Scientists have discovered more details about the most popular repetition Fast radio explosion, A mysterious phenomenon that astronomers have yet to explain.
A decade after the FRBs were first discovered, astronomers first witnessed this rapid radio explosion in 2018 known as the FRB20180916B. Although some FRBs flash privately at night, Some rotational rhythm again and again; This particular FRB belongs to the latter category, which is quiet for 12 after four days of eruption. These are the closest FRB scientists have ever found in a “only” place 500 million light years away.
Frequent and close mixing makes FRB particularly impressive to study, and two teams of researchers recently did just that.
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One team used dozens of findings Low Frequency Line (LOFAR) European and Canadian Hydrogen Intensity Mapping Test (CHIME) to explore the wavelength range of radio waves produced by FRB. The researchers were able to extract emissions from FRB20180916B using LOFAR, which is three times longer (three times lower frequency) than previously observed emissions from the same FRB.
“This tells us that the area around the source of the explosions should be exposed to low-frequency emissions, while some theories have suggested that some low-frequency emissions can be absorbed now and never detected,” said physicist Gigi Blunis, principal editor of McGill University in Canada and one of the new studies. Said in a statement.
In addition, these particularly long wavelengths of the FRB took longer for Earth’s discoverers to cover the vast distances from the source of the FRB. For each rhythmic eruption, LOFAR detected long radio waves three days after CHOME detected short radio waves.
“This systematic delay rejects explanations for periodic functions that do not allow frequency dependence, thus approaching some steps to understanding the origin of these mysterious eruptions,” said Daniel Michelle McGill, co-author and another physicist in the paper, in the same statement.
This second new article on the FRB is based on observations collected by Europeans Very long-basic interferometer Networking. This research uses the characteristics of light, called polarization, encoded within the four bursts of the FRB to study how the light in each pulse changes over time.
In previous research FRB pulses varied by 30 microseconds or millions per second. But new research suggests that at least for this particular FRB, some aspects of the signal may last for a few microseconds, while other characteristics may run for long periods of time.
Scientists hope that all these new observations will help reduce the range of theories that cause FRBs. In particular, in the first paper the researchers point to a scenario of their study in which a magnetic superdense star corpse a Magnet A large asteroid interacts with at least 10 times the mass of our Sun. In that scenario, the FRB is produced as a stream of charged particles flowing from the asteroid “combs” through the magnetically managed area around the magnet.
That theory is based on future observations of FRB20180916B.
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