Supermassive Black Holes (SMBHs) thrive at the centres of massive galaxies and galaxy mergers can lead to SMBH binaries with orbital periods of years. Such systems emit nano-hertz gravitational waves (GWs) which can be detected by employing networks of precisely timed milli-second pulsars. The rapidly maturing Pulsar Timing Arrays like NANOGrav, EPTA, InPTA, CPTA and PPTA, are...
The 2017 detection of the binary neutron star (BNS) merger event in both gravitational wave (GW) and electromagnetic wave (EM), GW170817, has shown the great potential for multi-messenger astronomy, allowing us to understand the link between neutron star mergers and gamma-ray bursts, physical mechanisms and environments of the EM counterpart, kilonova (KN), and cosmology with GW sources. Yet,...
