Multimessenger Signatures of Massive Black Holes in Dwarf Galaxies
  Recent discoveries of massive black holes (MBHs) in dwarf galaxies suggest
that they may have a more common presence than once thought. Systematic
searches are revealing more candidates, but this process could be accelerated
by predictions from simulations. We perform a study of several high-resolution,
cosmological, zoom-in simulations focusing on dwarf galaxies that host massive
black holes at z = 0, with the aim of determining when the black holes are most
observable. Larger dwarf galaxies are more likely to host MBHs than those of
lower mass. About 50% of the MBHs in dwarfs are not centrally located, but
rather are wandering within a few kpc of the galaxy center. The accretion
luminosities of MBHs in dwarfs are low throughout cosmic time, rendering them
extremely difficult to detect. However, the merger history of these MBHs is
optimal for gravitational wave detection by LISA.
