论文标题
中子恒星中的弹性外壳维持的强弹性磁场
Strong toroidal magnetic fields sustained by the elastic crust in a neutron star
论文作者
论文摘要
我们研究了磁性水力动力学（MHD）平衡和磁弹性外壳中具有正压芯的磁化中子恒星的新溶液，这是先前关于MHD平衡中恒星的研究忽略的。正压恒星的洛伦兹力纯粹是无关的，磁场的结构受到限制。相比之下，洛伦兹力的螺旋螺旋成分存在于弹性地壳中，磁场的结构受到较少的限制。我们发现，弹性外壳中的次要螺线管成分对于维持芯中的强磁场很重要。与以前的研究不同，环形磁场存在于核心的整个区域中，并且我们获得具有较大环形磁场的平衡状态，其中环形磁能大于poloidal磁能。地壳的弹性力的固定级别为$ 10^{15}〜\ mathrm {g} $螺旋磁场，并且环形磁场的最大强度与外壳厚度大致成正比。
We investigate new solutions for magnetized neutron stars with a barotropic core in magnetohydrodynamic (MHD) equilibrium and a magneto-elastic crust, which was neglected by previous studies concerning stars in MHD equilibrium. The Lorentz force of the barotropic star is purely irrotational and the structures of magnetic fields are constrained. By contrast, a solenoidal component of the Lorentz force exists in the elastic crust and the structures of the magnetic fields are less restricted. We find that the minor solenoidal component in the elastic crust is important for sustaining the strong magnetic field in the core. Unlike previous studies, the toroidal magnetic field exists in the entire region of the core, and we obtain equilibrium states with large toroidal magnetic fields, where the toroidal magnetic energy is larger than the poloidal magnetic energy. The elastic force of the crust sustains an order of $10^{15}~\mathrm{G}$ toroidal magnetic field in the core, and the maximum strength of the toroidal magnetic field is approximately proportional to the crust thickness.
