FRB 190520B -- A FRB in a Supernova Remnant?

Abstract

FRB 190520B, a repeating FRB near-twin of FRB 121102, was discovered \citep{N21} to have a dispersion measure excess over the intergalactic and Galactic contributions of about 900 pc-cm${}^{-3}$, attributable to its host galaxy or near-source environment. This excess varies on a time scale of $\sim 30$y and might be explained by a supernova remnant no more than a few decades old. A magnetic field in equipartition with the remnant's expansion would be $\mathcal{O}(1\text{G})$. I suggest the use of baseband data to measure very large rotation measures.

arXiv comment4 pp Added discussion of use of baseband data to measure very large FRB rotation measures

References in corpus (15)

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Cited by in corpus (7)

• Temporal Scattering, Depolarization, and Persistent Radio Emission from Magnetized Inhomogeneous Environments Near Repeating Fast Radio Burst Sources
• Finding the missing baryons in the intergalactic medium with localized fast radio bursts
• Rotation Measure Variations and Reversals of Repeating Fast Radio Bursts in Massive Binary Systems
• An extremely active repeating fast radio burst source in a likely non-magneto-ionic environment
• Multi-year Polarimetric Monitoring of Four CHIME-Discovered Repeating Fast Radio Bursts with FAST
• Fast Radio Bursts
• Quasi-steady emission from repeating fast radio bursts can be explained by magnetar wind nebulae