Direction-dependent Jeans instability in an anisotropic Bianchi Type I space-time

May, 2008
10 pages
e-Print:
Report number:
  • CALT-68-2683

Citations per year

20082010201220142015012345
Abstract: (arXiv)
We derive the metric for a Bianchi Type I space-time with energy density that is dominated by that of a perfect fluid with equation of state p=wρp=w\rho and whose anisotropy is seeded by a fixed norm spacelike vector field. We solve for the evolution of perturbations about this space-time. In particular, we show that the Jeans instability in an expanding flat Friedmann-Robertson-Walker universe is modified by the presence of the vector field so that energy density perturbations develop direction-dependent growth.