Video URL

https://pirsa.org/15090072

Dark Energy: constant or time variable? (... and other open questions)

Ratra, B. (2015). Dark Energy: constant or time variable? (... and other open questions). Perimeter Institute for Theoretical Physics. https://pirsa.org/15090072

Ratra, Bharat. Dark Energy: constant or time variable? (... and other open questions). Perimeter Institute for Theoretical Physics, Sep. 23, 2015, https://pirsa.org/15090072 

          @misc{ scivideos_PIRSA:15090072,
            doi = {10.48660/15090072},
            url = {https://pirsa.org/15090072},
            author = {Ratra, Bharat},
            keywords = {Cosmology},
            language = {en},
            title = {Dark Energy: constant or time variable? (... and other open questions)},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2015},
            month = {sep},
            note = {PIRSA:15090072 see, \url{https://scivideos.org/pirsa/15090072}}
          }

Bharat Ratra Kansas State University

DOI 10.48660/15090072
Source Repository PIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

Experiments and observations over the last decade and a half 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.