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Earth picked up 1,652 bombarding radio signals from the strange galaxy.

Saturday, October 16, 2021 15:00 PM (GMT+7)

The mysterious radio signals originate from a dwarf galaxy 3 billion light-years away, in the constellation Auriga.

According to Sci-News, the radio signals are emitted by the mysterious galaxy in the form of radio bursts (FRBs), which are signals that emit only a fraction of a second, but are extremely powerful. 1,652 signals this time were detected by the FAST radio telescope located at the Observatory in Qiannan Buyei (China).

FAST picked up more than 1,600 radio signals from the same source in just 47 days – Photo: National Astronomical Observatory – Chinese Academy of Sciences

Dr. Bing Zhang from the Department of Physics and Astronomy, University of Nevada (USA), one of the lead authors of the study, said there are two operating models that can explain the origin of radio flashes: they can come from magnetic spheres in the universe, or from a magnetic star.

Magnetic stars are the most commonly supported hypothesis by astronomers when it comes to radio flashes. It is a type of neutron star with a particularly strong magnetic field, while each neutron star is already a “monster”. Neutron stars are thought to be the final remains after a massive star dies: a first collapse into a white dwarf, a second collapse into a neutron star or black hole.

With this new signal source, the researchers are also leaning towards the hypothesis that a magnetic star is involved. But the most difficult thing to explain is that this 47-day broadcast took up 3.8% of the available energy from a common magnetic star, which is too much. They believe that there must be an accompanying event or some mysterious cosmic “monster” associated with the magnetic star.

The new radio signal source, named FRB 121102, emitted a total of 1,652 radio bursts from August 29 to October 29, 2019, of which the most intense burst was 122 signals only. within 1 hour. Scientists struggled to trace the source of the signal, and determined it to be a dwarf galaxy in the constellation Aurora. The signal is so strong that even though this galaxy is 3 billion light-years away, FAST can still catch it easily.

The study has just been published in the scientific journal Nature.


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