Periodic activity from a fast radio burst source
Name
Periodic activity from a fast radio burst.pdf
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Checksum (MD5)
908cd155aadfa69312b7cf3e45b35d03
Author(s)
CHIME/FRB Collaboration
Amiri, M.
Andersen, B. C.
Bandura, K. M.
Bhardwaj, M.
Boyle, P. J.
Brar, C.
Chawla, P.
Chen, Ting
Cliche, J. F.
Date Issued
June 2020
Journal
Nature
Publisher
Springer Science and Business Media LLC
Citation
CHIME/FRB Collaboration (Amiri, M. et al. "Periodic activity from a fast radio burst source." Nature 582, 7218 (June 2020): 351–355 © 2020 Springer Nature
Version
Original manuscript
Abstract
ast radio bursts (FRBs) are bright, millisecond-duration radio transients originating from sources at extragalactic distances, the origin of which is unknown. Some FRB sources emit repeat bursts, ruling out cataclysmic origins for those events. Despite searches for periodicity in repeat burst arrival times on timescales from milliseconds to many days these bursts have hitherto been observed to appear sporadically and—although clustered—without a regular pattern. Here we report observations of a 16.35 ± 0.15 day periodicity (or possibly a higher-frequency alias of that periodicity) from the repeating FRB 180916.J0158+65 detected by the Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst Project4,9. In 38 bursts recorded from 16 September 2018 to 4 February 2020 utc, we find that all bursts arrive in a five-day phase window, and 50 per cent of the bursts arrive in a 0.6-day phase window. Our results suggest a mechanism for periodic modulation either of the burst emission itself or through external amplification or absorption, and disfavour models invoking purely sporadic processes.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
https://doi.org/10.1038/s41586-020-2398-2
