The Nature of the Elongated Granulations and Stretched Dark Lanes in a Newly Emerging Flux Region  

作　　者：Jincheng Wang Xiaoli Yan 

机构地区：[1]Yunnan Observatories,Chinese Academy of Sciences,Kunming 650011,China [2]Yunnan Key Laboratory of Solar Physics and Space Science,Kunming 650011,China

出　　处：《Research in Astronomy and Astrophysics》2024年第11期76-84,共9页天文和天体物理学研究（英文版）

基　　金：supported by the National Key R&D Program of China(2019YFA0405000);the Strategic Priority Research Program of the Chinese Academy of Sciences,grant No.XDB0560000;the National Natural Science Foundation of China(NSFC,Grant Nos.12473059,12003064,12325303,11973084,12203020,12203097,12273110,and 12003068);the Yunnan Key Laboratory of Solar Physics and Space Science(202205AG070009);the Yunnan Science Foundation of China under Nos.202301AT070347,202201AT070194,202001AU070077;Yunnan Science Foundation for Distinguished Young Scholars No.202001AV070004;the grant associated with a project of the Group for Innovation of Yunnan province。

摘　　要：In this study,we explore the elongated granulations and stretched dark lanes within the emerging anti-Hale active region NOAA AR 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 blueshifted 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 blueshifts and photospheric transverse magnetic fields compared to the elongated granulations.The transverse magnetic field within these stretched dark lanes reaches magnitudes of approximately 300-400 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.

关 键 词：SUN GRANULATION SUN magnetic fields SUN photosphere 

分 类 号：P111.41[天文地球—天文学]