An international consortium of astronomers, including staff from the Max Planck Institute for Astronomy, has successfully unraveled the intricate formation mechanisms of the elusive intermediate-mass black holes. They could represent the link between their smaller relatives, the stellar black holes, and the supermassive giants that populate the centers of galaxies.
The quest to locate and understand the origins of intermediate-mass black holes remains an ongoing enigma. If they exist, they may serve as the connecting link between two extremes of black holes. At the low-mass end, we observe stellar black holes, remnants of supernova explosions of massive stars at the end of their lifetime.
To overcome this disadvantage, an international team led by Arca Sedda and including Albrecht Kamlah of the Max Planck Institute for Astronomy in Heidelberg, Germany have undertaken an innovative series of high-resolution numerical simulations of stellar clusters, known as the DRAGON-IIdatabase. In this endeavor, the astronomers uncovered a potential pathway for the formation of black holes of intermediate mass within young, densely populated, and massive star clusters.
By tracking the subsequent fate of an intermediate-mass black hole in these simulations, the astronomers identified a turbulent period marked by vigorous interactions with other stars and stellar black holes, which can lead to its rapid expulsion from its parental cluster, typically within a few hundred million years.
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