In 47 days, an international team of astrophysicists has detected more than 1,600 rapid radio bursts (FRBs) from the same radio source. The researchers’ article was published in the journal Nature.
FRB – radio pulses several milliseconds long, whose energy is comparable to that emitted by the Sun for tens of thousands of years. Since their discovery in 2007, astronomers have been explaining how and where these mysterious cosmic signals originate, tracking them with powerful radio telescopes. In 2020, the first reliable source of FRB was installed – a magnetar (a neutron star with a strong magnetic field) in the constellation Chanterelles.
During testing of the FAST radio telescope, the world‘s largest closed-aperture radio telescope, researchers from China and Germany and the United States found that the pulse flow from FRB 121102, the only known source of repetitive FRBs and the first well-established location in space, is increasing. . From August 29 to October 29, 2019, one thousand six hundred and fifty-two radio bursts with a total duration of almost 60 hours were recorded. Once per hour, 122 FRB was recorded – the highest frequency for such phenomena.
“The total energy from this set of bursts is 3.8 percent of that available to the magnetar. No periodicity was detected between milliseconds and thousandths of a second. Both of these factors severely limit the possibility that the FRB 121102 is an isolated compact object, ”said Wang Pei, a researcher at the National Astronomical Observatory of China.
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