A phantom does not result from a backreaction

Hisako Tanaka, Toshifumi Futamase

研究成果: Article査読

11 被引用数 (Scopus)

抄録

The backreaction of nonlinear inhomogeneities to the cosmic expansion is analyzed in the framework of general relativity with a cosmological constant. By defining the spatially averaged matter energy density, we find that the cosmological constant induces a new type of backreaction whose equation of state is p = -4/3ρ, where ρ and p are the effective energy density and effective pressure of the backreaction in the averaged Friedmann universe. However, the effective density is negative, and thus it decreases the acceleration caused by the cosmological constant.

本文言語English
ページ(範囲)183-188
ページ数6
ジャーナルProgress of Theoretical Physics
117
1
DOI
出版ステータスPublished - 2007 1

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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