On Slowly Rotating Cosmological Viscous Fluid Model Universes in General Relativity

Details On Slowly Rotating Cosmological Viscous Fluid Model Universes in General Relativity On Slowly Rotating Cosmological Viscous Fluid Model Universes in General Relativity

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ap%26ss.182..207m&link_type=abstract

Astrophysics and Space Science, Volume 182, Issue 2, pp.207-219

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

The dynamics of a slowly-rotating cosmological viscous-fluid universe is investigated and the rotational perturbations of such models are studied in order to substantiate the possibility that the Universe is endowed with slow rotation, in the course of presentation of some new analytic solutions. Three different cases are taken up in which the nature and role of the metric rotation Ω(r, t) as well as that of the matter rotation ω(r, t) are discussed. The periods of physical validity of some of the models and the effect of viscosity on the rotational motion are also found out. Rotating models which are expanding as well are obtained, where in all the cases the rotational velocities are found to decay with the time; and these models may be taken as good examples of real astrophysical situations.

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