The role of spin in cosmological models

Details The role of spin in cosmological models The role of spin in cosmological models

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984nciml..41...73b&link_type=abstract

Nuovo Cimento, Lettere, Serie 2, vol. 41, Sept. 15, 1984, p. 73, 74. Research supported by the Conselho Nacional de Pesquisas, a

Mathematics

Logic

6

Astronomical Models, Cosmology, Ideal Fluids, Spin, Gravitation Theory, Hydrodynamic Equations, Relativity, Spin-Spin Coupling, Tensor Analysis

Scientific paper

The classical description of spin in a perfect fluid of Ray and Smalley (1982) and its energy-momentum-tensor formulation are applied to cosmological models. The Raychaudhuri equation for the evolution of a continuous matter distribution in hydrodynamic motion is analyzed, and the role of spin and torsion in the Einstein-Cartan theory of gravitation (Hehl et al., 1976) is compared to that of spin in general relativity. It is found that spin-spin interaction is significant only at extremely high densities, and that spin-vorticity interactions are of potential importance at high vorticity, as in the early moments of cosmological models.

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