Periodic Fast Radio Bursts with Neutron Star Free/Radiative Precession

Abstract

The CHIME/FRB collaboration recently reported the detection of a 16 day periodicity in the arrival times of radio bursts from FRB 180916.J0158+65. We study the possibility that the observed periodicity arises from free precession of a magnetized neutron star, and put constraints on different components of the star's magnetic fields. Using a simple geometric model, where radio bursts are emitted from a rotating neutron star magnetosphere, we show that the emission pattern as a function of time can match that observed from FRB 180916.J0158+65.

7 pages, 6 figures, accepted to ApJL

References in corpus (5)

• Fast Radio Bursts
• A periodically active pulsar giving insight into magnetospheric physics
• CHIME/FRB Detection of Eight New Repeating Fast Radio Burst Sources
• Electromagnetic Torques, Precession and Evolution of Magnetic Inclination of Pulsars
• A possible way to reconcile long-period precession with vortex pinning in neutron stars

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