Neutron stars in generalized f(R) gravity

Details Neutron stars in generalized f(R) gravity Neutron stars in generalized f(R) gravity

2011-04-12

arxiv.org/abs/1104.2140v4

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Keywords: stars, neutron stars; gravity; modified gravity Accepted in Astrophysics and Space Science

Scientific paper

Quartic gravity theory is considered with the Einstein-Hilbert Lagrangean $R+aR^{2}+bR_{\mu \nu}R^{\mu \nu},$ $R_{\mu \nu}$ being Ricci\'s tensor and R the curvature scalar. The parameters $a$ and $b$ are taken of order 1 km$^{2}.$ Arguments are given which suggest that the effective theory so obtained may be a plausible approximation of a viable theory. A numerical integration is performed of the field equations for a free neutron gas. As in the standard Oppenheimer-Volkoff calculation the star mass increases with increasing central density until about 1 solar mass and then decreases. However a dramatic difference exists in the behaviour of the baryon number, which increases monotonically. The calculation suggests that the theory allows stars in equilibrium with arbitrary baryon number, no matter how large.

Affiliated with

Also associated with

No associations

Rating

Neutron stars in generalized f(R) 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 Neutron stars in generalized f(R) gravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neutron stars in generalized f(R) gravity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-730983