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.
Two supermassive black holes found in collision-created"fossil galaxies" are so massive that they refuse to collide and merge. The discovery could explain why, although supermassive black hole mergers are predicted theoretically, they have never been observed in progress. , making this the most massive black hole binary ever seen. Not only that, but the binary components of this system are the closest in a supermassive black hole pair, separated by just 24 light-years.
The galaxy NGC 7727 shows what a galaxy looks like after a billions of year of the merging of galaxiesIn order to better understand this system of black hole heavyweights, the team turned to archival data harvested by Gemini North's Gemini Multi-Object Spectrograph . This lets them determine the speed of the stars within the vicinity of the two supermassive black holes and, in turn, the total mass of those black holes.
The team's results give important context regarding the formation of supermassive black hole binaries after galactic mergers but also support the idea that the mass of such binaries is integral in stalling black holes from following suit.
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