On the Circular Polarisation of Repeating Fast Radio Bursts

Abstract

Fast spinning (e.g., sub-second) neutron star with ultra-strong magnetic fields (or so-called magnetar) is one of the promising origins of repeating fast radio bursts (FRBs). Here we discuss circularly polarised emissions produced by propagation effects in the magnetosphere of fast spinning magnetars. We argue that the polarisation-limiting region is well beyond the light cylinder, suggesting that wave mode coupling effects are unlikely to produce strong circular polarisation for fast spinning magnetars. Cyclotron absorption could be significant if the secondary plasma density is high. However, high degrees of circular polarisation can only be produced with large asymmetries in electrons and positrons. We draw attention to the non-detection of circular polarisation in current observations of known repeating FRBs. We suggest that the circular polarisation of FRBs could provide key information on their origins and help distinguish different radiation mechanisms.

arXiv commentApJ accepted

References in corpus (79)

• A bright millisecond radio burst of extragalactic origin
• The direct localization of a fast radio burst and its host
• A fast radio burst associated with a Galactic magnetar
• A bright millisecond-duration radio burst from a Galactic magnetar
• Gamma-ray Burst Afterglow with Continuous Energy Injection: Signature of a Highly-Magnetized Millisecond Pulsar
• The Host Galaxy and Redshift of the Repeating Fast Radio Burst FRB 121102
• The Proto-Magnetar Model for Gamma-Ray Bursts
• A census of baryons in the Universe from localized fast radio bursts
• An extreme magneto-ionic environment associated with the fast radio burst source FRB 121102
• A strong magnetic field around the supermassive black hole at the centre of the Galaxy
• A repeating fast radio burst source localised to a nearby spiral galaxy
• A single fast radio burst localized to a massive galaxy at cosmological distance
• CHIME/FRB Detection of Eight New Repeating Fast Radio Burst Sources
• Dense magnetized plasma associated with a fast radio burst
• Millisecond Magnetar Birth Connects FRB 121102 to Superluminous Supernovae and Long Duration Gamma-ray Bursts
• A fast radio burst localised to a massive galaxy
• The Physical Mechanisms of Fast Radio Bursts
• The repeating Fast Radio Burst FRB 121102: Multi-wavelength observations and additional bursts
• A flaring magnetar in FRB 121102?
• Fast radio burst source properties and curvature radiation model
• Supergiant Pulses from Extragalactic Neutron Stars
• The low density and magnetization of a massive galaxy halo exposed by a fast radio burst
• A real-time fast radio burst: polarization detection and multiwavelength follow-up
• A Burst in a Wind Bubble and the Impact on Baryonic Ejecta: High-Energy Gamma-Ray Flashes and Afterglows from Fast Radio Bursts and Pulsar-Driven Supernova Remnants
• Nine New Repeating Fast Radio Burst Sources from CHIME/FRB
• Host Galaxy Properties and Offset Distributions of Fast Radio Bursts: Implications for their Progenitors
• The magnetic field and turbulence of the cosmic web measured using a brilliant fast radio burst
• Bunching Coherent Curvature Radiation in Three-Dimensional Magnetic Field Geometry: Application to Pulsars and Fast Radio Bursts
• Diverse polarization angle swings from a repeating fast radio burst source
• How Soft Gamma Repeaters May Make Fast Radio Bursts
• Repeating Fast Radio Bursts from Highly Magnetized Pulsars Travelling through Asteroid Belts
• The host galaxies and progenitors of Fast Radio Bursts localized with the Australian Square Kilometre Array Pathfinder
• Fast Radio Bursts from Magnetars Born in Binary Neutron Star Mergers and Accretion Induced Collapse
• The discovery, monitoring and environment of SGR J1935+2154
• A Study of Multi-frequency Polarization Pulse Profiles of Millisecond Pulsars
• A "Cosmic Comb" Model of Fast Radio Bursts
• Implications of a "Fast Radio Burst" from a Galactic Magnetar
• High time resolution and polarisation properties of ASKAP-localised fast radio bursts
