Australian researchers DOUBLE the number of known fast radio bursts
Record breaking number of new ‘alien’ fast radio bursts found: Australian study DOUBLES the number of mysterious signals spotted from Earth
- Researchers discovered 19 signals believed to be emanating from deep space, which nearly doubles the total number of known fast radio bursts
- Some of the blasts were the closest and brightest FRBs ever found, they said
- It’s still unclear what causes FRBs, but experts posit they may be coming from a giant cosmic object, such as a neutron star, or a new and far-flung alien race
- The latest bursts were picked up by the Australia Square Kilometre Array Pathfinder (ASKAP) telescope, which is equipped with 36 dishes total
- Researcher also proved the FRBs are coming from the other side of the universe
Australian researchers have discovered a record breaking number of brief but powerful bursts of radio waves emanating from deep space.
CSIRO radio telescopes in Western Australia detected 19 of the mysterious blasts, which nearly doubles the total number of known fast radio bursts (FRBs).
Among the 19 signals observed were some of the closest and brightest FRBs ever detected, researchers from the Swinburne University of Technology found.
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CSIRO radio telescopes (shown in a rendering) in Western Australia detected 19 of the mysterious blasts, which nearly doubles the total number of known fast radio bursts (FRBs)
Fast radio bursts are elusive signals that last just a few milliseconds, and are thought to originate billions of light-years away – but, scientists don’t yet know what causes them.
They also generate an intense blast of energy – enough that it’s almost equivalent to the amount released by the sun over the course of 80 years.
‘We’ve found 20 fast radio bursts in a year, almost doubling the number detected worldwide since they were discovered in 2007,’ Ryan Shannon, lead author of the study, said in a statement.
The scientists say they’ve also proved that the FRBs are coming from the other side of the universe, ‘rather than from our own galactic neighborhood.’
FRBs typically travel for billions of years, occasionally passing through clouds of gas.
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Scientists pay close attention to the arrival of the different wavelengths to learn how much material the burst has traveled through on its journey.
‘Each time this happens, the different wavelengths that make up a burst are slowed by different amounts,’ Jean-Pierre Macquart, a co-author of the study, noted.
‘Eventually, the burst reaches Earth with its spread of wavelengths arriving at the telescope at slightly different times, like swimmers at a finish line.
Artist’s impression of CSIRO’s Australian SKA Pathfinder (ASKAP) radio telescope observing ‘fast radio bursts’ in ‘fly’s eye mode’. Each antenna points in a slightly different direction, giving maximum sky coverage
‘…And because we’ve shown that fast radio bursts come from far away, we can use them to detect all the missing matter located in the space between galaxies – which is a really exciting discovery.’
Scientists now know that FRBs come from about halfway across the universe, but it’s remains unclear what causes them or which galaxies they come from.
Astronomers have previously suggested that the bursts could be coming from a giant cosmic object, such as a neutron star.
Others have even wilder theories that they may originate from a far-flung alien race that’s yet to be discovered.
Fast radio bursts are elusive signals that last just a few milliseconds, and are thought to originate billions of light-years away – but, scientists don’t yet know what causes them
WHAT ARE FAST RADIO BURSTS AND WHY DO WE STUDY THEM?
Fast radio bursts, or FRBs, are radio emissions that appear temporarily and randomly, making them not only hard to find, but also hard to study.
The mystery stems from the fact it is not known what could produce such a short and sharp burst.
This has led some to speculate they could be anything from stars colliding to artificially created messages.
Scientists searching for fast radio bursts (FRBs) that some believe may be signals sent from aliens may be happening every second. The blue points in this artist’s impression of the filamentary structure of galaxies are signals from FRBs
The first FRB was spotted, or rather ‘heard’ by radio telescopes, back in 2001 but wasn’t discovered until 2007 when scientists were analysing archival data.
But it was so temporary and seemingly random that it took years for astronomers to agree it wasn’t a glitch in one of the telescope’s instruments.
Researchers from the Harvard-Smithsonian Center for Astrophysics point out that FRBs can be used to study the structure and evolution of the universe whether or not their origin is fully understood.
A large population of faraway FRBs could act as probes of material across gigantic distances.
This intervening material blurs the signal from the cosmic microwave background (CMB), the left over radiation from the Big Bang.
A careful study of this intervening material should give an improved understanding of basic cosmic constituents, such as the relative amounts of ordinary matter, dark matter and dark energy, which affect how rapidly the universe is expanding.
FRBs can also be used to trace what broke down the ‘fog’ of hydrogen atoms that pervaded the early universe into free electrons and protons, when temperatures cooled down after the Big Bang.
The team from the Swinburne University of Technology is now focusing on pinpointing the locations of the bursts on the sky.
‘We’ll be able to localise the bursts to better than a thousandth of a degree,’ Shannon said.
‘That’s about the width of a human hair seen ten metres away, and good enough to tie each burst to a particular galaxy.’
They added that the latest discovery of FRBs is largely due in part to the Australia Square Kilometre Array Pathfinder (ASKAP) telescope used to find them.
ASKAP’s massive dish has spotted numerous FRBs over the years, earning it the nickname of Sauron, after the fictional dark overlord that’s the ‘all-seeing eye’ of the Lord of the Rings series.
It’s gotten so good at spotting FRBs that scientists say it could soon spot new FRBs every few days.
The latest discovery of FRBs is largely due in part to the Australia Square Kilometre Array Pathfinder (ASKAP) telescope used to find them. ASKAP’s massive dish has spotted numerous FRBs over the years, earning it the nickname of Sauron, after the fictional dark overlord
The instrument is equipped with 36 dishes in total, which can be used either to look at one point of the sky, or be pointed in different directions to like the segments of a fly’s eye, according to CSIRO.
Using eight dishes, the telescope can see 240 square degrees all at once.
‘The telescope has a whopping field of view of 30 square degrees, 100 times larger than the full Moon,’ said CSIRO’s Keith Bannister, who engineered the systems that detected the bursts.
‘And, by using the telescope’s dish antennas in a radical way, with each pointing at a different part of the sky, we observed 240 square degrees all at once – about a thousand times the area of the full Moon.
‘ASKAP is astoundingly good for this work,’ Bannister added.
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