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

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

2008-05-08

arxiv.org/abs/0805.1078v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, two column; references and new section on observational limits added, typos corrected and clarifications made in tex

Scientific paper

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 $p=w\rho$ 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, 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. We also briefly consider observational limits on the vector field vacuum expectation value, $m$. We find that, if $m$ is constant during recombination and thereafter, $m \lesssim 10^{14} GeV$.

Affiliated with

Also associated with

No associations

Rating

Direction-dependent Jeans instability in an anisotropic Bianchi type I space-time does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Direction-dependent Jeans instability in an anisotropic Bianchi type I space-time, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direction-dependent Jeans instability in an anisotropic Bianchi type I space-time will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-52231