Astronomers have discovered a new type of fast radio burst (FRB) called “ultra-fast radio bursts”. These bursts last for ten millionths of a second or less.
FRBs are intense, millisecond-long bursts of radio waves with unknown origins. They are the brightest radio bursts found in nature, but they are so transient that astrophysicists can only “see” them momentarily using large radio telescopes.
A recent study published in Nature Astronomy examines the discovery of “ultra-fast radio bursts”. The team determined that these bursts last for ten millionths of a second or less.
Astronomers have also detected a fast radio burst that occurred 8 billion years ago. This particular FRB, known as FRB 20220610A, released an amount of energy equivalent to the sun’s emissions over three decades in less than a millisecond.
Astronomers have detected an intense flash of radio waves coming from what looks like a merger of galaxies dating to about 8 billion years ago – the oldest-known instance of a phenomenon called a fast radio burst that continues to defy explanation
Astrophysicist Duncan Lorimer and his student David Narkevic discovered the first FRB in 2007. They found it in archival data from the observatory. Lorimer and his colleagues described the FRB as a “bright millisecond radio burst of extragalactic origin” in a paper that same year.
The late Australian astronomer Jean-Pierre Macquart demonstrated in 2020 that fast radio bursts can be used to detect missing matter. The Macquart relation states that the farther away an FRB is, the more diffuse gas it reveals between galaxies.
A global team led by Stuart Ryder of Macquarie University and Ryan Shannon of Swinburne University of Technology reported on their discovery of the most distant FRB ever detected. The team included J. Xavier Prochaska, a professor of astronomy at UC Santa Cruz.
The exact origin of FRBs is still unknown. However, scientists have proposed several possible causes, including:
- Magnetars, which are neutron stars with extremely powerful magnetic fields
- Colliding neutron star binaries
- Merging white dwarfs
- Rapidly rotating neutron stars
- Black holes
- Extraterrestrial intelligence
A 2020 study found that a fast radio burst in the Milky Way was associated with a magnetar. A correlation between the observed frequencies and polarizations of the energetic radio pulses suggests the bursts originate in active regions such as magnetars in binary systems.
The source of the most distant FRB ever detected was a group of two or three galaxies that are merging
Fast radio bursts (FRBs) are transient radio pulses that last from a fraction of a millisecond to three seconds. They are usually thousandths of a second long. Some FRBs repeat, but most only happen once.
The average FRB releases as much energy in a millisecond as the Sun does in three days.
The most well-traveled FRB to date took 8 billion years to reach Earth. It traveled through the universe for almost half the age of the universe.
Astronomers use large satellite dishes or arrays of satellite dishes to detect FRBs. The ASKAP array of radio telescopes in Western Australia is currently the best radio telescope for detecting and locating FRBs. The SKA telescopes, which are currently under construction in Australia and South Africa, will be even more sensitive.
The first FRB was detected in 2007. The first FRB in the Milky Way was detected in April 2020 by the CHIME radio telescope. In June 2021, astronomers reported over 500 FRBs from outer space
The first FRB was detected in 2007. The FRB was found in archival data recorded by the Parkes Observatory on July 24, 2001. The FRB was called the Lorimer Burst FRB 010724.
The FRB was described in a paper by astrophysicist Duncan Lorimer and his colleagues. They described the FRB as a “bright millisecond radio burst of extragalactic origin
FRBs are extremely powerful at their source. They can release as much energy in a millisecond as the sun emits in three days. However, because they come from billions of light-years away, they lose energy as they travel. When they reach Earth, they are much less powerful. The strength of the signal reaching Earth has been described as 1,000 times less than from a mobile phone on the Moon.
The first FRB was discovered in 2007. As of June 2021, 140 more had been discovered
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