Vainshtein mechanism in Generalised Massive Gravity

A. Emir Gümrük üoǧlu, Rampei Kimura, Michael Kenna-Allison, Kazuya Koyama

研究成果: Article査読

1 被引用数 (Scopus)

抄録

We present a non-linear analysis of perturbations around cosmological solutions in Generalised Massive gravity. This Lorentz invariant theory is an extension of de Rham, Gabadadze, Tolley massive gravity that propagates 5 degrees of freedom while allowing stable open FLRW cosmologies. For a minimal model that supports a self-accelerating background, we study the dynamics of non-linear perturbations. We find that the equation for the scalar graviton is distinct from the analogues in Horndeski and DHOST theories. We numerically solve the equation to find a new type of nonlinear solution for the scalar mode, and confirm the presence of a Vainshtein screening mechanism. We show that the PPN parameter approaches its GR value at solar system scales and satisfies the current bounds.

本文言語English
論文番号023
ジャーナルJournal of Cosmology and Astroparticle Physics
2021
9
DOI
出版ステータスPublished - 2021 9月
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学

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