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The place do quick radio bursts come from? Astronomers tie mysterious eruptions to large galaxies

November 10, 2024
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The place do quick radio bursts come from? Astronomers tie mysterious eruptions to large galaxies
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Each day, invisible to the human eye, hundreds of enigmatic flashes of cosmic power often known as quick radio bursts (FRBs) erupt throughout the sky, releasing as a lot power in milliseconds because the solar does in a day.

Due to their fleeting nature, scientists have typically needed to depend on luck simply to look at FRBs, not to mention pinpoint the place they arrive from or what causes them to behave the way in which they do.

Now, astronomers led by Kritti Sharma on the California Institute of Expertise posit that such energy-packed mild flashes are likely to happen in large, star-forming galaxies from highly effective eruptions of uncommon, long-dead stars often known as magnetars. These findings, the researchers say, additionally level to magnetars themselves being cosmic fusions of two stars, pinning down one potential formation pathway for the mysterious objects.

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“Little or no is understood about what causes the formation of magnetars upon the dying of large stars,” Sharma stated in a recent news release. “Our work helps to reply this query.”

Associated: What are quick radio bursts?

By analyzing the house galaxies of 30 FRBs recorded by California’s Deep Synoptic Array-110, Sharma and her colleagues discovered that the bursts originated in large, star-forming galaxies wealthy in “metals” — astronomer-speak for any factor heavier than hydrogen and helium. Such metal-rich environments could also be conducive to the formation of magnetars, that are the main candidates for producing FRBs, in response to the researchers.

Magnetars, a sort of neutron star, stands out as the explosive remnants of stellar mergers, somewhat than the results of large stars collapsing and exploding as supernovae, for the reason that phenomena originate in several types of environments, the group steered in a paper revealed Wednesday (Nov. 6) within the journal Nature.

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Metallic-rich stars that reside in pairs in such galaxies are likely to turn out to be much less compact as they evolve, accelerating the switch of mass between them and successfully initiating the timeline for a stellar merger, the researchers say. The surviving star, normally the bigger of the 2, is rejuvenated by burning the gas accreted from its companion, resulting in amplified magnetic fields which can be a whole bunch of trillions of instances stronger than Earth’s — a magnetar.

This situation might additionally clarify the occasional detection of FRBs in areas with previous stars, as binary star techniques usually reside longer in comparison with remoted magnetars, Nature Information reported.

Different questions linger concerning the nature of FRBs, together with why a handful appear to go off a number of instances a day whereas others flash solely as soon as.

“We do not know what’s inflicting them,” Ayush Pandhi of the College of Toronto in Canada advised Astronomy.com. “It is one of many huge mysteries in astronomy proper now.”



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