pasipūtimas radijo Burst FRB 20220610A, the most powerful radio burst ever observed was detected on 10 June 2022. It had originated from a source that existed 8.5 billion years ago when the visata was just 5 billion years old which makes the source farthest known for an FRB. The source was thought to be either a single, irregular galaktika or a group of three distant galaxies. However, study of images captured by Hablo telescope on follow-up after its discovery reveals seven sources, one of which was identified as the host galaktika. The host galaktika was also determined to be a star-forming galaktika. The study identified the system as a compact galaktika group whose members showed signs of interaction among themselves. Galaxies in compact groups are uncommon, hence the finding of FRB 20220610A originating in such an environment presents a novel origin of FRBs.
Greiti radijo pliūpsniai (FRB), dar vadinami Lorimer Bursts, yra itin energingas radijo bangų blyksnis. Jie yra labai trumpi ir trunka kelias milisekundes. Nuo pirmojo Duncano Lorimerio 2007 m. atradimo buvo aptikta apie 1000 FRB.
The fast radio burst FRB 20220610A was detected on 10 June 2022. Four times more energetic than closer FRBs, it was the most powerful fast radio burst (FRB) ever observed. It had originated from its source that existed 8.5 billion years ago when the visata was only 5 billion years old. The FRB had travelled for 8.5 billion years to reach Hablo. The source was the farthest known so far for any FRB and thought to be either a single, irregular galaktika or a group of three distant galaxies.
However, sharp images captured by the Hablo telescope on follow-up after its discovery has revealed that the source of FRB 20220610A was not ‘one monolithic galaktika’. Usually, FRBs originate from isolated galaxies. Instead, this fast radio burst had originated from an interacting system of at least seven galaxies in proximity on the path of merging. This development broadens the list of possible sources of FRBs.
The origin and mechanism of formation FBR is not clearly understood. Nevertheless, it is agreed that highly compact bodies like neutron žvaigždė or Juodoji skylė are involved in generation of powerful radio blasts. Extreme physics phenomena such as collision of Juodoji skylė or neutron žvaigždė, starquakes when the crust of a neutron žvaigždė undergoes sudden adjustments, sudden snaping of tangled magnetic fields of most intensely magnetic type of neutron stars (a process akin to formation of solar flares but at much higher scale), periodic interaction of magnetospheres of a pair of orbitoje neutronas žvaigždės are some of possible mechanisms of formation of Fast radio bursts (FRBs).
Mokslas apie greitųjų radijo bangų (FRB) kilmę ir susidarymo mechanizmą iš esmės yra neišsamus, tačiau naujausias tyrimas užpildo tam tikrą žinių spragą.
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Nuorodos:
- NASA Hablo misijos komanda. Naujienos – Hablas surado keistą tolimiausio spartaus radijo bangos vietą. Paskelbta 09 m. sausio 2024 d https://science.nasa.gov/missions/hubble/hubble-finds-weird-home-of-farthest-fast-radio-burst/
- Gordonas A.C., et al 2023 m. Greitas radijo pliūpsnis kompaktiškoje galaktikos grupėje z~1. Preprint arXiv:2311.10815v1. Pateikta 17 m. lapkričio 2023 d. DOI: https://doi.org/10.48550/arXiv.2311.10815
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