Eight new repeating fast radio bursts detected

phys.org | 1/9/2019 | Staff
sheenabeanna (Posted by) Level 3
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Detection positions of the new CHIME/FRB repeating FRB sources. Credit: Andersen et al., 2019.

Using the Canadian Hydrogen Intensity Mapping Experiment (CHIME) telescope, astronomers have identified eight new repeating fast radio burst (FRB) sources. The finding, reported in a paper published August 9 on arXiv.org, could shed new light on the origin and nature of these mysterious phenomena.

FRBs - Bursts - Radio - Emission - Milliseconds

FRBs are intense bursts of radio emission lasting milliseconds and showcasing characteristic dispersion sweep of radio pulsars. The physical nature of these bursts is yet unknown, and astronomers consider a variety of explanations ranging from synchrotron maser emission from young magnetars in supernova remnants to cosmic string cusps.

The first FRB was discovered in 2007. Known as the Lorimer Burst, the bursts was a singular event such as a supernova. Five years later, the first repeating FRB was detected. Named FRB 121102, the source exhibits complex burst morphology, sub-burst downward frequency drifts, and also complex pulse phenomenology.

Dozens - FRBs - Date - Signals - Repeaters

Although dozens of FRBs have been identified to date, only two of them were found to repeat their signals. These repeaters could be the key to resolving the mysteries of FRBs as astronomers anticipating the upcoming bursts can prepare extensive follow-up observational campaigns aimed at investigating such flashes in detail.

Now, a team of astronomers led by Bridget C. Andersen of McGill University in Montreal, Canada, reports the detection of eight new FRB repeaters, which could mean a breakthrough in studies of these flaring events.

Discovery - FRB - Sources - Hydrogen - Intensity

"We report on the discovery of eight repeating FRB sources found using the Canadian Hydrogen Intensity Mapping Experiment (CHIME) telescope," the astronomers wrote in the paper.

The newly...
(Excerpt) Read more at: phys.org
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