Searching for isolated black holes in the Milky Way

Abstract

If Primordial Black Holes constitute a significant component of the Dark Matter, we expect a fraction of the population to be present at the center of our Galaxy. This region is rich in dense molecular clouds. Black holes located within a cloud will accrete the dense interstellar gas, which will emit radiation during the process, providing a possible channel for detection. Here we discuss the scenario in which the Primordial Black Holes masses follow a multimodal mass function, as motivated by the thermal history of the universe, and compare it to the monochromatic case.