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Similar

A. De Felice, A. Doll, F. Larrouturou, and S. Mukohyama, Black holes in a type-II minimally modified gravity (2020), arXiv:2010.13067 [gr-qc]
Original
2010
Cited alongside, same era.
C. de Rham, G. Gabadadze, and A. J. Tolley, Resummation of massive gravity, Physical Review Letters 106
Original
2011
Cited alongside, same era.
R. Hagala, A. D. Felice, D. F. Mota, and S. Mukohyama, Nonlinear dynamics of the minimal theory of massive gravity (2020), arXiv:2011.14697 [astro-ph.CO]
Original
2011
Cited alongside, same era.
Z.-B. Yao, M. Oliosi, X. Gao, and S. Mukohyama, Minimally modified gravity with an auxiliary constraint: a Hamiltonian construction (2020), arXiv:2011.00805 [gr-qc]
Original
2011
Cited alongside, same era.
A. D. Felice and S. Mukohyama, Weakening gravity for dark matter in a type-II minimally modified gravity (2020), arXiv:2011.04188 [astro-ph.CO]

Then

R. Kimura, T. Tanaka, K. Yamamoto, and Y. Yamashita, Constraint on ghost-free bigravity from gravitational Cherenkov radiation, Phys. Rev. D 94
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2016
Later among the works it cites.
K. Aoki and S. Mukohyama, Massive gravitons as dark matter and gravitational waves, Phys. Rev. D 94
Original
2016
Later among the works it cites.
B. Abbott, R. Abbott, T. Abbott, F. Acernese, K. Ackley, C. Adams, T. Adams, P. Addesso, R. Adhikari, V. Adya, and et al., Gw170814: A three-detector observation of gravitational waves from a binary black hole coalescence, Physical Review Letters 119
Original
2017
Later among the works it cites.
A. De Felice and S. Mukohyama, Graviton mass might reduce tension between early and late time cosmological data, Phys. Rev. Lett. 118
Original
2017
Later among the works it cites.

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2020

Minimal Theory of Bigravity: construction and cosmology

De Felice, Antonio, Larrouturou, François, Mukohyama, Shinji et al.

Understand

Following the path of minimalism in alternative theories of gravity, we construct the "Minimal Theory of Bigravity" (MTBG), a theory of two interacting spin-2 fields that propagates only four local degrees of freedom instead of the usual seven ones and that allows for the same homogeneous and isotropic cosmological solutions as in Hassan-Rosen bigravity (HRBG).

Starting from a precursor theory that propagates six local degrees of freedom, we carefully choose additional constraints to eliminate two of them to construct the theory.
Investigating the cosmology of MTBG, we find that it accommodates two different branches of homogeneous and isotropic background solutions, equivalent on-shell to the two branches that are present in HRBG.
Those branches in MTBG differ however from the HRBG ones at the perturbative level, are both perfectly healthy and do not exhibit strong coupling issues nor ghost instabilities.