期刊
ASTROPHYSICAL JOURNAL
卷 887, 期 1, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/1538-4357/ab107e
关键词
history and philosophy of astronomy; solar-terrestrial relations; Sun: filaments, prominences; Sun: flares; sunspots
资金
- Ministry of Education, Culture, Sports, Science and Technology of Japan [JP18H01254, JP15H03732]
- Kyoto University's Supporting Program for the Interaction-based Initiative Team Studies Integrated study on human in space
- Mission Research Projects of the Research Institute for Sustainable Humanosphere
- SPIRITS 2017 of Kyoto University
The Sun occasionally undergoes the so-called grand minima, in which its magnetic activity, measured by the number of sunspots, is suppressed for decades. The most prominent grand minima, since the beginning of telescopic observations of sunspots, is called the Maunder minimum (1645-1715), which occurred when the sunspots became rather scarce. The mechanism underlying the grand minima remains poorly understood as there is little observational information of the solar magnetic field at that time. In this study, we examine the records of one candidate aurora display in China and Japan during the Maunder minimum. The presence of auroras in such mid-magnetic latitudes indicates the occurrence of great geomagnetic storms that are usually produced by strong solar flares. However, the records of contemporary sunspot observations from Europe suggest that, at least for the likely aurora event, there was no large sunspot that could produce a strong flare. Through simple theoretical arguments, we show that this geomagnetic storm could have been generated by an eruption giant quiescent filament or a series of such events.
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