Abstract
Measurements of the rotation rate of polar magnetic features during 1974–76 lead to a significantly slower rotation rate than that found earlier for polar faculae in 1951–54. Similarly, the rotation rate of these features is slower than the Doppler-determined rate at polar latitudes or the rotation rate of polar filaments. It is suggested that the strong latitude rotation gradient in the subsurface magnetic flux tubes which is implied by these results may presage a very active solar maximum for cycle 21.
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d'Azambuja, M. and d'Azambuja, L.: 1948,Ann. Obs. Paris 6, No. 7.
Babcock, H. W.: 1961,Astrophys. J. 118, 387.
Beckers, J. M: 1978,Astrophys. J. Letters 224, L143.
Bumba, V. and Howard, R.: 1969,Solar Phys. 7, 28.
Foukal, P.: 1976,Astrophys. J. Letters 203, L145.
Foukal, P. and Jokipii, J. R.: 1975,Astrophys. J. Letters 199, L71.
Gilman, P. A.: 1974,Ann. Rev. Astron. Astrophys. 12, 47.
Howard, R.: 1976a,Astrophys. J. Letters 210, L159.
Howard, R.: 1976b,Solar Phys. 48, 411.
Howard, R. and Harvey, J.: 1970,Solar Phys. 12, 23.
Livingston, W. C.: 1969,Solar Phys. 7, 144.
Müller, R.: 1954,Z. Astrophys. 35, 61.
Newton, H. W. and Nunn, M. L.: 1951,Monthly Notices Roy. Astron. Soc. 111, 413.
Schatten, K. H., Scherrer, P. H. Svalgaard, L., and Wilcox, J. M.: 1978,Geophys. Res. Letters, in press.
Sheeley, N. R. Jr.: 1976,J. Geophys. Res. 81, 3462.
Svalgaard, L. and Wilcox, J. M.: 1976,Nature 262, 766.
Waldmeier, M.: 1955,Z. Astrophys. 38, 37.
Yoshimura, H.: 1971,Solar Phys. 18, 417.
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Howard, R. Magnetic field rotation at high solar latitudes. Sol Phys 59, 243–248 (1978). https://doi.org/10.1007/BF00951832
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DOI: https://doi.org/10.1007/BF00951832