There are three identified sorts of black holes: supermassive black holes that lurk within the hearts of galaxies, stellar mass black holes fashioned from stars that die as supernovae, and intermediate mass black holes with lots between the 2 extremes. It is usually thought that the intermediate ones kind from the mergers of stellar mass black holes. If that’s true, there must be a forbidden vary between stellar and intermediate lots. A spread the place the mass is simply too giant to have fashioned from a star however too small to be the sum of mergers. However a brand new examine of knowledge from LIGO means that there are black holes in that forbidden vary.
