Analyses of Early Sunspot Records by Jean Tarde (1615-1617) and Jan Smogulecki (1621-1625)

被引:8
作者
Carrasco, V. M. S. [1 ,2 ]
Gallego, M. C. [1 ,2 ]
Alvarez, J. Villalba [3 ]
Vaquero, J. M. [2 ,4 ]
Hayakawa, H. [5 ,6 ,7 ,8 ]
机构
[1] Univ Extremadura, Dept Fis, Badajoz 06006, Spain
[2] Univ Extremadura, Inst Univ Invest Agua, Cambio Climat & Sostenibilidad IACYS, Badajoz 06006, Spain
[3] Univ Extremadura, Dept Ciencias Antiguedad, Caceres 10071, Spain
[4] Univ Extremadura, Dept Fis, Merida 06800, Spain
[5] Nagoya Univ, Inst Adv Res, Nagoya, Aichi 4648601, Japan
[6] Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi 4648601, Japan
[7] Harwell Oxford, RAL Space Sci & Technol Facil Council, Space Phys & Operat Div, Rutherford Appleton Lab,UK Solar Syst Data Ctr, Didcot OX11 0QX, Oxon, England
[8] RIKEN, Nishina Ctr, Wako, Saitama 3510198, Japan
关键词
Solar cycle; observations; Sunspots; statistics; SOLAR-ACTIVITY; NUMBERS;
D O I
10.1007/s11207-021-01905-2
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Jean Tarde and Jan Smogulecki carried out sunspot observations in the 1610s and 1620s at the dawn of the telescopic era. We analysed their original observational records to revise their sunspot-group numbers in the existing database. In this study, we provide a new counting as a basis for future scientific discussions. Furthermore, we compared Smogulecki's sunspot observations with those of Scheiner and Schonberger on the same observation days. We also detected a big sunspot group on 2 - 3 February 1622 in Smogulecki's sunspot drawings and estimated its area to be approximately 1600 millionths of the solar disc. In addition, we measured the sunspot positions in Tarde's and Smogulecki's sunspot drawings to construct a butterfly diagram for this early period.
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页数:14
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