Black holes, which are not able to emit light, called lightning.
At Caltech the first time in history noticed a rare cosmic phenomenon, reports the Chronicle.info with reference to the Correspondent.
Astronomers have recorded the gravitational waves arising as a result of the merger of two black holes. The event was designated as S190521g. At the same time in the Palomar Observatory in San Diego noted the source of outbreaks J1249 + 3449 generated by a black hole in the quasar structure.
It turned out that these two events occurred in the same place. Scientist Matthew Graham suggested that the flash of light gave rise to colliding black holes.
They revolved around a more massive black hole, which received a boost from the merger. This momentum could push a black hole in the side, pitting her with the gas in the disk, which creates a flash of light.
Around black holes there is a accretion disk, and occasionally generates flashes of light. But the observed phenomenon was much more powerful and has an unusual nature.
Astronomers were able to exclude a supernova explosion or disruption of a star by a black hole, but to know the exact nature of the outbreak could not.