Dark energy and modified gravity

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The current accelerated expansion of the Universe may originate from some modification of gravitational theories. We derive the conditions under which f(R) DE models are cosmologically viable, where f(R) is a function of the Ricci scalar R. We study the evolution of the equation of state of DE, matter perturbations and local gravity constraints in such models and discuss methods to distinguish modified gravity models from the ACDM cosmology.

Original languageEnglish
Title of host publicationKEK Cosmophysics Group Inaugural Conference - Accelerators in the Universe - Interplay between High Energy Physics and Cosmophysics
Pages18-22
Number of pages5
DOIs
Publication statusPublished - 2008
Externally publishedYes
EventKEK Cosmophysics Group Inaugural Conference - Accelerators in the Universe, AIU 2008 - Tsukuba, Japan
Duration: 2008 Mar 122008 Mar 14

Publication series

NameAIP Conference Proceedings
Volume1040
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceKEK Cosmophysics Group Inaugural Conference - Accelerators in the Universe, AIU 2008
CountryJapan
CityTsukuba
Period08/3/1208/3/14

Keywords

  • Dark energy
  • F(R) gravity
  • Scalar-tensor theory

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Tsujikawa, S. (2008). Dark energy and modified gravity. In KEK Cosmophysics Group Inaugural Conference - Accelerators in the Universe - Interplay between High Energy Physics and Cosmophysics (pp. 18-22). (AIP Conference Proceedings; Vol. 1040). https://doi.org/10.1063/1.2981544