Using full three-dimensional magnetohydrodynamic numerical simulations, we study the effects of magnetic field sigmoidity or helicity on the properties of the fundamental kink oscillation of solar coronal loops. Our model consists of a single denser coronal loop, embedded in a plasma with dipolar force-free magnetic field with a constant α -parameter. For the loop with no sigmoidity, we find that the numerically determined oscillation period of the fundamental kink mode matches the theoretical period calculated using WKB theory. In contrast, with increasing sigmoidity of the loop, the actual period is increasingly smaller than the one estimated by WKB theory. Translated through coronal seismology, increasing sigmoidity results in magnetic field estimates that are increasingly shifting toward higher values, and even surpassing the average value for the highest α value considered. Nevertheless, the estimated range of the coronal magnetic field value lies within the mi...

中文翻译：

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乙状结肠日冕环中的驻结扭摆波：对日冕地震学的影响

使用完整的三维磁流体动力学数值模拟，我们研究了磁场S形或螺旋形对太阳日冕环基本扭折振荡特性的影响。我们的模型由单个密集的冠状环组成，该环嵌入在具有恒定α参数的无偶极力磁场的等离子体中。对于没有S形的环路，我们发现通过数值确定的基本扭结模式的振荡周期与使用WKB理论计算的理论周期匹配。相反，随着循环的S形增加，实际周期越来越小于WKB理论估计的周期。通过冠状地震学翻译，S形的增加会导致磁场估计值越来越趋向更高的值，甚至超过所考虑的最高α值的平均值。尽管如此，冠状磁场值的估计范围仍在...