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.
| 元の言語 | English |
|---|---|
| 記事番号 | 50 |
| ジャーナル | Journal of Cosmology and Astroparticle Physics |
| 巻 | 2012 |
| 発行部数 | 7 |
| DOI | |
| 出版物ステータス | Published - 2012 7 1 |
| 外部発表 | Yes |
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ASJC Scopus subject areas
- Astronomy and Astrophysics
これを引用
Constraints on general second-order scalar-tensor models from gravitational Cherenkov radiation. / Kimura, Rampei; Yamamoto, Kazuhiro.
：: Journal of Cosmology and Astroparticle Physics, 巻 2012, 番号 7, 50, 01.07.2012.研究成果: Article
}
TY - JOUR
T1 - Constraints on general second-order scalar-tensor models from gravitational Cherenkov radiation
AU - Kimura, Rampei
AU - Yamamoto, Kazuhiro
PY - 2012/7/1
Y1 - 2012/7/1
N2 - 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.
AB - 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.
KW - cosmological perturbation theory
KW - gravitational waves / theory
KW - Modified gravity
UR - http://www.scopus.com/inward/record.url?scp=84864471899&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84864471899&partnerID=8YFLogxK
U2 - 10.1088/1475-7516/2012/07/050
DO - 10.1088/1475-7516/2012/07/050
M3 - Article
AN - SCOPUS:84864471899
VL - 2012
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
SN - 1475-7516
IS - 7
M1 - 50
ER -