Shearfree perfect fluids with solenoidal magnetic curvature and a gamma-law equation of state
arXiv:0704.3372 · doi:10.1088/0264-9381/24/14/012
Abstract
We show that shearfree perfect fluids obeying an equation of state p=(gamma -1) mu are non-rotating or non-expanding under the assumption that the spatial divergence of the magnetic part of the Weyl tensor is zero.
11 pages