暗芯半影丝的Hinode矢量偏振光谱法
Vector spectropolarimetry of dark-cored penumbral filaments with Hinode
摘要：
我们目前的分光偏振测量暗芯半影丝采取的Hinode在0.3”的分辨率。我们的观察表明，暗芯灯丝在偏振光中比在连续光强中更为突出。远离盘中心，从这些结构中出现的斯托克斯轮廓是非常不对称的，并显示出沿视线不同倾角的磁场的证据，以及至少6-7 km/s的强烈Evershed流。在太阳黑子接近磁盘中心，暗芯半影丝表现出规则的斯托克斯轮廓与小的不对称性，由于消失的视线组成部分的水平Evershed流。观测到的光谱的反转表明，磁场是较弱的，更倾向于在黑暗的核心相比，周围的明亮的结构。这与暗芯细丝是携带热埃弗谢德流的通量管的表现的想法是一致的。
英文摘要：
We present spectropolarimetric measurements of dark-cored penumbral filaments taken with Hinode at a resolution of 0.3". Our observations demonstrate that dark-cored filaments are more prominent in polarized light than in continuum intensity. Far from disk center, the Stokes profiles emerging from these structures are very asymmetric and show evidence for magnetic fields of different inclinations along the line of sight, together with strong Evershed flows of at least 6-7 km/s. In sunspots closer to disk center, dark-cored penumbral filaments exhibit regular Stokes profiles with little asymmetries due to the vanishing line-of-sight component of the horizontal Evershed flow. An inversion of the observed spectra indicates that the magnetic field is weaker and more inclined in the dark cores as compared with the surrounding bright structures. This is compatible with the idea that dark-cored filaments are the manifestation of flux tubes carrying hot Evershed flows.
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