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A blast of radio waves hit Earth after travelling for 8 billion years

October 19, 2023
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A blast of radio waves hit Earth after travelling for 8 billion years
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Artist's impression of the path the fast radio burst FRB 20220610A took between the distant galaxy where it originated and Earth, in one of the Milky Way's spiral arms (not to scale)

Artist’s impression of the trail the quick radio burst FRB 20220610A took between the galaxy the place it originated (high left) and Earth, in one of many Milky Method’s spiral arms

ESO/M. Kornmesser

Astronomers have noticed the oldest quick radio burst (FRB) ever seen, courting again 8 billion years. A whole lot of those unusual blasts of radio waves from area have now been detected on Earth since their discovery in 2007, however this one can also be probably the most energetic ever seen.

“The burst has the power that the solar produces in 30 years,” says Ryan Shannon on the Swinburne College of Expertise in Australia. “That’s sufficient energy to microwave a bowl of popcorn about two instances the dimensions of the solar.”

Shannon and his colleagues noticed the blast of radiation, named FRB 20220610A, utilizing the Australian Sq. Kilometre Array Pathfinder radio telescope and located that the FRB was three-and-a-half instances as energetic as different detected FRBs.

FRBs are thought to return from extremely magnetised neutron stars from distant galaxies and normally final only a fraction of a second. “Most of them are by no means seen once more after they’ve been first discovered,” says Shannon.

Trying nearer on the level within the sky the place the emission got here from utilizing the Very Giant Telescope in Chile, the researchers discovered a cluster of galaxies that they assume incorporates the supply of the blast.

“Meaning that the burst has been travelling via area for nearly 8 billion years,” says staff member Stuart Ryder at Macquarie College, Australia.

The earlier document holder travelled for simply 5 billion years, so this newest discovery means that FRBs have been taking place for not less than half the age of the universe, which is about 13.7 billion years previous.

Astronomers examine FRBs to attempt to construct a greater image of the early universe. When these blasts attain Earth, some waves arrive with barely longer wavelengths than others, as a result of on the journey from the supply galaxy to us, the FRB interacts with the stuff in between – principally freely floating ionised particles like electrons – slowing a few of the waves down and stretching their wavelengths.

Observing this permits astronomers to work out how uniform the matter between galaxies is, says Shannon.

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