Neutron star merger GW170817 strongly constrains doubly-coupled bigravity

@inproceedings{Akrami2018NeutronSM,
  title={Neutron star merger GW170817 strongly constrains doubly-coupled bigravity},
  author={Yashar Akrami and Philippe Brax and A. Davis and Valeri Vardanyan},
  year={2018}
}
We study the implications of the recent detection of gravitational waves emitted by a pair of merging neutron stars and their electromagnetic counterpart, events GW170817 and GRB170817A, on the viability of the doubly coupled bimetric models of cosmic evolution, where the two metrics couple directly to matter through a composite, effective metric. We demonstrate that the bounds on the speed of gravitational waves place strong constraints on the doubly coupled models, forcing either the two… CONTINUE READING
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