Modelling Annual Scintillation Velocity Variations of FRB 20201124A

Abstract

Compact radio sources exhibit scintillation, an interference pattern arising from propagation through inhomogeneous plasma, where scintillation patterns encode the relative distances and velocities of the source, scattering material, and Earth. In previous work, we showed that the scintillation velocity of the repeating fast radio burst FRB20201124A could be measured by correlating burst spectra pairs, with low values of the scintillation velocity and scattering timescale suggesting scattering nearby the Earth at $\sim 0.4$kpc. In this work, we have measured the scintillation velocity at 10 epochs spanning a year, observing an annual variation which strongly implies the screen is within the Milky Way. Modelling the annual variation with a 1D anisotropic or 2D isotropic screen results in a screen distance $d_l=0.40\pm 0.04$kpc or $d_l=0.46\pm 0.06$kpc from Earth respectively, possibly associated with material outside of the Local Bubble or the edge of the Orion-Eridanus Superbubble. Additional measurements particularly at times of low effective velocity will help probe changes in screen properties, and distinguish between screen models. Where scintillation of an FRB originates in its host galaxy or local environment, these techniques could be used to detect orbital motion, and probe the FRB's local ionised environment.

arXiv comment5 pages, 5 Figures, accepted in MNRAS Letters. Replacement, fixed typo in abstract: 0.4kpc instead of 0.4pc

References in corpus (36)

• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• An extreme magneto-ionic environment associated with the fast radio burst source FRB 121102
• Fast Radio Bursts: An Extragalactic Enigma
• NE2001.I. A New Model for the Galactic Distribution of Free Electrons and its Fluctuations
• Dense magnetized plasma associated with a fast radio burst
• Periodic activity from a fast radio burst source
• Gaia-2MASS 3D maps of Galactic interstellar dust within 3 kpc
• Highest-frequency detection of FRB 121102 at 4-8 GHz using the Breakthrough Listen Digital Backend at the Green Bank Telescope
• A bimodal burst energy distribution of a repeating fast radio burst source
• Possible periodic activity in the repeating FRB 121102
• Star formation near the Sun is driven by expansion of the Local Bubble
• Faint Scattering Around Pulsars: Probing the Interstellar Medium on Solar System Size Scales
• Repeating behaviour of FRB 121102: periodicity, waiting times and energy distribution
• The Brightest Pulses in the Universe: Multifrequency Observations of the Crab Pulsar's Giant Pulses
• Prospects for High-Precision Pulsar Timing with the New Effelsberg PSRIX Backend
• Theory of Parabolic Arcs in Interstellar Scintillation Spectra
• Modeling the magnetized Local Bubble from dust data
• Pulsar Scintillation and the Local Bubble
• Polarization properties of FRB 20201124A from detections with the 100-m Effelsberg Radio Telescope
• Precision orbital dynamics from interstellar scintillation arcs for PSR J0437-4715
• Milliarcsecond localisation of the repeating FRB 20201124A
• Nested shells reveal the rejuvenation of the Orion-Eridanus superbubble
• Constraining Galaxy Haloes from the Dispersion and Scattering of Fast Radio Bursts and Pulsars
• Interstellar Scintillation of the Double Pulsar J0737$-$3039
• A Scintillation Arc Survey of 22 Pulsars with Low to Moderate Dispersion Measures
• Modelling annual scintillation arc variations in PSR J1643-1224 using the Large European Array for Pulsars
• Scintillation timescale measurement of the highly active FRB20201124A
• Double-lens Scintillometry: The variable scintillation of pulsar B1508+55
• A broadband radio study of the average profile and giant pulses from PSR B1821-24A
• Orion A's complete 3D magnetic field morphology
• Probing the local interstellar medium with scintillometry of the bright pulsar B1133+16
• Scattering variability detected from the circumsource medium of FRB 20190520B
• Burst properties of the highly active FRB 20201124A using uGMRT
• Discovery and modelling of broad-scale plasma lensing in black-widow pulsar J2051$-$0827
• Resolving the emission regions of the Crab pulsar's giant pulses
• Magnetic Field Reversal around an Active Fast Radio Burst

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