Document Type
Article
Publication Date
7-10-2003
Publication Title
The Astrophysical Journal
Department
Department of Physics and Astronomy
Abstract
We examine the cosmic microwave background (CMB) anisotropy for signatures of early quintessence dark energy—a nonnegligible quintessence energy density during the recombination and structure formation eras. Only very recently does the quintessence overtake the dark matter and push the expansion into overdrive. Because the presence of early quintessence exerts an 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/CMB/large-scale structure data set, is characteristic of early quintessence. We identify a set of concordant models and map out directions for further investigation of early quintessence.
DOI
10.1086/376975
Original Citation
Robert R. Caldwell et al 2003 ApJ 591 L75
Dartmouth Digital Commons Citation
Caldwell, Robert R.; Doran, Michael; Mller, Christian M.; Schfer, Gregor; and Wetterich, Christof, "Early Quintessence in Light of theWilkinson Microwave Anisotropy Probe" (2003). Dartmouth Scholarship. 2261.
https://digitalcommons.dartmouth.edu/facoa/2261
