Sizes matters for black hole formation, but there's something missing in the middle ground
- Written by Holger Baumgardt, Associate Professor, The University of Queensland
An artist's impression of a supermassive black hole at the centre of a galaxy.NASA/JPL-Caltech
So far, all black holes discovered by astronomers fall into two broad categories: “stellar mass” black holes and “supermassive” black holes.
But what puzzles astronomers is why the two extremes – what about intermediate-sized...