Chasing supermassive black hole merging events with<i>Athena</i>and<i>LISA</i>
Chasing supermassive black hole merging events with<i>Athena</i>and<i>LISA</i>
The European Space Agency is studying two large-class missions bound to operate in the decade of the 30s, and aiming at investigating the most energetic and violent phenomena in the Universe. $Athena$ is poised to study the physical conditions of baryons locked in large-scale structures from the epoch of their …