Scientists led by Dr. Di Li from the NAOC have discovered an extreme field reversal around Fast Radio Burst FRB 20190520B, indicating the signal may pass through a turbulent, magnetized plasma field. This discovery brings us closer to understanding the origin of these intense cosmic explosions, poss
Twisted fields around a mysterious fast radio burst. An international team has made significant progress in understanding the origins of Fast Radio Bursts – some of the most intense millisecond-duration cosmic explosions in radio bands. Credit: Di LI/ScienceApe/CAS
Fast Radio Bursts are the brightest millisecond-duration cosmic explosions in radio bands. Their unknown origin poses challenges for astronomy as well as physics. An international team led by Dr. Di Li from the National Astronomical Observatories of the Chinese Academy of Sciences carried out a monitoring campaign of FRB 20190520B, using the Parkes telescope in Australia and the Green Bank Telescope in the United States. The combined analyses have revealed an extreme field reversal around this constantly bursting source.
Through a combined analysis of data from GBT and Parkes, Dr. Yi Feng, an NAOC PhD graduate now at Zhejiang Laboratory, and Ms. Anna-Thomas from measured its polarization properties and found that the Faraday rotation measure twice changed its sign in dramatic fashion: from ~10,000 units to ~-10,000 units and vice versa. Other key contributors include Dr. Liam Connor from Caltech and Dr. Sarah Burke-Spolaor from WVU.
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