A modified Robertson-Walker cosmological model

Details A modified Robertson-Walker cosmological model A modified Robertson-Walker cosmological model

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gregr..22.1413s&link_type=abstract

General Relativity and Gravitation, Volume 22, Issue 12, pp.1413-1421

Mathematics

Logic

Scientific paper

We consider a modified Robertson-Walker (R-W) cosmological model withK= +1 which tends towards the R-W model in future. The model has expansion, shear and rotation and is filled with matter together with radiation. Shear and rotation are shown to decrease with time. The evolutions of pressure, matter density and radiation density are studied. This model may approximately represent the actual situation in our universe which may have had some rotation in the past and was dominated by radiation. The only unsatisfactory feature of this model is that the pressure does not remain positive throughout.

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