversibility of oscillating models noted. It is for the first time shown that the relativistic equations allow the energy of an oscillating model universe to decrease by the end of a cycle, as is illustrated by a hypothetical model in which the matter temperature initially exceeds the radiation temperature. In addition, a novel continuum-particle model is introduced which is suitable for a study of universes with oscillation, or infinite expansion, and includes He formation and the effect of the Thomson interaction between matter and radiation.

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