论文标题
在SGR 1935+2154与FRB 200428相关的距离上，并在SNR G57.2+0.8中托管
On the Distance of SGR 1935+2154 Associated with FRB 200428 and Hosted in SNR G57.2+0.8
论文作者
论文摘要
由于发现了一个非常明亮的快速无线电爆发（FRB）200428与磁铁软伽马射线重复器（SGR）1935+2154相关的硬X射线相关，因此SGR 1935+2154的距离可能在超级Nova Remnant（SNR）G57.2+0.8中托管。 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 $9.0\pm2.5\,$kpc and the SNR radius falls into $10$ to $ 18 \，$ PC，因为本地DM贡献低至$ 0-18 \，$ PC CM $^{ - 3} $。这些结果基本上与先前的研究一致。此外，还对SGR和SNR的FARADAY旋转度量进行了估计。
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 $9.0\pm2.5\,$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.
