Rediscovery of 23 Historical Records of Naked-Eye Sunspot Observations in AD 1618
Rediscovery of 23 Historical Records of Naked-Eye Sunspot Observations in AD 1618
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重新发现公元1618年肉眼观测太阳黑子的23条历史记录
DOI：
10.1007/s11207-022-02046-w
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发表时间：
2022-09
期刊：
影响因子：
2.8
通讯作者：
Huiduan Li
中科院分区：
文献类型：
--
作者：
Hongrui Wang;Huiduan Li
1618年曾被视为首个观测到的太阳活动周期的极小期，甚至被认为是蒙德极小期延长阶段的开端。然而，来自放射性碳年度数据集的新成果（乌索斯金等人，《天体物理学与天文学》649卷，A141页，2021年）表明……
The year 1618 was once regarded as a minimum of the first observed solar cycle or even the beginning of the extended Maunder minimum. However, new results from the annual dataset of radiocarbon (Usoskin et al., Astron. Astrophys.649, A141, ) shows that 1620 was the solar minimum, instead of the year 1618. We revisited the sunspot activity in 1618 from historical records of naked-eye sunspot observations (HRNSOs) in China, as daily telescopic observations were found on only 28 days in 1618, and they are far from sufficient to resolve the difference. We rediscovered 23 HRNSOs from 1618 by a search of more than 800 historical books, with 15 HRNSOs identified as independent observations. From the sunspot records rediscovered here, the Chinese had seen several large sunspots in 1618. On 20 and 21 June 1618, the vapor-like sunspots were so large that even ordinary people could see them and thought that the Sun was abnormal. On 22 June 1618, at least three Chinese observers reported a huge group as a diffusive, round, and vapor-like object with an impressive size. The 23 HRNSOs rediscovered here provide valuable observations to determine the sunspot activity in the year 1618. Our result confirms the one from the annual dataset of radiocarbon, and shows that the year 1618 was quite active.
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从蛋状太阳黑子的肉眼观察中揭示强烈的古代太阳活动
DOI：
10.3847/1538-4357/ac2152
发表时间：
2021-11
期刊：
The Astrophysical Journal
影响因子：
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作者：
Hongrui Wang;Huiduan Li
通讯作者：
Huiduan Li
DOI：
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1979
期刊：
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影响因子：
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DOI：
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1988
期刊：
Quarterly journal of the royal astronomical society
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DOI：
10.4159/9780674056206
发表时间：
2010-06
期刊：
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影响因子：
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