A conserved variable in the perturbed hydrodynamic world model

Details A conserved variable in the perturbed hydrodynamic world model A conserved variable in the perturbed hydrodynamic world model

1999-07-07

arxiv.org/abs/astro-ph/9907080v1

Phys.Rev. D60 (1999) 103512

Astronomy and Astrophysics

Astrophysics

4 pages, no figure, To appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.60.103512

We introduce a scalar-type perturbation variable $\Phi$ which is conserved in
the large-scale limit considering general sign of three-space curvature ($K$),
the cosmological constant ($\Lambda$), and time varying equation of state. In a
pressureless medium $\Phi$ is {\it exactly conserved} in all scales.

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