首页|The Nature of the Elongated Granulations and Stretched Dark Lanes in a Newly Emerging Flux Region
The Nature of the Elongated Granulations and Stretched Dark Lanes in a Newly Emerging Flux Region
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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.
Sun:granulationSun:magnetic fieldsSun:photosphere
Jincheng Wang、Xiaoli Yan
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Yunnan Observatories,Chinese Academy of Sciences,Kunming 650011,China
Yunnan Key Laboratory of Solar Physics and Space Science,Kunming 650011,China
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