Advertisement

Solar Physics

, Volume 70, Issue 1, pp 197–203 | Cite as

Solar rotation velocity as determined from sunspot drawings of J. Hevelius in the 17th century

  • Claudia Abarbanell
  • Hubertus Wöhl
Article

Abstract

Using two original copies of Hevelius' ‘Selenographia’ and reducing spot positions with two different methods, we found that the solar angular rotation velocity at the beginning of the Maunder minimum was about the same as today. The gradient of the differential rotation was slightly steeper than given in modern reductions, but not significantly different. These findings are in contradiction to those published by Eddy et al. (1976).

Keywords

17th Century Rotation Velocity Differential Rotation Solar Rotation Angular Rotation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Abarbanell, C.: 1979, Staatsexamensarbeit, Universitäts-Sternwarte Göttingen.Google Scholar
  2. Balthasar, H., Stark, D., and Wöhl, H.: 1978, Workshop on Solar Rotation, Catania Astrophys. Obs. Publ. No. 162, p. 140.Google Scholar
  3. Belvedere, G., and Paternó, L.: 1978, Workshop on Solar Rotation, Catania Astrophys. Obs. Publ. No. 162, p. 325.Google Scholar
  4. Carrington, R. C.: 1863, ‘Observations of the Spots on the Sun from November, 9, 1853, to March, 24, 1861, made at Redhill’, London/Edinburgh.Google Scholar
  5. Eddy, J. A.: 1976a, Sci. Am. 236, 80.Google Scholar
  6. Eddy, J. A.: 1976b, Science 192, 1189.Google Scholar
  7. Eddy, J. A., Gilman, P. A., and Trotter, D. E.: 1976, Solar Phys. 46, 3.Google Scholar
  8. Hevelius, J.: 1647, Selenographia Sive Lunae Descriptio, Gedani. (Two original books and a reprint produced by Johnson Reprint Corporation were used; see text for details about the books and reprint.)Google Scholar
  9. Waldmeier, M.: 1961, The Sunspot Activity in the Years 1610–1960, Schulthess & Co., Zürich.Google Scholar
  10. Ward, F.: 1966, Astrophys. J. 145, 416.Google Scholar
  11. Wöhl, H.: 1978, Sterne und Weltraum 17, 25.Google Scholar

Copyright information

© D. Reidel Publishing Co 1981

Authors and Affiliations

  • Claudia Abarbanell
    • 1
  • Hubertus Wöhl
    • 1
  1. 1.Universitäts-SternwarteGöttingenF.R.G.

Personalised recommendations