Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2005-04-18
Phys.Rev. D71 (2005) 084026
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
20 pages, 3 figures, to be published in PRD; improved appendix, two references corrected; references corrected
Scientific paper
10.1103/PhysRevD.71.084026
The equations describing the adiabatic, small radial oscillations of general relativistic stars are generalized to include the effects of a cosmological constant. The generalized eigenvalue equation for the normal modes is used to study the changes in the stability of the homogeneous sphere induced by the presence of the cosmological constant. The variation of the critical adiabatic index as a function of the central pressure is studied numerically for different trial functions. The presence of a large cosmological constant significantly increases the value of the critical adiabatic index. The dynamical stability condition of the homogeneous star in the Schwarzschild-de Sitter geometry is obtained and several bounds on the maximum allowable value for a cosmological constant are derived from stability considerations.
Boehmer Christian G.
Harko Tiberiu
No associations
LandOfFree
Dynamical instability of fluid spheres in the presence of a cosmological constant 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 Dynamical instability of fluid spheres in the presence of a cosmological constant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamical instability of fluid spheres in the presence of a cosmological constant will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-137795