Speaker
Mr
Marcus Högås
(The Oskar Klein Centre, Department of Physics, Stockholm University)
Description
Bimetric gravity is a ghost-free extension of general relativity, exhibiting both a massless and a massive graviton. We show how the theory can be parameterized with five observables with specific physical interpretations and then constrain the parameter space by requiring: (i) observationally viable cosmology, (ii) a working screening mechanism that restores general relativity locally, and (iii) viable propagation of gravitational waves. Interestingly, the theory provides a good fit to data even away from any general relativity limit.
Primary author
Mr
Marcus Högås
(The Oskar Klein Centre, Department of Physics, Stockholm University)
Co-authors
Mr
Francesco Torsello
(The Oskar Klein Centre, Department of Physics, Stockholm University)
Prof.
Edvard Mörtsell
(The Oskar Klein Centre, Department of Physics, Stockholm University)
