Abstract
Stable recurrent sunspot groups from the Greenwich data set which were identified in at least two subsequent solar rotations were traced and meridional motions were determined from the two central meridian passages. In total, 327 meridional velocities were calculated and the results for the northern and the southern solar hemisphere were compared. A dependence of the solar meridional velocity vectors on the development status, latitude and position respectively to the activity belt of sunspots is investigated. The results indicate that sunspot groups are moving on the average away from the center of activity. This was found for sunspot groups growing and decreasing in area.
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Arévalo, M. J., Gomez, R., Vázquez, M., Balthasar, H., and Wöhl, H.: 1982, Astron. Astrophys. 111, 266.
Balthasar, H. and Wöhl, H.: 1980, Astron. Astrophys. 92, 111.
Balthasar, H., Schüssler, M., and Wöhl, H.: 1982, Solar Phys. 76, 21.
Balthasar, H., Vázquez, M., and Wöhl, H.: 1986, Astron. Astrophys. 155, 87.
Gilman, P. A.: 1986, in P. A. Sturrock et al. (eds.), Physics of the Sun, Vol. I, D. Reidel Publ. C., Dordrecht, Holland, p. 95.
Hanslmeier, A. and Lustig, G.: 1986, Astron. Astrophys. 154, 227.
Howard, R. F.: 1991a, Solar Phys. 135, 43.
Howard, R. F.: 1991b, Solar Phys. 135, 327.
Howard, R. and Gilman, P. A.: 1986, Astrophys. J. 307, 389.
Kuhn, J. R.: 1996, in T. Roca Cortés and F. Sánchez (eds.), The Structure of the Sun, Cambridge University Press, Cambridge, p. 231.
Leighton, R. B.: 1964, Astrophys. J. 140, 1547.
Lustig, G. and Hanslmeier, A.: 1987, Astron. Astrophys. 172, 332.
Lustig, G. and Wöhl, H.: 1991, Astron. Astrophys. 249, 528.
Lustig, G. and Wöhl, H.: 1994, Solar Phys. 152, 221.
Pulkkinen, P. and Tuominen, I.: 1998a, Astron. Astrophys. 332, 748.
Pulkkinen, P. and Tuominen, I.: 1998b, Astron. Astrophys. 332, 755.
Rüdiger, G.: 1989, Differential Rotation and Stellar Convection, Akademie-Verlag, Berlin.
Schröter, E.-H.: 1985, Solar Phys. 100, 141.
Sheeley, N. R., Jr.: 1992, in K. L. Harvey (ed.), 'The Solar Cycle', 12th Sac. Peak Summer Workshop, ASP Conf. Ser. 27, 1.
Sheeley, N. R., Jr., Nash, A. G., and Wang, Y.-M.: 1987, Astrophys. J. 319, 481.
Snodgrass, H. B. and Dailey, S. B.: 1996, Solar Phys. 163, 21.
Stix, M.: 1989a, in G. Klare (ed.), Rev. Modern Astron. 2, 248.
Stix, M.: 1989b, The Sun, Springer-Verlag, Berlin.
Tuominen, J.: 1961, Z. Astrophys. 51, 91.
Tuominen, J. and Kyröläinen, J.: 1982, Solar Phys. 79, 161.
Wang, Y.-M. and Sheeley, N. R., Jr.: 1994, Astrophys. J. 430, 399.
Wang, Y.-M., Nash, A. G., and Sheeley, N. R., Jr.: 1989, Science 245, 712.
Wöhl, H.: 1990, in L. Dezső (ed.), 'The Dynamic Sun', 6th European Meeting on Solar Physics, Publ. Debrecen Obs. 7, 19.
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Wöhl, H., Brajša, R. Meridional Motions of Stable Recurrent Sunspot Groups. Solar Physics 198, 57–77 (2001). https://doi.org/10.1023/A:1005244301820
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DOI: https://doi.org/10.1023/A:1005244301820