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Sub-second periodicity in a fast radio burst

  • McGill University
  • West Virginia University
  • University of Toronto
  • Cornell University
  • University of British Columbia
  • Perimeter Institute for Theoretical Physics
  • National Research Council of Canada
  • University of Waterloo
  • Massachusetts Institute of Technology
  • California Institute of Technology
  • Academia Sinica - Institute of Astronomy and Astrophysics
  • Yale University
  • Canadian Institute for Advanced Research
  • University of Amsterdam

Research output: Contribution to journalArticlepeer-review

90 Scopus citations

Abstract

Fast radio bursts (FRBs) are millisecond-duration flashes of radio waves that are visible at distances of billions of light years1. The nature of their progenitors and their emission mechanism remain open astrophysical questions2. Here we report the detection of the multicomponent FRB 20191221A and the identification of a periodic separation of 216.8(1) ms between its components, with a significance of 6.5σ. The long (roughly 3 s) duration and nine or more components forming the pulse profile make this source an outlier in the FRB population. Such short periodicity provides strong evidence for a neutron-star origin of the event. Moreover, our detection favours emission arising from the neutron-star magnetosphere3,4, as opposed to emission regions located further away from the star, as predicted by some models5.

Original languageEnglish
Pages (from-to)256-259
Number of pages4
JournalNature
Volume607
Issue number7918
DOIs
StatePublished - Jul 14 2022

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