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Analytic Results for a Flat Universe Dominated by Dust and Dark Energy

A. Gruppuso·F. Finelli
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Abstract

We find the solution for the scale factor in a flat Universe driven by dust plus a component characterized by a constant parameter of state which dominates in the asymptotic future. We also present an analytic formula (in terms of hypergeometric functions) for the past light cone in such a universe. As applications of this result, we give analytic expressions for the Luminosity Distance and for the Acoustic Scale, where the latter determines the peaks positions in the pattern of CMB anisotropies.

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A. Gruppuso, F. Finelli. 2006-01-20. Analytic Results for a Flat Universe Dominated by Dust and Dark Energy. https://doi.org/10.1103/physrevd.73.023512

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