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

Rampei Kimura, Kazuhiro Yamamoto

研究成果: Contribution to journalArticle査読

47 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.

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

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics

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