Constraints on general second-order scalar-tensor models from gravitational Cherenkov radiation

Rampei Kimura*, Kazuhiro Yamamoto

*この研究の対応する著者

研究成果: Article査読

50 被引用数 (Scopus)

抄録

We demonstrate that the general second-order scalar-tensor theories, which have attracted attention as possible modified gravity models to explain the late time cosmic acceleration, could be strongly constrained from the argument of the gravitational Cherenkov radiation. To this end, we consider the purely kinetic coupled gravity and the extended galileon model on a cosmological background. In these models, the propagation speed of tensor mode could be less than the speed of light, which puts very strong constraints from the gravitational Cherenkov radiation.

本文言語English
論文番号50
ジャーナルJournal of Cosmology and Astroparticle Physics
2012
7
DOI
出版ステータスPublished - 2012 7月
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学

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