Modeling Background Radiation in Isotropic Cosmologies

Details Modeling Background Radiation in Isotropic Cosmologies Modeling Background Radiation in Isotropic Cosmologies

2011-01-15

arxiv.org/abs/1101.2991v1

Gen.Rel.Grav.43:1625-1638,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages, Latex file, accepted for publication in General Relativity and Gravitation

Scientific paper

10.1007/s10714-011-1144-3

Using explicit perturbations of isotropic cosmological models which describe simple gravitational waves, an isotropic tensor having the algebraic symmetries of the Bel-Robinson tensor is derived as a model of cosmic background gravitational radiation and this is used to provide an answer to the question: in what sense can an energy-momentum-stress tensor similar to that describing the cosmic microwave background radiation (neglecting anisotropies) be associated with an isotropic background of gravitational radiation?

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