A late-time transition in the equation of state versus Lambda-CDM
B. A. Bassett, M. Kunz, J. Silk, C. Ungarelli
Abstract
We study a model of the dark energy which exhibits a rapid change in its equation of state w(z), such as occurs in vacuum metamorphosis. We compare the model predictions with CMB, large scale structure and supernova data and show that a late-time transition is marginally preferred over standard Lambda-CDM.
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