Fast Radio Bursts: Hidden Partner Revealed by Signal Flare
- astronomers have discovered the clearest evidence yet that some fast radio bursts (FRBs) originate in binary star systems, challenging previous assumptions that these powerful radio signals come from...
- Fast radio bursts are extremely powerful, millisecond-duration flashes of radio waves originating from distant galaxies.
- The research team utilized the Five-hundred-meter Aperture Spherical Telescope (FAST) in Guizhou, China, also known as the "China Sky Eye," to make this discovery.
Fast radio Bursts Linked to Binary Star Systems, New research Shows
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astronomers have discovered the clearest evidence yet that some fast radio bursts (FRBs) originate in binary star systems, challenging previous assumptions that these powerful radio signals come from isolated stars.
Understanding Fast Radio Bursts
Fast radio bursts are extremely powerful, millisecond-duration flashes of radio waves originating from distant galaxies. Until recently, the prevailing theory suggested these signals stemmed from single stars. This new research indicates at least some FRBs are produced within systems containing two stars orbiting each other.
Breakthrough Revelation with FAST Telescope
The research team utilized the Five-hundred-meter Aperture Spherical Telescope (FAST) in Guizhou, China, also known as the “China Sky Eye,” to make this discovery. Over nearly 20 months of observation, they monitored a repeating FRB located approximately 2.5 billion light-years from Earth. The findings were published in the journal Science on January 26, 2024.
Evidence of a Companion Star
Researchers detected a unique signal, termed an ‘RM flare,’ which indicated the presence of a nearby companion star. RM flares involve a sudden shift in the polarization properties of the radio signal. The team believes this flare was caused by a coronal mass ejection (CME) from the companion star, releasing magnetized plasma that altered the space around the FRB source.
“This finding provides a definitive clue to the origin of at least some repeating FRBs,” said Professor Bing zhang, Chair Professor of Astrophysics at The University of Hong Kong (HKU) and Founding Director of the HKU Center for Astrophysical Research.
this discovery, made by an international research team including scientists from HKU’s Department of Physics, considerably advances our understanding of the origins and mechanisms behind these mysterious cosmic events.