Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-11-10
Phys.Rev.D81:044008,2010
Physics
High Energy Physics
High Energy Physics - Theory
9 pages; minor corrections, order of sections changed, reference added (v2)
Scientific paper
10.1103/PhysRevD.81.044008
In Horava-Lifshitz gravity, regularity of a solution requires smoothness of not only the spacetime geometry but also the foliation. As a result, the regularity condition at the center of a star is more restrictive than in general relativity. Assuming that the energy density is a piecewise-continuous, non-negative function of the pressure and that the pressure at the center is positive, we prove that the momentum conservation law is incompatible with the regularity at the center for any spherically-symmetric, static configurations. The proof is totally insensitive to the structure of higher spatial curvature terms and, thus, holds for any values of the dynamical critical exponent $z$. Therefore, we conclude that a spherically-symmetric star should include a time-dependent region near the center. We also comment on the condition under which linear instability of the scalar graviton does not show up.
Izumi Keisuke
Mukohyama Shinji
No associations
LandOfFree
Stellar center is dynamical in Horava-Lifshitz gravity 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 Stellar center is dynamical in Horava-Lifshitz gravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stellar center is dynamical in Horava-Lifshitz gravity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-50844