• No pulsed radio emission during a bursting phase of a Galactic magnetar
• Non-Cosmological FRBs from Young Supernova Remnant Pulsars
• On the FRB luminosity function -- II. Event rate density
• Polarimetry of 600 pulsars from observations at 1.4 GHz with the Parkes radio telescope
• The magnetar 1E 1547.0-5408: radio spectrum, polarimetry, and timing
• The Commensal Real-time ASKAP Fast Transients (CRAFT) survey
• Detection of two bright radio bursts from magnetar SGR 1935+2154
• Faint Repetitions from a Bright Fast Radio Burst Source
• Rotation Measure Evolution of the Repeating Fast Radio Burst Source FRB 121102
• Spectropolarimetric analysis of FRB 181112 at microsecond resolution: Implications for Fast Radio Burst emission mechanism
• Radio emission evolution, polarimetry and multifrequency single pulse analysis of the radio magnetar PSR J1622-4950
• Extremely band-limited repetition from a fast radio burst source
• Detection of Repeating FRB 180916.J0158+65 Down to Frequencies of 300 MHz
• On the Time-Frequency Downward Drifting of Repeating Fast Radio Bursts
• Polarization Changes of Pulsars due to Wave Propagation Through Magnetospheres
• A polarized fast radio burst at low Galactic latitude
• On the mean profiles of radio pulsars I: Theory of the propagation effects
• Polarized radio emission from the magnetar XTE J1810-197
• A comparative study of host galaxy properties between Fast Radio Bursts and stellar transients
• Wideband polarized radio emission from the newly revived magnetar XTE J1810$-$197
• Fast radio bursts from activities of neutron stars newborn in BNS mergers: offset, birth rate and observational properties
• Pair separation in parallel electric field in magnetar magnetosphere and narrow spectra of fast radio bursts
• The SUrvey for Pulsars and Extragalactic Radio Bursts III: Polarization properties of FRBs 160102 & 151230
• DSA-10: A Prototype Array for Localizing Fast Radio Bursts
• CRAFTS for Fast Radio Bursts Extending the dispersion-fluence relation with new FRBs detected by FAST
• Faraday conversion and magneto-ionic variations in Fast Radio Bursts
• Conversion Measure of Faraday Rotation-Conversion with application to Fast Radio Bursts
• Peculiar Spin Frequency and Radio Profile Evolution of PSR J1119$-$6127 Following Magnetar-like X-ray Bursts
• Spectropolarimetric properties of Swift J1818.0$-$1607: a 1.4 s radio magnetar
• A Fast Radio Burst discovered in FAST drift scan survey
• On the magnetospheric origin of Repeating Fast Radio Bursts
• Evidence for magnetospheric effects on the radiation of radio pulsars
• The NANOGrav 11-Year Data Set: Arecibo Observatory Polarimetry And Pulse Microcomponents
• Fast radio burst source properties from polarization measurements
• The FRB-SGR Connection
• Rotating vector model for magnetars
• Repeating fast radio bursts caused by small bodies orbiting a pulsar or a magnetar
• Circular polarization in radio pulsar PSR B1451-68: coherent mode transitions and intrabeam interference
• FRB 171019: An event of binary neutron star merger?
• Source of circular polarization in radio pulsars
• FRB 121102: a star quake-induced repeater?

Cited by in corpus (10)

• The Physics of Fast Radio Bursts
• Frequency-dependent polarization of repeating fast radio bursts-implications for their origin
• Magnetospheric curvature radiation by bunches as emission mechanism for repeating fast radio bursts
• Circularly polarized radio emission from the repeating fast radio burst source FRB 20201124A
• Polarization of Fast Radio Bursts: radiation mechanisms and propagation effects
• Ninety percent circular polarization detected in a repeating fast radio burst
• The Statistical Polarization Properties of Coherent Curvature Radiation by Bunches: Application to Fast Radio Burst Repeaters
• Circular polarization of fast radio bursts in the curvature radiation scenario
• System equivalent flux density of Stokes I, Q, U, V of a polarimetric interferometer
• Circular polarization of fast radio bursts by asymmetric erosion in longitudinally magnetized plasma