Modified gravity inside astrophysical bodies

Ryo Saito, Daisuke Yamauchi, Shuntaro Mizuno, Jérôme Gleyzes, David Langlois

研究成果: Article

55 引用 (Scopus)

抄録

Many theories of modified gravity, including the well studied Horndeski models, are characterized by a screening mechanism that ensures that standard gravity is recovered near astrophysical bodies. In a recently introduced class of gravitational theories that goes beyond Horndeski, it has been found that new derivative interactions lead to a partial breaking of the Vainshtein screening mechanism inside any gravitational source, although not outside. We study the impact of this new type of deviation from standard gravity on the density profile of a spherically symmetric matter distribution, in the nonrelativistic limit. For simplicity, we consider a polytropic equation of state and derive the modifications to the standard Lane-Emden equations. We also show the existence of a universal upper bound on the amplitude of this type of modified gravity, independently of the details of the equation of state.

元の言語English
記事番号008
ジャーナルJournal of Cosmology and Astroparticle Physics
2015
発行部数6
DOI
出版物ステータスPublished - 2015 6 1

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astrophysics
gravitation
equations of state
screening
deviation
profiles
interactions

ASJC Scopus subject areas

  • Astronomy and Astrophysics

これを引用

Saito, R., Yamauchi, D., Mizuno, S., Gleyzes, J., & Langlois, D. (2015). Modified gravity inside astrophysical bodies. Journal of Cosmology and Astroparticle Physics, 2015(6), [008]. https://doi.org/10.1088/1475-7516/2015/06/008

Modified gravity inside astrophysical bodies. / Saito, Ryo; Yamauchi, Daisuke; Mizuno, Shuntaro; Gleyzes, Jérôme; Langlois, David.

:: Journal of Cosmology and Astroparticle Physics, 巻 2015, 番号 6, 008, 01.06.2015.

研究成果: Article

Saito, R, Yamauchi, D, Mizuno, S, Gleyzes, J & Langlois, D 2015, 'Modified gravity inside astrophysical bodies', Journal of Cosmology and Astroparticle Physics, 巻. 2015, 番号 6, 008. https://doi.org/10.1088/1475-7516/2015/06/008
Saito, Ryo ; Yamauchi, Daisuke ; Mizuno, Shuntaro ; Gleyzes, Jérôme ; Langlois, David. / Modified gravity inside astrophysical bodies. :: Journal of Cosmology and Astroparticle Physics. 2015 ; 巻 2015, 番号 6.
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