A decoupled system of hyperbolic equations for linearized cosmological perturbations

Details A decoupled system of hyperbolic equations for linearized cosmological perturbations A decoupled system of hyperbolic equations for linearized cosmological perturbations

2001-10-15

arxiv.org/abs/gr-qc/0110071v2

Phys.Lett. B532 (2002) 1-7

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages, no figures, content enlarged

Scientific paper

10.1016/S0370-2693(02)01471-5

A decoupled system of hyperbolic partial differential equations for linear perturbations around any spatially flat FRW universe is obtained for a wide class of perturbations. The considered perturbing energy momentum-tensors can be expressed as the sum of the perturbation of a minimally coupled scalar field plus an arbitrary (weak) energy-momentum tensor which is covariantly conserved with respect to the background. The key ingredient in obtaining the decoupling of the equations is the introduction of a new covariant gauge which plays a similar role as harmonic gauge does for perturbations around Minkowski space-time. The case of universes satysfying a linear equation of state is discussed in particular, and closed analytic expressions for the retarded Green's functions solving the de Sitter, dust and radiation dominated cases are given.

Affiliated with

Also associated with

No associations

Rating

A decoupled system of hyperbolic equations for linearized cosmological perturbations 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 A decoupled system of hyperbolic equations for linearized cosmological perturbations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A decoupled system of hyperbolic equations for linearized cosmological perturbations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-621764