PIRSA:07040011 Scientific Series Cosmology

DOI10.48660/07040011

Series: Colloquium

(2007). Challenges of Explaining Cosmic Acceleration Through Modified Gravity. Perimeter Institute. https://pirsa.org/07040011

Challenges of Explaining Cosmic Acceleration Through Modified Gravity. Perimeter Institute, Apr. 25, 2007, https://pirsa.org/07040011 

@misc{ pirsa_PIRSA:07040011,
  doi = {10.48660/07040011},
  url = {https://pirsa.org/07040011},
  author = {},
  keywords = {Cosmology},
  language = {en},
  title = {Challenges of Explaining Cosmic Acceleration Through Modified Gravity},
  publisher = {Perimeter Institute},
  year = {2007},
  month = {apr},
  note = {PIRSA:07040011 see, \url{https://pirsa.org}}
}

Abstract

Among the possible explanations for the observed acceleration of the universe, perhaps the boldest is the idea that new gravitational physics might be the culprit. In this colloquium I will discuss some of the challenges of constructing a sensible phenomenological extension of General Relativity, give examples of some candidate models of modified gravity and survey existing observational constraints on this approach. I will conclude by discussing how we might hope to distinguish between modifications of General Relativity and dark energy as competing hypotheses to explain cosmic acceleration.

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