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Sub-second periodicity in a fast radio burst

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arxiv 2107.08463 v2 pith:3OLNDQ37 submitted 2021-07-18 astro-ph.HE

The CHIME/FRB Collaboration , Bridget C. Andersen , Kevin Bandura , Mohit Bhardwaj , P. J. Boyle , Charanjot Brar , Daniela Breitman , Tomas Cassanelli
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Shami Chatterjee Pragya Chawla Jean-François Cliche Davor Cubranic Alice P. Curtin Meiling Deng Matt Dobbs Fengqiu Adam Dong Emmanuel Fonseca B. M. Gaensler Utkarsh Giri Deborah C. Good Alex S. Hill Alexander Josephy J. F. Kaczmarek Zarif Kader Joseph Kania Victoria M. Kaspi Calvin Leung D. Z. Li Hsiu-Hsien Lin Kiyoshi W. Masui Ryan Mckinven Juan Mena-Parra Marcus Merryfield B. W. Meyers D. Michilli Arun Naidu Laura Newburgh C. Ng Anna Ordog Chitrang Patel Aaron B. Pearlman Ue-Li Pen Emily Petroff Ziggy Pleunis Masoud Rafiei-Ravandi Mubdi Rahman Scott Ransom Andre Renard Pranav Sanghavi Paul Scholz J. Richard Shaw Kaitlyn Shin Seth R. Siegel Saurabh Singh Kendrick Smith Ingrid Stairs Chia Min Tan Shriharsh P. Tendulkar Keith Vanderlinde D. V. Wiebe Dallas Wulf Andrew Zwaniga
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classification astro-ph.HE
keywords emissionradiocomponentsdetectionfastneutron-starperiodicityarising
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Fast radio bursts (FRBs) are millisecond-duration flashes of radio waves that are visible at distances of billions of light-years. The nature of their progenitors and their emission mechanism remain open astrophysical questions. Here we report the detection of the multi-component FRB 20191221A and the identification of a periodic separation of 216.8(1) ms between its components with a significance of 6.5 sigmas. The long (~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 magnetosphere, as opposed to emission regions located further away from the star, as predicted by some models.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Unified kinetic theory of induced scattering: Compton, Brillouin, and Raman processes in magnetized electron and positron pair plasma

    astro-ph.HE 2025-10 conditional novelty 6.0 of 10

    In strongly magnetized pair plasma, induced Compton and Brillouin scattering dominate in ordinary/neutral modes, while stimulated Raman scattering is enabled in a charged mode with growth rate (t_R)^-1 = a_e (omega0/o...

  2. H.E.S.S. programme searching for VHE gamma rays associated with FRBs

    astro-ph.HE 2025-07 conditional novelty 5.0 of 10

    H.E.S.S. found no very high energy gamma-ray counterpart to targeted fast radio bursts, setting 99% confidence upper limits on their luminosity of 10^44 to 10^48 erg/s.

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