On the Distance of SGR 1935+2154 Associated with FRB 200428 and Hosted in SNR G57.2+0.8

Abstract

Owing to the detection of an extremely bright fast radio burst (FRB) 200428 associated with a hard X-ray counterpart from the magnetar soft gamma-ray repeater (SGR) 1935+2154, the distance of SGR 1935+2154 potentially hosted in the supernova remnant (SNR) G57.2+0.8 can be revisited. Under the assumption that the SGR and the SNR are physically related, in this Letter, by investigating the dispersion measure (DM) of the FRB contributed by the foreground medium of our Galaxy and the local environments and combining with other observational constraints, we find that the distance of SGR 1935+2154 turns out to be $9.0\pm 2.5$kpc and the SNR radius falls into $10$ to $18$pc since the local DM contribution is as low as $0-18$pc cm${}^{-3}$. These results are basically consistent with the previous studies. In addition, an estimate for the Faraday rotation measure of the SGR and SNR is also carried out.

7 pages, 3 figures (replotted), an uncertainty analysis of the distance estimate has been added, accepted for publication in ApJ Letters

References in corpus (7)

• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• Radio observational constraints on Galactic 3D-emission models
• On The Intrinsic Diversity of Type II-Plateau Supernovae
• Dispersion Measure Variation of Repeating Fast Radio Burst Sources
• Radio continuum and polarization study of SNR G57.2+0.8 associated with magnetar SGR1935+2154
• Constraining models of the large scale Galactic magnetic field with WMAP5 polarization data and extragalactic Rotation Measure sources
• Revisiting the dispersion measure of fast radio bursts associated with gamma-ray burst afterglows

Cited by in corpus (2)

• FRB 200428: an Impact between an Asteroid and a Magnetar
• Constraining the X-ray - Infrared spectral index of second-timescale flares from SGR1935+2154 with Palomar Gattini-IR