arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.11281astro-ph.HE
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磁星爆发和自旋下降故障

Magnetar outburst and spin-down glitch

H. Tong, L. Huang

摘要:

从磁层的角度模拟了磁星的爆发和自旋下降故障。我们试图讨论以下四个问题:(1)周期图和裴若导数图上的哪颗脉冲星更有可能出现磁星爆发?(2)哪种爆发会使触发爆发的故障变成自旋下降故障?(3)我们能否同时模拟PSR J1119 $-$ 6127中的爆发和自旋下降故障?(4)与1E 1048.1 $-$ 5937和PSR J1119 $-$ 6127中的X射线光度峰值相比,扭矩变化为何延迟?研究发现,无论是整体扭曲磁场还是局部扭曲磁场,都会影响磁星的辐射和时序行为。特别是,扭矩变化的延迟可能是由于增加扭曲的j束和全球磁层的解扭曲的综合效应。建立了磁星爆发和力矩变化的玩具模型。它可以捕捉到磁星爆发的总趋势:磁通量衰减、热点收缩和力矩变化。

英文摘要:

The outburst and spin-down glitch of magnetars are modeled from the magnetospheric point of view. We try to discuss the following four questions: (1) Which pulsar on the period and peirod-derivative diagram are more likely to show magnetar outburst? (2) Which outburst will make the glitch that triggered the outburst to become a spin-down glitch? (3) Can we model the outburst and spin-down glitch in PSR J1119$-$6127 simultaneously? (4) Why the torque variation is delayed compared with the peak of the X-ray luminosity in 1E 1048.1$-$5937 and PSR J1119$-$6127? It is found that both the global and local twisted magnetic field will affect the radiation and timing behaviors of magnetars. Especially, the delay of torque variations may due to the combined effect of increasing twist in the j-bundle and untwisting of the global magnetosphere. A toy model is build for magnetar outburst and torque variations. It can catch the general trend of magnetar outburst: decaying flux, shrinking hot spot, and torque variations.

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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