The Absence of Periodicity in Repeating FRB

Abstract

Popular Fast Radio Burst models involve rotating magnetized neutron stars, yet no rotational periodicities have been found. Small datasets exclude exact periodicity in FRB 121102. Recent observations of over 1500 bursts from each of FRB 121102 and FRB 20201124A also have not found periodicity. Periodograms of events with cosine-distributed random offsets as large as $\pm 0.6P$ from a strict period $P$ would still reveal the underlying periodicity. The sensitivity of periodograms of long data series, such as bursts observed on multiple days, to slow frequency drifts is mitigated by considering individual observing sessions, and results are shown for FRB 121102. Models of repeating FRB without intrinsic periodicity are considered, as are models of apparently non-repeating FRB.

8 pp, 4 figures In press MNRAS

References in corpus (11)

• The First CHIME/FRB Fast Radio Burst Catalog
• Fast radio bursts as synchrotron maser emission from decelerating relativistic blast waves
• The Repeating Fast Radio Burst FRB 121102 as Seen on Milliarcsecond Angular Scales
• A bimodal burst energy distribution of a repeating fast radio burst source
• Possible periodic activity in the repeating FRB 121102
• No redshift evolution of non-repeating fast radio-burst rates
• FRB as Products of Accretion Disc Funnels
• Are Fast Radio Bursts Made By Neutron Stars?
• A simple relationship for the spectro-temporal structure of bursts from FRB 121102
• The Environment of FRB 121102 and Possible Relation to SGR/PSR J1745-2900
• When Outliers Are Different

Cited by in corpus (4)

• The Physics of Fast Radio Bursts
• A Comprehensive Analysis on Repeating Fast Radio Bursts
• A Possible Subclassification of Fast Radio Bursts
• The Sources of Apparently Non-Repeating FRB