Shear-free perfect fluids with a solenoidal magnetic curvature

Details Shear-free perfect fluids with a solenoidal magnetic curvature Shear-free perfect fluids with a solenoidal magnetic curvature

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cqgra..26s5002c&link_type=abstract

Classical and Quantum Gravity, Volume 26, Issue 19, pp. 195002 (2009).

Physics

3

Scientific paper

We investigate shear-free perfect fluid solutions of the Einstein field equations where the fluid pressure satisfies a barotropic equation of state and the spatial divergence of the magnetic part of the Weyl tensor is zero. We prove, with the exception of certain quite restricted special cases within the class of solutions in which there exists a Killing vector aligned with the vorticity and for which the magnitude of the vorticity ω is not a function of the matter density μ alone, that such a fluid is either non-rotating or non-expanding. In the restricted cases the equation of state must satisfy an over-determined differential system.

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