Multi-messenger astronomy aims to combine the astrophysical observations from different messengers (light, gravitational waves, neutrinos and so on) to interpret the physical phenomena underlying a single event. In this framework, the binary neutron star mergers are perfect candidates for these studies, since they allow us to deepen our knowledge of gravitational interaction and to study the behavior of nuclear matter at extreme densities. An exemplary case is the gravitational-wave signal GW170817 and its electromagnetic counterparts, GRB170817 and AT2017gfo. This event represents a milestone for multi-messenger astronomy and analysis of these data has shed new light on these astrophysical events.
A recording of Matteo's talk can be found here.