Constraint on the radius of five-dimensional dS spacetime with GW170817 and GRB 170817A

Understand

The recent detections of the gravitational wave (GW) event GW170817 and its electromagnetic counterpart GRB 170817A produced by a binary neutron star (NS) merger is a new milestone of multimessenger astronomy.

• The time interval between these two signals has attracted widespread attention from physicists.
• In the braneworld scenario, GWs could propagate through the bulk while electromagnetic waves (EMWs) are bounded on the brane, i.e., our Universe.
• Therefore, the trajectories of GWs and EMWs may follow different pathes.