Overview of the Solar Activity During Solar Cycle 23
Overview of the Solar Activity During Solar Cycle 23
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DOI：
10.1007/s11207-006-1112-3
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发表时间：
2006
期刊：
影响因子：
2.8
通讯作者：
T. Ataç;A. Özgüç
中科院分区：
文献类型：
--
作者：
T. Ataç;A. Özgüç
本文给出了1996年1月1日至2003年12月31日第23周期太阳活动的耀斑指数和其他一些指数的简要描述和最终结果。发现有足够的证据支持当前的周期是弱磁的。比较了第23周期不同物理条件下出现的类似活动指数与耀斑指数的变化规律。与第22周期的最大值相比，第23周期的最大值和光球磁通量和耀斑活动非常低。在此周期内，主要耀斑的产生非常低，而在当前周期的上升期和极大期，安静地磁条件非常高。研究了日冕物质抛射的南北不对称性、黑子数量、黑子面积和耀斑指数。在第23太阳活动周，南北向不对称性增加，有利于南半球。利用傅里叶变换计算了南北半球和全圆盘日耀斑指数数据的中期周期，发现在太阳活动周期23的最大阶段，周期分别为64、83和125天。
A brief description and final results of the flare index and some other indices of solar activity for cycle 23 from January 1, 1996 to December 31, 2003 are given. It is found that there is enough evidence to support that the present cycle is magnetically weak. The patterns of similar activity indices that arise under different physical conditions during cycle 23 were compared with the flare index. The photospheric magnetic flux and flare activity show very low values at the maximum of cycle 23 compared with the maximum phase of cycle 22. The major flare production during this cycle is very low while the quiet geomagnetic conditions are remarkably high during the rising and the maximum phase of the current cycle. The north–south asymmetry of CMEs, sunspot number, sunspot area, and flare index were studied. N–S asymmetry had increased in favor of the southern hemisphere for solar cycle 23 after the inverse polarities were installed. The intermediate-term periodicities in the daily flare index data for the northern and the southern hemispheres and full disc were calculated using the Fourier transform, and it was found that 64, 83, and 125 days periodicities are in operation during the maximum phase of the solar cycle 23.