新生磁流区中拉长米粒组织与拉伸暗条的本质
The nature of elongated granulations and stretched dark lanes in a newly emerging flux region
AI总结：
本研究针对新生磁流区的拉长米粒与拉伸暗条，通过高分辨率观测分析其磁场、运动学特征，揭示二者分别对应浮现磁流管间隙与管体的本质。
摘要：
本研究探究了浮现的反黑尔活动区NOAA 12720内的拉长米粒组织与拉伸暗条。利用新真空太阳望远镜的高分辨率观测数据，我们识别出大量拉长米粒与拉伸暗条，它们与两个主要相反磁极性之间新磁通量的浮现相关。这些拉长米粒与拉伸暗条呈现出强横向磁场的取向一致性，且具有显著的倾角。这些结构的端点彼此分离，其中点在光球层主要表现为蓝移信号，表明拉长米粒与拉伸暗条和新生磁通量密切相关。此外，我们发现与拉长米粒相比，拉伸暗条与强蓝移及光球横向磁场的相关性更显著。这些拉伸暗条内的横向磁场强度约为300至400 G，倾角沿拉伸暗条的轨迹呈现“拱状”模式。基于这些观测特征，我们推断沿拉伸暗条存在一个呈“拱状”形态的浮现磁流管。据此我们得出结论：拉伸暗条很可能是浮现磁流管的表现形式，而拉长米粒则可能对应于浮现磁流管之间的间隙。
英文摘要：
In this study, we explore the elongated granulations and stretched dark lanes within the emerging anti-Hale active region NOAA 12720. Utilizing high-resolution observations from the New Vacuum Solar Telescope, we discern a prevalence of elongated granules and stretched dark lanes associated with the emergence of new magnetic flux positioned between two primary opposing magnetic polarities. These elongated granulations and stretched dark lanes exhibit an alignment of strong transverse fields and a significant inclination angle. The endpoints of these features separate from each other, with their midpoints predominantly characterized by blue-shifted signals in the photosphere. This suggests a close association between elongated granules and stretched dark lanes with the newly emerging flux. Additionally, we find that the stretched dark lanes display a more pronounced correlation with strong blue shifts and photospheric transverse magnetic fields compared to the elongated granulations. The transverse magnetic field within these stretched dark lanes reaches magnitudes of approximately 300 to 400 G, and the inclination angle demonstrates an "arch-like" pattern along the trajectory of the stretched dark lane. Based on these observed characteristics, we infer the presence of an emerging flux tube with an "arch-like" shape situated along the stretched dark lane. Consequently, we conclude that the stretched dark lanes likely represent manifestations of the emerging flux tube, while the elongated granulations may correspond to the gaps between the emerging flux tubes.
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