Why are Supermassive Black Holes at Galactic Cores Spinning Faster than Ever in the History of the Universe?

Why are Supermassive Black Holes at Galactic Cores Spinning Faster than Ever in the History of the Universe?

British astronomers have found that the giant black holes in the centers of galaxies are on average spinning faster than at any time in the history of the Universe. Dr Alejo Martinez-Sansigre of the University of Portsmouth and Prof. Steve Rawlings of the University of Oxford made the new discovery by using radio, optical and X-ray data. They publish their findings in the journal Monthly Notices of the Royal Astronomical Society.

There is strong evidence that every galaxy has a massive black hole in its centers that have masses of between a million and a billion Suns. They cannot be seen directly, but material swirls around the black hole in a so-called accretion disk before its final demise. That material can become very hot and emit radiation including X-rays that can be detected by space-based telescopes whilst associated radio emission can be detected by telescopes on the ground.