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Researchers at the University of Helsinki have advanced our understanding of black holes using supercomputer simulations, revealing how magnetic fields cause turbulence that heatsTheir groundbreaking study, which included all significant quantum interactions between radiation and plasma, shows that the plasma around black holes can exist in two states, contributing significantly to our knowledge of cosmic phenomena.
Most of the observed black holes have a companion star, with which they form a binary star system. In the binary system, the two objects orbit each other, and the matter of the companion star slowly spirals into the black hole. This slowly flowing stream of gas often forms an accretion disk around the black hole, a bright, observable source of X-rays.Since the 1970s, attempts have been made to model the radiation from the accretion flows around the black holes.
In the modeled mixture of electron-positron plasma and photons, the local X-ray radiation can turn into electrons and positrons, which can then annihilate back into radiation, as they come in contact. “In everyday life, such quantum phenomena where matter suddenly appears in place of extremely bright light are, of course, not seen, but near black holes, they become crucial,” Nättilä says.
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