FRB 190520B embedded in a magnetar wind nebula and supernova remnant: luminous persistent radio source, decreasing dispersion measure and large rotation measure

Abstract

Recently, FRB 190520B with the largest extragalactic dispersion measure (DM), was discovered by the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The DM excess over the intergalactic medium and Galactic contributions is estimated as $\sim 900$ pc cm${}^{-3}$, which is nearly ten times higher than other fast radio bursts (FRBs) host galaxies. The DM decreases with the rate $\sim 0.1$ pc cm${}^{-3}$ per day. It is the second FRB associated with a compact persistent radio source (PRS). The rotation measure (RM) is found to be larger than $1.8\times 10^5\mathrm{rad}{\mathrm{m}}^{-2}$. In this letter, we argue that FRB 190520B is powered by a young magentar formed by core-collapse of massive stars, embedded in a composite of magnetar wind nebula (MWN) and supernova remnant (SNR). The energy injection of the magnetar drives the MWN and SN ejecta to evolve together, and the PRS is generated by the synchrotron radiation of the MWN. The magnetar has the interior magnetic field $B_{\text{int}}\sim (2-4)\times 10^{16}$ G and the age $t_{\text{age}}\sim 14-22$ yr. The dense SN ejecta and the shocked shell contribute a large fraction of the observed DM and RM. Our model can naturally explain the luminous PRS, decreasing DM and extreme RM of FRB 190520B simultaneously.

12 pages, 5 figures, accepted for publication in the ApJ Letters, references added

References in corpus (14)

• A bright millisecond radio burst of extragalactic origin
• The direct localization of a fast radio burst and its host
• The Repeating Fast Radio Burst FRB 121102 as Seen on Milliarcsecond Angular Scales
• The Physical Mechanisms of Fast Radio Bursts
• A bimodal burst energy distribution of a repeating fast radio burst source
• The Physics of Fast Radio Bursts
• Gamma-Ray and Hard X-Ray Emission from Pulsar-Aided Supernovae as a Probe of Particle Acceleration in Embryonic Pulsar Wind Nebulae
• Dispersion Measure Variation of Repeating Fast Radio Burst Sources
• A Search for Late-Time Radio Emission and Fast Radio Bursts from Superluminous Supernovae
• ALMA and NOEMA constraints on synchrotron nebular emission from embryonic superluminous supernova remnants and radio-gamma-ray connection
• Radio emission from a decade old Type I superluminous supernova, PTF10hgi: Comparison with FRB121102
• The Environment of FRB 121102 and Possible Relation to SGR/PSR J1745-2900
• Emission from a Pulsar Wind Nebula: Application to the Persistent Radio Counterpart of FRB 121102
• Persistent Radio Emission from Synchrotron Heating by a Repeating Fast Radio Burst Source in a Nebula

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