Relic gravitational waves and the cosmic accelerated expansion

Details Relic gravitational waves and the cosmic accelerated expansion Relic gravitational waves and the cosmic accelerated expansion

2006-01-10

arxiv.org/abs/gr-qc/0601037v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, 2 figures. Uses AIP style. To be published in the AIP Proceedings of the XXVIII Spanish Relativity Meeting

Scientific paper

10.1063/1.2218213

The possibility of reconstructing the whole history of the scale factor of the Universe from the power spectrum of relic gravitational waves (RGWs) makes the study of these waves quite interesting. First, we explore the impact of a hypothetical era -right after reheating- dominated by mini black holes and radiation that may lower the spectrum several orders of magnitude. Next, we calculate the power spectrum of the RGWs taking into account the present stage of accelerated expansion and an hypothetical second dust era. Finally, we study the generalized second law of gravitational thermodynamics applied to the present era of accelerated expansion of the Universe.

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