Dark energy and modified gravity

Shinji Tsujikawa

doi:10.1063/1.2981544

Dark energy and modified gravity

Shinji Tsujikawa^*

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	KEK Cosmophysics Group Inaugural Conference - Accelerators in the Universe - Interplay between High Energy Physics and Cosmophysics
Pages	18-22
Number of pages	5
DOIs	https://doi.org/10.1063/1.2981544
Publication status	Published - 2008
Externally published	Yes
Event	KEK Cosmophysics Group Inaugural Conference - Accelerators in the Universe, AIU 2008 - Tsukuba, Japan Duration: 2008 Mar 12 → 2008 Mar 14

Publication series

Name	AIP Conference Proceedings
Volume	1040
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	KEK Cosmophysics Group Inaugural Conference - Accelerators in the Universe, AIU 2008
Country/Territory	Japan
City	Tsukuba
Period	08/3/12 → 08/3/14

Keywords

Dark energy
F(R) gravity
Scalar-tensor theory

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.2981544

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. AIP Conference Proceedings, vol. 1040, pp. 18-22, KEK Cosmophysics Group Inaugural Conference - Accelerators in the Universe, AIU 2008, Tsukuba, Japan, 08/3/12. https://doi.org/10.1063/1.2981544

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author = "Shinji Tsujikawa",

year = "2008",

doi = "10.1063/1.2981544",

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AB - 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.

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KW - Scalar-tensor theory

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Dark energy and modified gravity

Abstract

Publication series

Conference

Keywords

ASJC Scopus subject areas

Access to Document

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