Using an array of ten 4.5-meter antennas at the radio astronomy observatory in Owens Valley (USA), for the second time in the entire history of observations, astronomers localized the source of a non-repeating rapid radio burst, which, as shown by further analysis, came to us from the PSO galaxy J207 + 72 located at a distance of 7.9 billion light years from Earth.
Fast radio bursts (FRB) are single and, much less often, repetitive (today only two such sources are known) radio pulses of unknown nature lasting several milliseconds recorded by radio telescopes. The typical energy of bursts, according to scientists, is equivalent to the release into outer space of the energy emitted by the Sun over several tens of thousands of years.
Since the first discovery in 2007, 86 such events were recorded, however, the source was previously localized only in one case for the repeated fast radio burst FRB 121102, the signals of which came to us from a dwarf galaxy with an active star formation 3 billion light years from Earth, and one non-repeating FRB 180924 (announced June 27, 2019 in the journal Science), originating in the galaxy-like galaxy DES J214425.25-405400.81, 3.6 billion light-years distant from us.
The source of a single single fast radio burst that came to us from the Ursa Minor constellation and received the designation FRB 190523 (according to the date of its fixation), as well as FRB 180924, is located in a massive galaxy with a moderate star formation rate.
Considering that the galaxy, in which the only localized repetitive fast radio burst originates today, is very different from those from where two single powerful radio signals of unknown origin came from, it tells us that the events provoking them can occur as in old, so in young stellar populations.
Source of a powerful radio signal from space localized
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