AI 中文总结
研究利用 Sunrise III/SCIP 观测宁静太阳区域，发现色球层磁场的线状子结构，揭示冠层磁场具有复杂三维构型，为太阳磁场拓扑提供新约束。
AI 中文摘要
球载平流层太阳观测站 Sunrise III 于 2024 年 7 月成功完成了 6.5 天的观测任务。其焦平面仪器之一的 Sunrise Chromospheric Infrared spectroPolarimeter（SCIP，即太阳色球层红外光谱偏振仪）是一款狭缝扫描式光谱偏振仪，可同时测量 850 nm 和 770 nm 波段多条谱线的全斯托克斯轮廓。SCIP 获得了日面中心附近一块宁静太阳区域的前所未有的数据集，覆盖了 58'' × 58'' 的视场，每个狭缝位置的积分时间为 10 s，扫描在 107 分钟内不间断完成，达到了连续谱水平的 0.03-0.04%（1σ）的极高偏振精度。SCIP 的多波长观测显示，色球层视线（LOS）磁场在网络间区域呈现出线状、细长的结构，其正下方的光球层无明显对应结构；这些线状结构通常窄于 1''，嵌入在从网络区域延伸出的冠层磁场中。通过弱场近似推导得到的视线场强度通常比周围冠层弱 10-20 G，在特别清晰的案例中，这些线状结构的磁极性与相邻冠层相反。这些发现表明，冠层磁场并非简单的源自网络区域的膨胀结构，而是具有包含众多局域子结构的复杂三维构型，该观测为从光球层到色球层的宁静太阳磁场拓扑提供了新的约束条件。
英文摘要
The balloon-borne stratospheric solar observatory Sunrise III successfully completed 6.5 days of observations in July 2024. One of its focal-plane instruments, the Sunrise Chromospheric Infrared spectroPolarimeter (SCIP), is a slit-scanning spectropolarimeter that simultaneously measures full Stokes profiles of multiple spectral lines in the 850 nm and 770 nm bands. SCIP obtained an unprecedented data set of a quiet-sun region near disk center, covering a $58'' \times 58''$ field of view. With an integration time of 10 s per slit position, the scan was completed in 107 minutes without interruption, achieving remarkably stable polarimetric precision of 0.03-0.04% (1$σ$) of the continuum level. The multi-wavelength SCIP observations reveal that the chromospheric line-of-sight (LOS) magnetic field exhibits thread-like, elongated structures over the internetwork regions, with no obvious photospheric counterpart directly below. These threads are typically narrower than $1''$ and are embedded within the canopy fields extending from the network regions. Their LOS field strengths derived from the weak-field approximation are typically 10-20 G weaker than the surrounding canopy. In particularly clear cases, the magnetic polarity of the threads is opposite to that of the adjacent canopy. These findings suggest that the canopy field is not simply an expanding structure originating from network regions, but instead has a complex three-dimensional configuration containing numerous localized substructures. These observations provide new constraints on the quiet-sun magnetic topology from the photosphere to the chromosphere.
Comments11 pages, 5 figures, accepted for publication in ApJL
