| Narrowing Constraints with Type Ia Supernovae: Converging on a Cosmological Constant (2007) | |||||||||
Abstract | |||||||||
| We apply a parameterization-independent approach to fitting the dark energy equation-of-state (EOS). Utilizing the latest type Ia supernova data, combined with results from the cosmic microwave background and baryon acoustic oscillations, we find that the dark energy is consistent with a cosmological constant. We establish independent estimates of the evolution of the dark energy EOS by diagonalizing the covariance matrix. We find three independent constraints, which taken together imply that the equation of state is more negative than -0.2 at the 68% confidence level in the redshift range 0. Comment: 16 pages, 6 figures, submitted to JCAP; A code to estimate binned & uncorrelated w(z) estimates from the supernovae Hubble diagram and most other cosmological data available from http://www.cooray.org/sn.html | |||||||||
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