Developing an understanding of how magnetic fields can become entangled in a prominence is important for predicting a possible eruption. This work investigates the kinetic energy and vorticity associated with plasma motion residing inside quiescent prominences (QPs). These plasma flow characteristics can be utilized to improve our understanding of how the prominence maintains a stable magnetic field configuration. Three different contrast-enhanced solar prominence observations from Hinode/Solar Optical Telescope were used to construct velocity maps—in the plane of the sky—via a Fourier local correlation tracking program. The resulting velocities were then used to perform the first-ever analysis of the two-dimensional kinetic energy and enstrophy spectra of a prominence. Enstrophy is introduced here as a means of quantifying the vorticity that?has been observed in many QPs. The kinetic energy power spectral density (PSD) produced indices ranging from ?1.00 to ?1.60. There was a consistent anisotropy in the kinetic energy spectrum of all three prominences examined. Examination of the intensity PSD reveals that?a different scaling relationship exists between the observed prominence structure and velocity maps. All of the prominences exhibited an inertial range of at least . Quasi-periodic oscillations were also detected in the centroid of the velocity distributions for one prominence. Additionally, a lower limit was placed on the kinetic energy density ( ~ 0.22–7.04 ) and enstrophy density (ω ~ 1.43–13.69 ) associated with each prominence.
展开▼
机译：了解磁场如何在突起中纠缠起来对于预测可能的爆发很重要。这项工作调查与静态突出（QPs）内的血浆运动相关的动能和涡度。这些等离子体流动特性可用于增进我们对突起如何保持稳定磁场配置的理解。通过傅立叶局部相关跟踪程序，使用了来自Hinode / Solar Optical Telescope的三个不同的对比增强的太阳突出观测资料，用于在天空平面中构造速度图。然后将所得的速度用于对突出的二维动能和涡旋谱进行首次分析。引入熵是一种量化在许多QP中观测到的涡度的方法。动能功率谱密度（PSD）产生的指数范围为？1.00至？1.60。在所有三个突出的动能谱中都有一个一致的各向异性。强度PSD的检查揭示了在观察到的突出结构和速度图之间存在不同的比例关系。所有的突起都显示出至少的惯性范围。在速度分布的质心处也检测到准周期振荡，一个突出。此外，与每个突出相关的动能密度（〜0.22–7.04）和涡旋密度（ω〜1.43–13.69）设置了下限。
展开▼
