Journal
PHYSICAL REVIEW LETTERS
Volume 109, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.171301
Keywords
-
Categories
Funding
- STFC [ST/H002774/1]
- NSERC
- NSFC
- Science and Technology Facilities Council [ST/I001204/1, ST/H002774/1] Funding Source: researchfish
- STFC [ST/H002774/1, ST/I001204/1] Funding Source: UKRI
Ask authors/readers for more resources
We apply a new nonparametric Bayesian method for reconstructing the evolution history of the equation of state w of dark energy, based on applying a correlated prior for w(z), to a collection of cosmological data. We combine the latest supernova (SNLS 3 year or Union 2.1), cosmic microwave background, redshift space distortion, and the baryonic acoustic oscillation measurements (including BOSS, WiggleZ, and 6dF) and find that the cosmological constant appears consistent with current data, but that a dynamical dark energy model which evolves from w < -1 at z similar to 0.25 to w > -1 at higher redshift is mildly favored. Estimates of the Bayesian evidence show little preference between the cosmological constant model and the dynamical model for a range of correlated prior choices. Looking towards future data, we find that the best fit models for current data could be well distinguished from the Lambda CDM model by observations such as Planck and Euclid-like surveys.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available