Entropy generation and limits on the anisotropy of the early universe

Details Entropy generation and limits on the anisotropy of the early universe Entropy generation and limits on the anisotropy of the early universe

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.205..675v&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 205, Nov. 1983, p. 675-681.

Astronomy and Astrophysics

Astronomy

3

Anisotropic Fluids, Baryons, Cosmology, Entropy, Nuclear Fusion, Unified Field Theory, Collisional Plasmas, Energy Dissipation, Flux Density, Relativistic Plasmas, Shear Flow, Universe

Scientific paper

An estimate is made of the maximum rate at which the entropy of the primordial plasma increases in the presence of a homogeneous shear in a Bianchi type I cosmology. The minimum entropy increase is also derived using a GUT cross-section. The author tentatively concludes that baryon synthesis arguments allow him to set limits on the shear density at nucleosynthesis which are many orders of magnitude smaller than the limits based on nucleosynthesis calculations.

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