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RESEARCH PRODUCT
New limits on Early Dark Energy from the South Pole Telescope
Zhen HouR. De PutterR. De PutterO. ZahnChristian L. Reichardtsubject
PhysicsCosmology and Nongalactic Astrophysics (astro-ph.CO)010308 nuclear & particles physicsmedia_common.quotation_subjectCosmic microwave backgroundCosmic background radiationAstrophysics::Instrumentation and Methods for AstrophysicsFOS: Physical sciencesAstronomy and AstrophysicsAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesCMB cold spotUniverseCosmologySouth Pole TelescopeSpace and Planetary Science0103 physical sciencesDark energyBaryon acoustic oscillations010303 astronomy & astrophysicsmedia_commonAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-10-24 |