Early Quintessence and the CMB

Details Early Quintessence and the CMB Early Quintessence and the CMB

2003-10-15

arxiv.org/abs/astro-ph/0310412v1

Astronomy and Astrophysics

Astrophysics

Parallel talk given at the XVieme Rencontres de Blois, June 2003 4 pages, 1 figure

Scientific paper

We examine the cosmic microwave background (CMB) anisotropy for signatures of early quintessence dark energy -- a non-negligible quintessence energy density during the recombination and structure formation eras. In contrast to a $\Lambda$CDM cosmology, early quintessence leads to a larger suppression of structure growth. Because of this influence on the clustering of dark matter and the baryon-photon fluid, we may expect to find trace signals in the CMB and the mass fluctuation power spectrum. In detail, we demonstrate that suppressed clustering power on small length-scales, as suggested by the combined Wilkinson Microwave Anisotropy Probe (WMAP) / CMB / large scale structure data set, is characteristic of early quintessence.

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