181 citations · 846 across the 29 of their papers we have counts for
11 papers · 1 filter
Viable massive gravity without nonlinear screening
Yusuke Manita, Sirachak Panpanich, Rampei Kimura
We study nonlinear effects of perturbations around a cosmological background in projected massive gravity, which admits self-accelerating solutions in an open FLRW universe. Using…
Consistency of matter coupling in modified gravity
Kazufumi Takahashi, Rampei Kimura, Hayato Motohashi
Matter coupling in modified gravity theories is a nontrivial issue when the gravitational Lagrangian possesses a degeneracy structure to avoid the problem of the Ostrogradsky ghost…
Linear growth of structure in projected massive gravity
Yusuke Manita, Rampei Kimura
In the present paper, we investigate the linear growth of matter fluctuations based on a concrete model of the projected massive gravity, which is free of the Boulware-Deser ghost…
Stability of relativistic stars with scalar hairs
Ryotaro Kase, Rampei Kimura, Seiga Sato +1
We study the stability of relativistic stars in scalar-tensor theories with a nonminimal coupling of the form , where depends on a scalar field and is the Ricci…
Neutron star cooling in modified gravity theories
Akira Dohi, Ryotaro Kase, Rampei Kimura +2
We study thermal evolution of isolated neutron stars in scalar-tensor theories for the first time. Whether the rapid cooling due to the direct Urca process occurs or not is an inte…
Massive gravity with non-minimal coupling
A. Emir Gumrukcuoglu, Rampei Kimura, Kazuya Koyama
We propose new massive gravity theories with 5 dynamical degrees of freedom. We evade uniqueness theorems regarding the form of the kinetic and potential terms by adopting the "gen…