71 citations · 293 across the 15 of their papers we have counts for
10 papers · 1 filter
Even-parity black hole perturbations in Minimal Theory of Bigravity
Masato Minamitsuji, Shinji Mukohyama, Michele Oliosi
We study even-parity black hole perturbations in Minimal Theory of Bigravity (MTBG). We consider the Schwarzschild solution written in the spatially-flat coordinates in the self-ac…
Minimally modified gravity with auxiliary constraints formalism
Zhi-Bang Yao, Michele Oliosi, Xian Gao +1
We investigate the possibility of reducing the number of degrees of freedom (d.o.f.) starting from generic metric theories of gravity by introducing multiple auxiliary constraints…
Gravitational collapse and odd-parity black hole perturbations in Minimal Theory of Bigravity
Masato Minamitsuji, Antonio De Felice, Shinji Mukohyama +1
In the former part, we study the gravitational collapse of pressureless dust and find special solutions, where, in both the physical and fiducial sectors, the exterior and interior…
Static and spherically symmetric general relativity solutions in Minimal Theory of Bigravity
Masato Minamitsuji, Antonio De Felice, Shinji Mukohyama +1
We investigate static and spherically symmetric solutions in the Minimal Theory of Bigravity (MTBG). First, we show that a pair of Schwarzschild-de Sitter spacetimes with different…
Minimal Theory of Bigravity: construction and cosmology
Antonio De Felice, François Larrouturou, Shinji Mukohyama +1
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 propagate…
Minimally modified gravity with an auxiliary constraint: a Hamiltonian construction
Zhi-Bang Yao, Michele Oliosi, Xian Gao +1
Working directly with a general Hamiltonian for the spacetime metric with the decomposition and keeping only the spatial covariance, we investigate the possibility of reducin…
Constant roll and primordial black holes
Hayato Motohashi, Shinji Mukohyama, Michele Oliosi
The constant-roll inflation with small positive value of the constant-roll parameter has been known to produce a slightly red-tilted cu…
On the absence of conformally flat slicings of the Kerr spacetime
Antonio de Felice, François Larrouturou, Shinji Mukohyama +1
This work investigates the possibility of achieving a conformally flat slicing of the Kerr spacetime. We consider a hypersurface of the form , where are t…
Phenomenology in type-I minimally modified gravity
Katsuki Aoki, Antonio De Felice, Chunshan Lin +2
We study cosmology in a class of minimally modified gravity (MMG) with two local gravitational degrees of freedom. We classify modified gravity theories into type-I and type-II: th…
Black holes and stars in the minimal theory of massive gravity
Antonio De Felice, François Larrouturou, Shinji Mukohyama +1
In this letter, we show that any solution of general relativity (GR) that can be rendered spatially flat by a coordinate change is also a solution of the self-accelerating branch o…