Sub-second periodicity in a fast radio burst
- Collaboration, The CHIME/FRB
- Andersen, Bridget C.
- Bandura, Kevin
- Bhardwaj, Mohit
- Boyle, P. J.
- Brar, Charanjot
- Breitman, Daniela
- Cassanelli, Tomas
- Chatterjee, Shami
- Chawla, Pragya
- Cliche, Jean-François
- Cubranic, Davor
- Curtin, Alice P.
- Deng, Meiling
- Dobbs, Matt
- Dong, Fengqiu Adam
- Fonseca, Emmanuel
- Gaensler, B. M.
- Giri, Utkarsh
- Good, Deborah C.
- Hill, Alex S.
- Josephy, Alexander
- Kaczmarek, J. F.
- Kader, Zarif
- Kania, Joseph
- Kaspi, Victoria M.
- Leung, Calvin
- Li, D. Z.
- Lin, Hsiu-Hsien
- Masui, Kiyoshi W.
- Mckinven, Ryan
- Mena-Parra, Juan
- Merryfield, Marcus
- Meyers, B. W.
- Michilli, D.
- Naidu, Arun
- Newburgh, Laura
- Ng, C.
- Ordog, Anna
- Patel, Chitrang
- Pearlman, Aaron B.
- Pen, Ue-Li
- Petroff, Emily
- Pleunis, Ziggy
- Rafiei-Ravandi, Masoud
- Rahman, Mubdi
- Ransom, Scott
- Renard, Andre
- Sanghavi, Pranav
- Scholz, Paul
- Shaw, J. Richard
- Shin, Kaitlyn
- Siegel, Seth R.
- Singh, Saurabh
- Smith, Kendrick
- Stairs, Ingrid
- Tan, Chia Min
- Tendulkar, Shriharsh P.
- Vanderlinde, Keith
- Wiebe, D. V.
- Wulf, Dallas
- Zwaniga, Andrew
DOIAbstract
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...
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