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arXiv 2005.11109astro-ph.HE
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关于SGR 1935+2154与FRB 200428的距离以及在SNR G57 .2+0.8中的主持

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

S. Q. Zhong, Z. G. Dai, H. M. Zhang, C. M. Deng

摘要:

由于探测到了一个非常明亮的快速射电暴(FRB)200428,它与来自磁星软伽马射线中继器(SGR)1935 + 2154的硬X射线对应物有关,因此可以重新测量可能存在于超新星遗迹(SNR)G57.2+0.8中的SGR 1935+2154的距离。在SGR和SNR物理相关的假设下,本文通过研究银河系前景介质和本地环境对FRB的色散测度,并结合其他观测约束条件,我们发现SGR 1935+的距离2154结果是$9.0\pm2.5\,$ kpc,SNR半径落入$10$到$18\,$ pc,因为局部DM贡献低至$0-18\,$ pc cm $^{-3}$。这些结果与前人的研究结果基本一致。此外,还对法拉第旋转测度的SGR和SNR进行了估计。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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