arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2412.08910astro-ph.SR
收藏

太阳过渡区的长期演化

The Long-term Evolution of the Solar Transition Region

W. Q. Chen, K. J. Li, J. C. Xu

AI总结:

针对太阳过渡区长期演化特征不明的问题,研究利用SDO/AIA 304 Å波段12年的全日面观测图像开展分析,发现过渡区不同成分的长期变化与太阳活动周期的相位关系不同,并从不同类型磁场加热的角度给出了解释。

摘要:

太阳过渡区的长期演化特征一直尚不明确。本研究利用2011年1月1日至2022年12月31日期间Solar Dynamics Observatory(太阳动力学天文台)/Atmospheric Imaging Assembly(大气成像组件)在304 Å波段的观测得到的太阳全日面日图像,来探究太阳过渡区的长期演化。研究发现,全日面过渡区的长期变化与太阳活动周期同相位,因此极区增亮应当出现在太阳活动周期的极大期。研究还发现,中低纬度背景过渡区的长期变化很可能与太阳活动周期反相位。据推断,整个过渡区,尤其是活动过渡区,主要由活动区磁场和暂现区磁场加热,而较宁静的过渡区被认为主要由网络磁场加热。太阳表面各类磁场的长期演化特征与这些发现高度一致,从而为其提供了解释。

英文摘要:

Long-term evolution characteristics of the solar transition region have been unclear. In this study, daily images of the solar full disk derived from the observations by the Solar Dynamics Observatory/Atmospheric Imaging Assembly at 304 A wavelength from 2011 January 1 to 2022 December 31 are used to investigate long-term evolution of the solar transition region. It is found that long-term variation in the transition region of the full disk is in phase with the solar activity cycle, and thus the polar brightening should occur in the maximum epoch of the solar cycle. Long-term variation of the background transition region is found to be likely in anti-phase with the solar activity cycle at middle and low latitudes. The entire transition region, especially the active transition region is inferred to be mainly heated by the active-region magnetic fields and the ephemeral-region magnetic fields, while the quieter transition region is believed to be mainly heated by network magnetic fields. Long-term evolution characteristics of various types of the magnetic fields at the solar surface are highly consistent with these findings, and thus provide an explanation for them.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