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According to Breaking Science News (This article and its images were originally posted on Breaking Science News December 31, 2018 at 01:43PM.)
Supermassive black holes that lurk at the center of most galaxies are surrounded by coronas — mysterious features that are sources of highly energetic particles. Like the Sun, black hole coronas are theoretically believed to be heated by their magnetic activity. Now, astrophysicists using the Atacama Large Millimeter/submillimeter Array (ALMA) have measured the magnetic fields surrounding central supermassive black holes in two active galaxies. Surprisingly, the strength of these magnetic fields does not appear to be high enough to power the black hole coronas.
In a 2014 study, Japanese astrophysicists Yoshiyuki Inoue and Akihiro Doi predicted that electrons in the plasma surrounding black holes would emit a special kind of light — called synchrotron radiation — as they exist together with the magnetic forces in the coronas.
Specifically, this radiation would be in the radio band, meaning light with a very long wavelength and low frequency. So the researchers decided to measure the coronal magnetic fields.
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This article and images were originally posted on [Breaking Science News] December 31, 2018 at 01:43PM. Credit to the original author and Breaking Science News | ESIST.T>G>S Recommended Articles Of The Day.