Hostname: page-component-6bf8c574d5-k2jvg Total loading time: 0 Render date: 2025-03-09T17:27:49.197Z Has data issue: false hasContentIssue false
  • English
  • Français

Solar activity reconstruction from the Georg Eimmart archive of 1616 – 1720

Published online by Cambridge University Press:  23 December 2024

Nadezhda V. Zolotova Open the ORCID record for Nadezhda V. Zolotova [Opens in a new window]  and
Mikhail V. Vokhmyanin
Nadezhda V. Zolotova*
Affiliation:
St. Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russia
Mikhail V. Vokhmyanin
Affiliation:
Space Climate Group, Space Physics and Astronomy Research Unit, University of Oulu, PO Box 3000, 90014 Oulu, Finland
*
email: ned@geo.phys.spbu.ru
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Historical sunspot records provide piece by piece more information on solar variability on a centennial scale. In this work, we analyze sunspot observations from the archives of Georg Christoph Eimmart, which is the second-richest data set of the Maunder minimum after the archives of the Paris observatory. Comparing the dates of the blank solar disk from the database by Hoyt & Schatten (1998) with dates of observations at the Eimmart observatory, we find that spotless days reports originate from astrometric observations. A comparison of the observations by La Hire and Müller of 1719 suggests that the observations by La Hire were for astrometric purposes as well, rather than aimed at sunspot counting.

Keywords

History and philosophy of astronomy(Sun:) activity(Sun:) sunspots
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 19 , Symposium S365: Dynamics of Solar and Stellar Convection Zones and Atmospheres , December 2023 , pp. 355 - 358
Check for updates
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

References

Hayakawa, H., Kuroyanagi, C., Carrasco, V. M. S., et al. 2021a, Astrophys. J., 909, 166 CrossRefGoogle Scholar
Hayakawa, H., Kuroyanagi, C., Carrasco, V. M. S., et al. 2021b, Solar Phys., 296, 154 CrossRefGoogle Scholar
Hoyt, D.V., Schatten, H. 1998, Solar Phys., 179, 189 CrossRefGoogle Scholar
MD NLR 1958, Inventory of the archive of the German mathematician, astronomer, artist, engraver and mechanic Georg Christoph Eimmart (1638–1705), Fond 998 of the Manuscript Department of the National Library of RussiaGoogle Scholar
Ribes, J.C., Nesme–Ribes, E. 1993, Astronomy Astrophys., 276, 549 Google Scholar
Vaquero, J. M., Svalgaard, L., Carrasco, V. M. S., et al. 2016, Solar Phys., 291, 3061 CrossRefGoogle Scholar
Vokhmyanin, M., Zolotova, N. 2023, Solar Phys., 298, 113 CrossRefGoogle Scholar