Cosmological Imprints of a Generalized Chaplygin Gas Model for the Early Universe

Abstract

We propose a phenomenological model for the early universe where there is a smooth transition between an early "quintessence" phase and a radiation dominated era. The matter content is modelled by an appropriately modified Chaplygin gas for the early universe. We constrain the model observationally by mapping the primordial power spectrum of the scalar perturbations to the latest data of WMAP7. We compute as well the spectrum of the primordial gravitational waves as would be measured today. We show that the high frequencies region of the spectrum depends on the free parameter of the model and most importantly this region of the spectrum can be within the reach of future gravitational waves detectors.

10 pages, 8 figures. RevTex4

References in corpus (8)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Linear and nonlinear interactions in the dark sector
• Lectures on inflation and cosmological perturbations
• Chaplygin inspired Inflation
• Stochastic gravitational waves from a new type of modified Chaplygin gas
• Relic gravitational waves: latest revisions and preparations for new data
• Parametric Resonance and Cosmological Gravitational Waves
• Gravitational wave generation in power-law inflationary models

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