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首页> 外文期刊>The Astrophysical journal >LARGE-SCALE SOLAR CORONAL STRUCTURES IN SOFT X-RAYS AND THEIR RELATIONSHIP TO THE MAGNETIC FLUX
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LARGE-SCALE SOLAR CORONAL STRUCTURES IN SOFT X-RAYS AND THEIR RELATIONSHIP TO THE MAGNETIC FLUX

机译：X射线中的大型日冕结构及其与磁通量的关系

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摘要

We have investigated the relationship between magnetic activity and coronal structures using soft X-ray data from the Yohkoh soft X-ray telescope and magnetic field data from the Kitt Peak Solar Observatory for the period of 1991-2001 and EUV data from the Solar and Heliospheric Observatory EUV Imaging Telescope for 1996-2001. The data are reduced to Carrington synoptic maps, which reveal two types of migrating structures of coronal activity at low and high latitudes in the time-latitudinal distribution. The low-latitude coronal structures, migrating equatorward, correspond to photospheric sunspot activity, and the high-latitude structures migrating toward the poles reflect polar activity of the Sun. We present the following new results: 1. The migrating high-latitude coronal magnetic structures are revealed in the soft X-ray data as complete bright giant loops connecting the magnetic field of the following part of active regions with the polar field. They appear during the rising phase and maximum of the solar cycle and show quasi-periodic impulsive variations with a 1-1.5 yr period. 2. The soft X-ray intensity of these loops has a strong power-law correlation with the photospheric magnetic flux. The power-law index, which on average is close to 2, shows variations with the solar cycle: it is higher for the period of the declining phase and minimum of solar activity than for the rising phase and maximum.
机译：我们使用Yohkoh软X射线望远镜的软X射线数据和1991-2001年期间基特峰太阳观测台的磁场数据以及太阳和日球层的EUV数据研究了磁活动与日冕结构之间的关系。 1996-2001年天文台EUV成像望远镜。数据被简化为卡灵顿天气概况图，该图揭示了时空分布中低纬度和高纬度两种冠状活动的迁移结构。向赤道方向迁移的低纬度日冕结构对应于光层黑子的活动，向两极迁移的高纬度结构反映了太阳的极性活动。我们提出以下新结果：1.迁移的高纬度日冕磁结构在软X射线数据中显示为完整的明亮巨型环路，将活动区域以下部分的磁场与极性场连接起来。它们出现在上升阶段和太阳周期的最大值，并且在1-1.5年期间显示出准周期的脉冲变化。 2.这些回路的软X射线强度与光层磁通量具有很强的幂律相关性。幂律指数平均接近2，显示出随太阳周期的变化：在下降阶段和太阳活动最小的期间，它比上升阶段和最大活动周期的高。

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