2023-11-28 16:16:14
And international team of astrophysicists has discovered that the rapid radio bursts that they have seen in their research images come from a ‘hypernebulosis‘, a large cloud of dense, highly magnetic plasma that is illuminated by the object that generates the bursts.
The discovery has been possible thanks to the high resolution images obtained by the European network of EVNa consortium of which the antenna of Jebes in Guadalajaraalong with others from European countries.
Los FRBs (fast radio bursts) are phenomena that come from very distant galaxies and that only last Thousandths of a second but each one frees as much energy as the Sun emits in a single day.
FRB 20121102A It is the first astrophysical object discovered that produced more than one burst, and until now it was the only one found within a hypernebulosis.
Recently, the team that discovered the origin of that burst found a second FRB, FRB 20190520B, also associated with a hypernebula. The discovery was made with the Chinese 500-meter telescope FAST.
“With these observations we have been able to limit the size of this stellar cloud to just under 30 light years in diameter, something reasonably small compared to other clouds of this type”Explain Shivani Bhandarilead author of the discovery and researcher at the University of Amsterdam.
These images have also allowed us to measure the brightness of this cloud or hypernebula, which is hundreds of thousands of times brighter than our Sunmaking it an incredibly bright object.
Thanks to theoretical models, astronomers have been able to limit the age of this object to an interval between 4 y 1900 years, being the youngest hypernebula in the last 900 years.
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As the Spanish astrophysicist has explained Benito Marcotesecond author of the study, the two objects are twins because “both produce frequent outbursts and are found in dwarf galaxies within stellar regions with extreme conditions”.
Researchers will not fully know if all FRBs are produced by magnetars or if there may be various objects producing these bursts that last less than a Sigh.
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