A review of the stochastic background of gravitational waves in f(R) gravity with WMAP constrains

Details A review of the stochastic background of gravitational waves in f(R) gravity with WMAP constrains A review of the stochastic background of gravitational waves in f(R) gravity with WMAP constrains

2009-01-09

arxiv.org/abs/0901.1193v2

Open Astron.J.2:71-79,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Review commissioned by The Open Astronomy Journal, final version accepted for publication

Scientific paper

10.2174/1874381101004010075

This paper is a review of previous works on the stochastic background of gravitational waves (SBGWs) which has been discussed in various peer-reviewed journals and international conferences. The SBGWs is analyzed with the aid of the Wilkinson Microwave Anisotropy Probe (WMAP) data. We emphasize that, in general, in previous works in the literature about the SBGWs, old Cosmic Background Explorer (COBE) data were used. After this, we want to face the problem of how the SBGWs and f(R) gravity (where f(R) is a function of the Ricci scalar R) can be related, showing, vice versa, that a revealed SBGWs could be a powerful probe for a given theory of gravity. In this way, it will also be shown that the conform treatment of SBGWs can be used to parametrize in a natural way f(R) theories. Some interesting examples which have been recently discussed in the literature will be also analysed. The presence and the potential detection of the SBGWs is quite important in the framework of the debate on high-frequency gravitational waves (HFGWs) too. Recently, the importance of HFGWs has been emphasized in some papers in the literature.

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