Fast radio bursts (FRBs) are intense, brief flashes of radio-frequency emissions, lasting on the order of milliseconds.
Notably it is the second discovered repeating FRB to be associated with a persistent radio source , following the localization of FRB 121102 in 2012.
"Perhaps some would have preferred to say that the first such association [between an FRB and radio source] was a coincidence, because it was hard to explain. Now the second example shows that this is a real and critical part of the life of an FRB." "One of the key questions in the field of FRBs is whether all FRB sources repeat," Di Li, of the National Astronomical Observatories of China and lead of the Commensal Radio Astronomy FAST Survey which detected FRB 190520B, told Space.com via email."I personally favor an evolutionary picture in that all sources repeat, but the activity level drops precipitously as the source ages.
Franz Kirsten, a postdoctoral researcher at the Netherlands Institute for Radio Astronomy and Chalmers University in Sweden who was not involved in the research, told Space.com that an evolutionary path for FRBs is possible, but with just these two sources, it's hard to tell.
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