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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…
Note on bimetric causal diagrams
Mikica Kocic
A new kind of diagrams is presented, showing the causal structure of bimetric interactions.
Spherical dust collapse in bimetric relativity: Bimetric polytropes
Mikica Kocic, Francesco Torsello, Marcus Högås +1
We present a method for solving the constraint equations in the Hassan-Rosen bimetric theory to determine the initial data for the gravitational collapse of spherically symmetric d…
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…
On the ratio of lapses in bimetric relativity
Mikica Kocic, Anders Lundkvist, Francesco Torsello
The two lapse functions in the Hassan-Rosen bimetric theory are not independent. Without knowing the relation between them, one cannot evolve the equations in the 3+1 formalism. Th…
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…