On its way to Earth, burst of radio waves ran into dense plasma, strong magnetic fields
Enigmatic blasts of cosmic radio waves are dropping hints about their origins. A recently discovered burst appears to originate in or near a relatively young stellar neighborhood in another galaxy, researchers report online December 2 in Nature.
This fast radio burst, FRB 110523, has much in common with previously detected bursts (SN: 8/9/14, p. 22). It lasted for just a few milliseconds, did not repeat and originated well outside the Milky Way — in this case, up to 6 billion light-years away in the constellation Aquarius. But the burst provided an extra piece of information. The radio waves showed signs of having run into strong magnetic fields and dense blobs of plasma, often found near young stars, astrophysicist Kiyoshi Masui of the University of British Columbia in Canada and colleagues report.