The effect of modified gravity on weak lensing

Material type: 文書・図像類

Author: TSUJIKAWA, Shinjiほか

Publisher: North-Holland

Publication date: 2008-06

Material Format: Digital

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Note (General)：: We study the effect of modified gravity on weak lensing in a class of scalar-tensor theory that includes f(R) gravity as a special case. These models ...

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Material Type: 文書・図像類
Title: The effect of modified gravity on weak lensing
Author/Editor: TSUJIKAWA, Shinji
TATEKAWA, Takayuki
Author Heading: TSUJIKAWA, Shinji
TATEKAWA, Takayuki
Publication, Distribution, etc.: North-Holland
Publication Date: 2008-06
Publication Date (W3CDTF): 2008-06
Periodical title: Physics letters. Sect. B
No. or year of volume/issue: 665
Volume: 665
Pages: 325-331
Text Language Code: eng
Target Audience: 一般
Note (General): We study the effect of modified gravity on weak lensing in a class of scalar-tensor theory that includes f(R) gravity as a special case. These models are designed to satisfy local gravity constraints by having a large scalar-field mass in a region of high curvature. Matter density perturbations in these models are enhanced at small redshifts because of the presence of a coupling Q that charac- terizes the strength between dark energy and non-relativistic matter. We compute a convergence power spectrum of weak lensing numerically and show that the spectral index and the amplitude of the spectrum in the linear regime can be significantly modified compared to the CDM model for large values of |Q| of the order of unity. Thus weak lensing provides a powerful tool to constrain such large coupling scalar-tensor models including f(R) gravity.
Access Restrictions: 限定公開
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 福井大学 : 福井大学学術機関リポジトリ