Pulsar magnetospheric convulsions induced by an external magnetic field
Pulsar magnetospheric convulsions induced by an external magnetic field
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外部磁场引起的脉冲星磁层震动
DOI：
10.1051/0004-6361/201629254
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发表时间：
2017-01
影响因子：
6.5
通讯作者：
Fan Zhang
中科院分区：
文献类型：
--
作者：
Fan Zhang
规范脉冲星磁层包含一个闭合磁场线气泡，该气泡通过电流片与开放磁力线分开，并且此类片的不同分支在光柱（LC）上的临界线处相交。 LC 远离中子星，该位置脉冲星的固有磁场比通常引用的适用于星体表面的数字弱得多。存在于星系核中的超大质量黑洞周围的磁场具有相当或更大的强度。因此，当脉冲星在这些区域内行进时，电流片会受到不可忽略的洛伦兹力，这往往会在临界线处将它们拉开。当破裂发生时，不稳定性随之而来，导致气泡破裂，使封闭的磁力线突然打开并释放大量电磁能，足以为快速无线电爆发（FRB）提供动力。这一过程必然与强磁场环境相关，因此可以解释快速射电暴记录的大自转测量。我们勾画出该过程的概况，并检查其与快速射电暴的其他几个显着特征的兼容性。
The canonical pulsar magnetosphere contains a bubble of closed magnetic field lines that is separated from the open lines by current sheets, and different branches of such sheets intersect at a critical line on the light cylinder (LC). The LC is located far away from the neutron star, and the pulsar's intrinsic magnetic field at that location is much weaker than the commonly quoted numbers applicable to the star surface. The magnetic field surrounding supermassive black holes that reside in galactic nuclei is of comparable or greater strength. Therefore, when the pulsar travels inside such regions, a non-negligible Lorentz force is experienced by the current sheets, which tends to pull them apart at the critical line. As breakage occurs, instabilities ensue that burst the bubble, allowing closed field lines to snap open and release large amounts of electromagnetic energy, sufficient to power fast radio bursts (FRBs). This process is necessarily associated with an environment of a strong magnetic field and thus might explain the large rotation measures recorded for the FRBs. We sketch a portrait of the process and examine its compatibility with several other salient features of the FRBs.
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DOI：
10.1142/s0217732316300135
发表时间：
2016-04
期刊：
arXiv: High Energy Astrophysical Phenomena
影响因子：
--
作者：
Jonathan I. Katz
通讯作者：
Jonathan I. Katz
DOI：
10.3847/2041-8205/821/2/l22
发表时间：
2016-02
期刊：
The Astrophysical Journal Letters
影响因子：
--
作者：
P. G. Williams;E. Berger
通讯作者：
P. G. Williams;E. Berger
DOI：
10.3847/0004-637x/818/1/19
发表时间：
2015-05
期刊：
The Astrophysical Journal
影响因子：
--
作者：
J. Katz
通讯作者：
J. Katz
影响因子：
5
作者：
V. Ferrari;L. Gualtieri;F. Pannarale
通讯作者：
V. Ferrari;L. Gualtieri;F. Pannarale
DOI：
10.1086/341425
发表时间：
2002-01
期刊：
The Astrophysical Journal
影响因子：
--
作者：
E. Quataert
通讯作者：
E. Quataert