Quintessence and Gravitational Waves

Details Quintessence and Gravitational Waves Quintessence and Gravitational Waves

2000-04-12

arxiv.org/abs/astro-ph/0004156v2

Phys.Rev. D62 (2000) 083506

Astronomy and Astrophysics

Astrophysics

21 pages, 18 figures, fianl version, accepted for publication in PRD

Scientific paper

10.1103/PhysRevD.62.083506

We investigate some aspects of quintessence models with a non-minimally coupled scalar field and in particular we show that it can behave as a component of matter with $-3 \lesssim P/\rho \lesssim 0$. We study the properties of gravitational waves in this class of models and discuss their energy spectrum and the cosmic microwave background anisotropies they induce. We also show that gravitational waves are damped by the anisotropic stress of the radiation and that their energy spectrum may help to distinguish between inverse power law potential and supergravity motivated potential. We finish by a discussion on the constraints arising from their density parameter $\Omega_\GW$.

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