New limits on Early Dark Energy from the South Pole Telescope

We present new limits on early dark energy (EDE) from the cosmic microwave background (CMB) using data from the WMAP satellite on large angular scales and South Pole Telescope (SPT) on small angular scales. We find a strong upper limit on the EDE density of Omega_e < 0.018 at 95% confidence, a fa...

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Bibliographic Details
Main Authors: Reichardt, Christian L., de Putter, Roland, Zahn, Oliver, Hou, Zhen
Format: Text
Language:unknown
Published: arXiv 2011
Subjects:
Cosmology and Nongalactic Astrophysics astro-ph.CO
FOS Physical sciences
South Pole
South pole
Online Access:https://dx.doi.org/10.48550/arxiv.1110.5328
https://arxiv.org/abs/1110.5328
Description
Summary:We present new limits on early dark energy (EDE) from the cosmic microwave background (CMB) using data from the WMAP satellite on large angular scales and South Pole Telescope (SPT) on small angular scales. We find a strong upper limit on the EDE density of Omega_e < 0.018 at 95% confidence, a factor of three improvement over WMAP data alone. We show that adding lower-redshift probes of the expansion rate to the CMB data improves constraints on the dark energy equation of state, but not the EDE density. We also explain how the small-scale CMB temperature anisotropy constrains EDE. : 7 pages, 3 figures. ApJL (updated to accepted version)

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