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

Rampei Kimura, Kazuhiro Yamamoto

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number50
JournalJournal of Cosmology and Astroparticle Physics
Volume2012
Issue number7
DOIs
Publication statusPublished - Jul 1 2012
Externally publishedYes

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gravitational waves
tensors
scalars
gravitation
propagation
kinetics

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics

Cite this

Constraints on general second-order scalar-tensor models from gravitational Cherenkov radiation. / Kimura, Rampei; Yamamoto, Kazuhiro.

In: Journal of Cosmology and Astroparticle Physics, Vol. 2012, No. 7, 50, 01.07.2012.

Research output: Contribution to journalArticle

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