The lost sunspot cycle: New support from 10 Be measurements
The lost sunspot cycle: New support from 10 Be measurements
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失去的太阳黑子周期：来自 10 Be 测量的新支持
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
A. Fogtmann
中科院分区：
文献类型：
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作者：
C. Karoff;F. Inceoglu;M. Knudsen;Jesper V. Olsen;A. Fogtmann
有人认为，1790 年至 1830 年间太阳表面黑子数量的短缺（称为道尔顿极小值）包含了沃尔夫在原始太阳黑子记录中未发现的额外周期。尽管这个周期比平均太阳周期更短、更弱，但它改变了早期周期的太阳磁场的磁宇称。这个额外的周期有时被称为“消失的太阳周期”或“周期 4b”。在这里，我们重新分析了北格陵兰冰芯项目的年分辨率 10 Be 测量值，以调查这些测量值是否支持有关太阳黑子消失周期的假设。具体来说，我们利用了这样一个事实，即负责在地球大气层中形成 10 Be 的银河宇宙射线在偶数和奇数太阳周期期间受到开放太阳磁场的不同影响。这使我们能够评估早于周期 5 的周期编号是否正确。为了进行评估，我们使用贝叶斯分析，这表明丢失的太阳黑子周期假设很可能是正确的。我们还讨论了这个周期 4b 是一个真正的周期还是一个相位灾难，以及这对我们对恒星活动周期的总体理解有何影响。
It has been suggested that the shortage in the number of spots on the surface of the Sun between 1790 and 1830, known as the Dalton minimum, contained an extra cycle that was not identified in the original sunspot record by Wolf. Though this cycle was shorter and weaker than the average solar cycle, it shifted the magnetic parity of the solar magnetic field of the earlier cycles. This extra cycle is sometimes referred to as the “lost solar cycle” or “cycle 4b”. Here we reanalyse 10 Be measurements with annual resolution from the North Greenland Ice Core Project in order to investigate if the hypothesis regarding a lost sunspot cycle is supported by these measurements. Specifically, we make use of the fact that the Galactic cosmic rays, responsible for forming 10 Be in the Earth’s atmosphere, are affected differently by the open solar magnetic field during even and odd solar cycles. This enables us to evaluate if the numbering of cycles earlier than cycle 5 is correct. For the evaluation, we use Bayesian analysis, which reveals that the lost sunspot cycle hypothesis is likely to be correct. We also discuss whether this cycle 4b is a real cycle or a phase catastrophe, and what implications this has for our understanding of stellar activity cycles in general.
影响因子：
6.5
作者：
T. Kallinger;J. Ridder;S. Hekker;S. Mathur;S. Mathur;B. Mosser;M. Gruberbauer;M. Gruberbauer;R. García;C. Karoff;J. Ballot;J. Ballot
通讯作者：
T. Kallinger;J. Ridder;S. Hekker;S. Mathur;S. Mathur;B. Mosser;M. Gruberbauer;M. Gruberbauer;R. García;C. Karoff;J. Ballot;J. Ballot