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arXiv 1701.05482astro-ph.HEastro-ph.GA
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可能与FRB 121102有关的磁星年龄的限制

Constraining the age of a magnetar possibly associated with FRB 121102

Xiao-Feng Cao, Yun-Wei Yu, Zi-Gao Dai

摘要:

FRB 121102的宿主星系与长伽马射线暴和I型超亮超新星的相似性表明,这个FRB可能与年轻的磁星有关。通过假设FRB发射产生的磁层内,我们得出的磁星的年龄下限,GHz的发射后,能够自由地逃离稠密的相对论风的磁星。另一个下限是通过要求由电子/正电子对风贡献的色散测量与宿主星系的观测结果一致来获得的。此外,我们还讨论了FRB辐射的可能能量来源和最近发现的持续射电对应物,从而得出了磁星年龄的上限。其结果是,一些模型参数的约束,解决了调和的下限与可能的上限,得出与旋转能源的假设。

英文摘要:

The similarity of the host galaxy of FRB 121102 with those of long gamma-ray bursts and Type I super-luminous supernovae suggests that this FRB could be associated with a young magnetar. By assuming the FRB emission to be produced within the magnetosphere, we derive a lower limit on the age of the magnetar, after which GHz emission is able to escape freely from the dense relativistic wind of the magnetar. Another lower limit is obtained by requiring the dispersion measure contributed by the electron/positron pair wind to be consistent with the observations of the host galaxy. Furthermore, we also derive some upper limits on the magnetar age with discussions on possible energy sources of the FRB emission and the recently-discovered persistent radio counterpart. As a result, some constraints on model parameters are addressed by reconciling the lower limits with the possible upper limits that are derived with an assumption of rotational energy source.

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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