场取向超半影纤维的He I矢量磁测量
He I Vector Magnetometry of Field Aligned Superpenumbral Fibrils
摘要：
在10830埃的中性氦三重态中，原子级极化和塞曼效应诊断原则上允许精细尺度色球纤维的全矢量磁力测量。我们提出了高分辨率的光谱偏振观测的superpenumbral纤维在He I三重态与足够的偏振灵敏度，以推断其完整的磁场几何形状。He I从设施红外分光偏振仪（FIRS）的观测与高分辨率的观测Halpha 6563埃和Ca II 8542埃谱线从干涉二维光谱仪（IBIS）从邓恩太阳望远镜在新墨西哥州配对。线性和圆偏振签名在他我三重测量和描述，以及分析与先进的反演能力的“汉勒和塞曼光”（HAZEL）建模代码。我们的分析提供了直接的证据，经常假设的场排列的原纤维结构。原纤维的投影角和推断的磁场几何形状在正负10度的误差内对齐。我们描述了这些功能，反映其与光球磁场的连通性的倾斜角的变化。在强黑子和弱斑斑的端点处，沿着单个纤维锚定的加速流（约40 m/s^2）的证据在一定程度上支持了磁虹吸流机制在逆埃弗谢德效应中的作用。然而，许多原纤维的外端点的连接性无法建立。
英文摘要：
Atomic-level polarization and Zeeman effect diagnostics in the neutral helium triplet at 10830 angstroms in principle allow full vector magnetometry of fine-scaled chromospheric fibrils. We present high-resolution spectropolarimetric observations of superpenumbral fibrils in the He I triplet with sufficient polarimetric sensitivity to infer their full magnetic field geometry. He I observations from the Facility Infrared Spectropolarimeter (FIRS) are paired with high-resolution observations of the Halpha 6563 angstroms and Ca II 8542 angstroms spectral lines from the Interferometric Bidimensional Spectrometer (IBIS) from the Dunn Solar Telescope in New Mexico. Linear and circular polarization signatures in the He I triplet are measured and described, as well as analyzed with the advanced inversion capability of the "Hanle and Zeeman Light" (HAZEL) modeling code. Our analysis provides direct evidence for the often assumed field alignment of fibril structures. The projected angle of the fibrils and the inferred magnetic field geometry align within an error of plus or minus 10 degrees. We describe changes in the inclination angle of these features that reflect their connectivity with the photospheric magnetic field. Evidence for an accelerated flow (approx 40 m/s^2) along an individual fibril anchored at its endpoints in the strong sunspot and weaker plage in part supports the magnetic siphon-flow mechanism's role in the inverse Evershed effect. However, the connectivity of the outer endpoint of many of the fibrils cannot be established.
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