Supermassive black holes (SMBHs) are thought to exist at the nucleus of all galaxies in the Universe, according to cosmologists. The masses of these objects are usually roughly proportionate to the mass of the central galactic bulge that surrounds them, implying that the black hole’s evolution and that of its galaxy are related in some way.
SMBHs are thought to grow through the accretion of stars, gas, and dust, as well as mergers with other black holes, according to astronomers.However, cosmological durations differ significantly from human timelines, and the collision of two galaxies can take a very long period. This opens up a vast window for the merger to be interrupted, and the process might be delayed or even stopped entirely, leading to these black hole wanderers.
As a result, Romulus’ Milky Way-mass galaxies have an average of 12 Supermassive black holes, which typically traverse the halo far from the galactic center.We estimate that the number of wandering black holes scales roughly linearly with halo mass, implying that galaxy cluster halos will include a large number of wandering black holes.These black holes may or may not be active, making detection extremely challenging.