太阳黑子半影区IV的结构。半影通量管的MHS平衡和暗核半影丝和半影颗粒的起源
The structure of sunspot penumbrae IV. MHS equilibrium for penumbral flux tubes and the origin of dark core penumbral filaments and penumbral grains
摘要：
本文研究了埋在磁性大气中的圆形截面磁通量管的磁流体静力平衡。我们在2.5D中求解静态动量方程，获得与指定速度和磁场一致的热力学。我们表明，力的平衡是大致满意的，如果磁通管的磁场是与其轴对齐。如果该磁场具有横向分量，则保证平衡。这种横向场的几种形式进行了研究。由此产生的磁场配置严格审查的光谱偏振观测的结果。还计算了使磁通管处于机械平衡的热力学结构。我们发现，推断的压力，密度和温度分层再现强度功能类似于暗核半影丝和半影颗粒。
英文摘要：
We study the magnetohydrostatic equilibrium of magnetic flux tubes with circular cross sections embedded in a magnetic surrounding atmosphere. We solve the static momentum equation in 2.5D to obtain the thermodynamics that are consistent with a prescribed velocity and magnetic fields. We show that force balance is roughly satisfied if the flux tube's magnetic field is aligned with its axis. Equilibrium is guaranteed if this magnetic field possesses a transverse component. Several forms of this transverse field are investigated. The resulting magnetic field configurations are critically reviewed in terms of the results from spectropolarimetric observations. The thermodynamic structure that allows the flux tube to be in mechanical equilibrium is also calculated. We show that the inferred pressure, density and temperature stratification reproduce intensity features similar to dark core penumbral filaments and penumbral grains.
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