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arXiv 2201.03723astro-ph.HE
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FRB 191001是否嵌入超新星遗迹中?

Is FRB 191001 embedded in a supernova remnant?

Esha Kundu

摘要:

快速射电暴(FRB)191001位于一个恒星形成率很高的星系的旋臂上,观测到的色散测量值(DM)为507 pc cm $^{-3}$。从总DM中减去星系际介质和我们银河系的贡献,我们得到大约200 pc cm $^{-3}$的多余部分,这可能是由FRB的宿主星系贡献的。发现FRB 191001的位置与超新星在其母星系旋臂中的分布一致。如果这一事件确实是由于SN爆炸,那么,从SN的贡献过量DM的分析,核心崩溃(CC)通道是首选热核失控。对于CC爆炸,取决于周围介质的密度,为无线电爆发提供动力的中心引擎的年龄在几年到几十年之内。然而,观测到的FRB 191001的旋转测量并不能证实射电暴已经穿过年轻SN的残余。

英文摘要:

Fast radio burst (FRB) 191001 is localised at the spiral arm of a highly star-forming galaxy with an observed dispersion measure (DM) of 507 pc cm$^{-3}$. Subtracting the contributions of the intergalactic medium and our Milky Way Galaxy from the total DM, one gets an excess of around 200 pc cm$^{-3}$, which may have been contributed by the host galaxy of the FRB. It is found in this work that the position of FRB 191001 is consistent with the distribution of supernovae (SNe) in the spiral arm of their parent galaxies. If this event is indeed due to an SN explosion, then, from the analysis of the SN contributions to the excess DM, a core-collapse (CC) channel is preferred over a thermonuclear runaway. For the CC explosion, depending on the density of the surrounding medium, the age of the central engine that powers the radio burst is within a couple of years to a few decades. However, the observed rotation measure of FRB 191001 does not confirm the fact that the radio burst has passed through the remnant of a young SN.

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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