Intermediate black holes are a class of black holes that are more massive than stellar black holes (which are formed from the collapse of massive stars) but less massive than supermassive black holes (which are found at the centers of galaxies). They are thought to have masses ranging from hundreds to thousands of times that of the sun.
Intermediate black holes are thought to form through a variety of processes, such as the direct collapse of massive gas clouds, the merger of smaller black holes, or the runaway collisions of stars in dense star clusters.
Intermediate black holes are characterized by their mass, which places them in the intermediate range between stellar and supermassive black holes. They can also exhibit accretion disks, jets, and other phenomena commonly associated with black holes.
Intermediate black holes are challenging to detect due to their intermediate mass range. Some potential candidates have been identified through indirect methods such as the detection of gravitational waves from mergers involving intermediate black holes, and the observation of star clusters that may host these black holes.