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)


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.

ジャーナルJournal of Cosmology and Astroparticle Physics
出版ステータスPublished - 2021 9月

ASJC Scopus subject areas

  • 天文学と天体物理学


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