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- W2044602023 startingPage "049" @default.
- W2044602023 abstract "We look for evidence for the evolution in dark energy density by employing Principal Component Analysis (PCA). Distance redshift data from supernovae and baryon acoustic oscillations (BAO) along with WMAP7 distance priors are used to put constraints on curvature parameter Omega_k and dark energy parameters. The data sets are consistent with a flat Universe. The constraints on the dark energy evolution parameters obtained from supernovae (including CMB distance priors) are consistent with a flat Lambda-CDM Universe. On the other hand, in the parameter estimates obtained from the addition of BAO data the second principal component, which characterize a non-constant contribution from dark energy, is non-zero at 1-sigma. This could be a systematic effect and future BAO data holds key to making more robust claims." @default.
- W2044602023 created "2016-06-24" @default.
- W2044602023 creator A5023978065 @default.
- W2044602023 creator A5049004002 @default.
- W2044602023 date "2013-02-27" @default.
- W2044602023 modified "2023-10-14" @default.
- W2044602023 title "Is dark energy evolving?" @default.
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- W2044602023 doi "https://doi.org/10.1088/1475-7516/2013/02/049" @default.
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