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Observational constraints on bimetric gravity
Marcus Högås, Edvard Mörtsell
Ghost-free bimetric gravity is a theory of two interacting spin-2 fields, one massless and one massive, in addition to the standard matter particles and fields, thereby generalizin…
Analytical constraints on bimetric gravity
Marcus Högås, Edvard Mörtsell
Ghost-free bimetric gravity is an extension of general relativity, featuring a massive spin-2 field coupled to gravity. We parameterize the theory with a set of observables having…
Generalized Vaidya solutions in bimetric gravity
Marcus Högås, Mikica Kocic, Francesco Torsello +1
In general relativity, the endpoint of spherically symmetric gravitational collapse is a Schwarzschild--[(A)dS] black hole. In bimetric gravity, it has been speculated that a stati…
Covariant BSSN formulation in bimetric relativity
Francesco Torsello, Mikica Kocic, Marcus Högås +1
Numerical integration of the field equations in bimetric relativity is necessary to obtain solutions describing realistic systems. Thus, it is crucial to recast the equations as a…
Spacetime symmetries and topology in bimetric relativity
Francesco Torsello, Mikica Kocic, Marcus Högås +1
We explore spacetime symmetries and topologies of the two metric sectors in Hassan-Rosen bimetric theory. We show that, in vacuum, the two sectors can either share or have separate…