The nature of the signals is still unknown.
Scientists using the CHIME observatory in Canada have recorded 25 repeating Fast Radio Bursts (FRBs). These are very fast signals that are registered in space, the nature of which is still unknown, reports Science Alert.
It is noted that information about the FRB was discovered in archival data collected by the observatory in 2019-2021.
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FRBs occur quite often, but despite this, the nature of their origin remains a mystery to scientists. The source of some of them is neutron stars and black holes, but others cannot be classified.
Also read: Astronomers managed to catch a mysterious signal from space
CHIME was originally designed to measure the expansion history of the universe by detecting neutral hydrogen. In particular, the observatory aims to capture the wavelength of light that neutral hydrogen absorbs and emits, known as the 21-centimeter hydrogen line. But CHIME has demonstrated its ability to detect FRBs.
So, from 2018 to 2019, it recorded 536 such signals, including 62 repeating bursts from 18 previously unknown sources. In the course of the new study, scientists used a new algorithm for their detection.
Out of 1,000 FRBs registered at the moment, only 29 are repeated. Scientists also found out that repeated FRBs are repeated irregularly. The only exception is FRB 180916, discovered by CHIME researchers in 2018 (reported in 2020), which pulsates every 16.35 days.
Using this new algorithm, the CHIME/FRB collaboration discovered 25 new sources, which are repeated, almost doubling the number available for study.
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Previously scientists from the National Astronomical Observatory of the Chinese Academy of Sciences using the world's largest radio telescope FAST detected three fast radio bursts. According to researchers, these radio bursts occurred billions of years ago, when the universe was young.
