SOLAR ACTIVE LONGITUDES FROM KODAIKANAL WHITE-LIGHT DIGITIZED DATA
SOLAR ACTIVE LONGITUDES FROM KODAIKANAL WHITE-LIGHT DIGITIZED DATA
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来自 Kodaikanal 白光数字化数据的太阳活动经度
DOI：
10.3847/1538-4357/835/1/62
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
D. Banerjee
中科院分区：
文献类型：
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作者：
S. Mandal;Subhamoy Chatterjee;D. Banerjee
近年来，太阳活动经度的研究引起了人们极大的兴趣。在这项工作中，我们使用了从Kodaikanal天文台获得的独特的，连续的太阳黑子数据系列，并重新研究了这个问题。对数据的分析表明，在整个90年的数据中，活跃经度持续存在。我们比较了两种经过充分研究的分析方法，并给出了它们的结果。发现两个最活跃的经度之间的距离在大多数时候大约为180°。此外，我们还发现在90°和270°处存在相对较弱的分离。这些活动经度的迁移模式与太阳微分旋转曲线一致。我们还研究了活络经度的周期，发现两个优势周期为≈1.3和≈2.2年。这些周期，也在其他太阳代用物中发现，表明它们与全球太阳发电机机制的关系。
The study of solar active longitudes has generated great interest in recent years. In this work we have used a unique, continuous sunspot data series obtained from the Kodaikanal observatory and revisited the problem. An analysis of the data shows a persistent presence of active longitudes during the whole 90 years of data. We compared two well-studied analysis methods and presented their results. The separation between the two most active longitudes is found be roughly 180° for the majority of time. Additionally, we also find a comparatively weaker presence of separations at 90° and 270°. The migration pattern of these active longitudes as revealed by our data is found to be consistent with the solar differential rotation curve. We also study the periodicities in the active longitudes and found two dominant periods of ≈1.3 and ≈2.2 years. These periods, also found in other solar proxies, indicate their relation with the global solar dynamo mechanism.
DOI：
10.3847/0004-637x/818/2/127
发表时间：
2015-12
期刊：
The Astrophysical Journal
影响因子：
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作者：
N. Gyenge;A. Ludm'any;T. Baranyi
通讯作者：
N. Gyenge;A. Ludm'any;T. Baranyi