Robert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.
Researchers have discovered that elusive intermediate-mass black holes could form in dense star clusters containing anywhere between tens of thousands to millions of tightly packed stars called"from subsequent mergers of larger and larger black holes. Yet a star massive enough to die and create a black hole with thousands of solar masses should be incredibly rare and should struggle to retain that mass when it"dies.
To discover if a massive star could"survive" with enough mass to birth an intermediate-mass black hole, Fujii and team simulated a globular cluster as it formed. "We, for the first time, successfully performed numerical simulations of globular cluster formation, modeling individual stars," Fujii said."By resolving individual stars with a realistic mass for each, we could reconstruct the collisions of stars in a tightly packed environment.
The team also found the simulation predicted a mass ratio between the intermediate-mass black hole and the globular cluster within which it is formed. That ratio, as it turned out, matches actual astronomical observations.by resolving individual stars," Fujii explained."It is still difficult to simulate Milky Way-size galaxies by resolving individual stars using currently available supercomputers.
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