Perfect fluid cosmology with geodesic world lines

Details Perfect fluid cosmology with geodesic world lines Perfect fluid cosmology with geodesic world lines

Nov 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978phrvd..18.3595r&link_type=abstract

Physical Review D (Particles and Fields), Volume 18, Issue 10, 15 November 1978, pp.3595-3597

Physics

3

Scientific paper

It is shown that for a perfect fluid with an equation of state p=p(ρ), if the world lines are geodesics, then they are hypersurface orthogonal and the scalars p, ρ, σ2, and θ2 are all constants over these hypersurfaces, irrespective of any spatial-homogeneity assumption. However, an examination of some simple cases does not reveal any spatially nonhomogeneous solution with these properties.

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