FAST RADIO BURSTS

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Context

• A fast radio burst that occurred when the universe was just 5 billion years old was detected in 2022.

About Fast Radio Bursts

• Mysterious emissions of radio light, known as Fast Radio Bursts (FRBs), originate from distant corners of the universe.
• These bursts, arriving from faraway galaxies, release an amount of energy in one millisecond equivalent to what the sun emits over several weeks.
• FRBs represent the most intense natural radio bursts observed. Although astrophysicists have briefly detected FRBs using expansive radio telescopes, the exact origins and triggers of these phenomena remain unknown.
• Some FRBs occur as singular, isolated events, while others exhibit a repetitive pattern, intermittently illuminating Earth.

More about the news

• Scientists have traced the origin of the farthest and most powerful fast radio burst (FRB) to a group of at least seven galaxies that appear to be merging.
• Such groups of galaxies are rare and possibly led to conditions that triggered the FRB.
• Astronomers led by Northwestern University presented the findings at the 243rd meeting of the American Astronomical Society in New Orleans, Louisiana.
• FRBs, emitted by extragalactic sources, are transient flashes of radio waves that typically last a few milliseconds.
• The energy generated in a quick burst is more than what the sun emits in an entire year.
• The most powerful and distant FRB was first detected in 2022 by the ASKAP radio telescope in Australia. The burst occurred when the universe was just 5 billion years old.
• The sources of FRB are mysterious but researchers speculate that they could be coming from a compact object such as a black hole or neutron star.
• The researchers relied on images from the Hubble Space Telescope to trace the origin of the 2022 FRB, officially known as FRB 20220610A.
• Previously, scientists thought that FRB 20220610A originated near an amorphous blob. This, they speculated, could be coming from a single, irregular galaxy or a group of three distant galaxies.
• But Hubble’s images indicate that the blob might be as many as seven galaxies that are so close that they could all fit inside our own Milky Way galaxy.
• This interaction could trigger bursts of star formation, Gordon explained. “That might indicate that the progenitor of FRB 20220610A is associated with a fairly recent population of stars, which matches what we’ve learned from other FRBs,” the expert added.
• Researchers are interested in distant FRBs as they are key to accurately measuring the missing matter of the universe.