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Bharat Ratra (Kansas State U.) "Dark Energy: Constant or Time Variable? (…and other open questions)""
May 12, 2016 @ 4:00 pm - 5:00 pm
Experiments and observations over the last two decades have persuaded cosmologists that (as yet undetected) dark energy is by far the main component of the energy budget of the universe. I review a few simple dark energy models and compare their predictions to observational data, to derive dark energy model-parameter constraints and to test consistency of different data sets. I conclude with a list of open cosmological questions.