Friday, 26 February, 2021


Mysterious radio bursts from space ‘repeat in pattern lasting 157 days’

Таинственные радиопослания из космоса озадачили ученых Mysterious radio bursts from space ‘repeat in pattern lasting 157 days’
Kristine Garrett | 11 June, 2020, 18:41

"Detecting a periodicity provides an important constraint on the origin of the bursts and the activity cycles could argue against a precessing neutron star", commented the lead author, Dr Kaustubh Rajwade from the University of Manchester.

Up until now, scientists have found more than 100 FRBs, and majority are one-offs, which means that they're flaring up just one time.

Individual radio bursts emit once and don't repeat. It was the first FRB to appear multiple times on an apparently regular schedule, and researchers believe it is on a 157-day cycle, which becomes noisy for up to three months in a row. for just over two months.

They have yet to determine the actual cause of the bursts. Then, in 2016, scientists found that FRB 121102 actually repeated.

In 2017, astronomers pinpointed the location of the FRB 121102 source and reported that it lies in a star-forming region of a dwarf galaxy more than 3 billion light years from Earth.

Another vhas declared the revelation of a second rehashing FRB that is similarly following an example. Researchers believed these powerful bursts could be due to the orbit of a massive star, a black hole or a dense neutron star.

The scientists said the discovery marks an important step in finding the origins of FRBs. The burst seems to flare up for 90 days, exclusively to die down for an additional 67 earlier than repeating once more, in accordance with the findings, which have been not too long ago printed within the Month-to-month Notices of the Royal Astronomical Society journal.

Despite progress with this latest study, much is still left unknown and it will fall to the long-term reliant monitoring capabilities such as those provided by the Lovell Telescope to determine, amongst other things, if this coherent repeating feature is common or limited to a select few bursts.

Repeating fast radio bursts could be explained by the precession, similar to a wobbling top, of the magnetic axis of a hugely magnetized neutron star.

"Answering these questions will take us closer to the true source of FRBs", Rajwade said.

This pattern was detected by astronomers at the University of Manchester, who used the Lovell Telescope to monitor the FRB for the past four years.

The existence of FRBs was only discovered in 2007 and they were initially thought to be one-off events related to a cataclysmic event such as an exploding star. Now, researchers know they can have patterns as well.

Duncan Lorimer, study coauthor, associate dean for research and professor of physics and astronomy at West Virginia University, also spoke out about the FRBs and how exciting the new pattern is. "Further observations of a larger number of FRBs will be needed in order to obtain a clearer picture about these periodic sources and elucidate their origin", he added.

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