Hunting A Wandering Supermassive Black Hole in M31 Halo -- Hermitage of Black Hole

Understand

In the hierarchical structure formation scenario, galaxies enlarge through multiple merging events with less massive galaxies.

• In addition, the Magorrian relation indicates that almost all galaxies are occupied by a central supermassive black hole (SMBH) of mass $10^{-3}$ of its spheroidal component.
• Consequently, SMBHs are expected to wander in the halos of their host galaxies following a galaxy collision, although evidence of this activity is currently lacking.
• We investigate a current plausible location of an SMBH wandering in the halo of the Andromeda galaxy (M31).