The discovery doubles the known population of these repeating super-energetic cosmic explosions.
In a new study, a team led by astronomers from the Canadian Hydrogen Intensity Mapping Experiment /FRB Collaboration and the University of Toronto found 25 new repeating FRBs, bringing the total known to 50. This could lead scientists to the discovery of what causes these bursts and also suggests that many more FRBs could eventually repeat than previously thought, team members said. ; B.
Astronomers have discovered many FRBs over the last decade, but the vast majority of these have been non-repeating and were only seen to"burst" once. Only a small fraction have been seen to repeat. This has led astronomers to question ifThe fact that these two populations of FRBs seem to have different characteristics — including how long they last and the range of frequencies they are seen across — also points to their varied origins.
"We can now accurately calculate the probability that two or more bursts coming from similar locations are not just a coincidence," study team member Ziggy Pleunis, a postdoctoral fellow at the University of Toronto's Dunlap Institute for Astronomy and Astrophysics,."These new tools were essential for this study, and will also be very useful for similar research going forward.
"That's how CHIME has an edge over other telescopes when it comes to discovering FRBs," Pleunis said. One surprising aspect of this new research is the discovery that many repeating FRBs are surprisingly inactive, producing under one burst per week during CHIME's observing time. Pleunis believes that this could be because these FRBS haven't yet been observed long enough for a second burst to be spotted.
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