Modelling neutron star magnetic fields

Modelling neutron star magnetic fields
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中子星磁场建模

DOI:
10.1093/astrogeo/aty235
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发表时间:
2018
影响因子:
0.8
通讯作者:
Gourgouliatos K
Gourgouliatos K
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Gourgouliatos K

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5.38 A&G· October 2018· Vol. 59· aandg. org由于缓慢的磁场演化而逐渐变形。一旦达到临界应变,地壳就不能再承受应力并迅速释放能量。无论是哪种情况,这些事件最终都是由磁场演化驱动的(邓肯&汤普森1992,汤普森&邓肯1995,1996)。原型磁星具有中子星群体中自旋下降推断的最高偶极表面磁场,其磁场量级为1014-1015 G。然而,最近发现了具有更典型的推断偶极场的磁星,例如,低场磁星的发现,如SGR 0418+ 572,其场仅为6× 1012 G(Rea et al. 2010,2013),与平均脉冲星相当,以及Swift J1822。3− 1606,磁场为1.35× 1013 G(Scholz et al. 2014),挑战了最初的磁星定义,即具有大于量子电动力学场BQ的全局偶极磁场。
5.38 A&G• October 2018• Vol. 59• aandg. org gradually deformed due to slow magnetic field evolution. Once the critical strain is reached, the crust can no longer support the stresses and releases energy rapidly. In either case, these events are ultimately driven by magnetic field evolution (Duncan & Thompson 1992, Thompson & Duncan 1995, 1996).The prototypical magnetars have the highest spin-down-inferred dipolar surface magnetic fields of the neutronstar population, with fields of order 1014–1015 G. Recently, however, magnetars with more typical inferred dipole fields have been found. For example, the discovery of magnetars with low fields, such as SGR 0418+ 572 with a field of only 6× 1012 G (Rea et al. 2010, 2013), comparable to that of an average pulsar, and Swift J1822. 3− 1606 with a field of 1.35× 1013 G (Scholz et al. 2014), challenge the original magnetar definition of having a global dipolar magnetic field greater than the quantum electrodynamic field BQ.
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