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

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

2005-12-29

arxiv.org/abs/astro-ph/0512641v2

Phys.Rev.D73:023512,2006

Astronomy and Astrophysics

Astrophysics

6 pages,6 figures. One reference added, minor changes to match version published in Physical Review D

Scientific paper

10.1103/PhysRevD.73.023512

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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