The question is studied whether the one-year solar oscillation found by V. F. Chistyakov for the years 1965-1973 can be traced in the observations of sunspots of 1874-1971 published by Greenwich Observatory. The result is negative. But the study leads to the following two conclusions: (1) The averag
On the latitude drift of sunspot groups and solar rotation
✍ Scribed by Jaakko Tuominen; Juhani Kyröläinen
- Publisher
- Springer
- Year
- 1982
- Tongue
- English
- Weight
- 620 KB
- Volume
- 79
- Category
- Article
- ISSN
- 0038-0938
No coin nor oath required. For personal study only.
✦ Synopsis
The N-S drift of sunspot groups has been studied in a different way than previously, using positions of recurrent groups of the years 1874-1976. The existence of the meridional motions, the general shape of the drift curves, and the dissimilarity between these curves around sunspot maxima and minima, are all confirmed. In addition, also for the angular velocity of the Sun the same material gives differences around the times of sunspot maxima and minima.
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Some earlier investigations seem to indicate that sunspots show an average drift in latitude which varies sinusoidally with the period of the double sunspot cycle (about 22 years), while the same investigations do not show similar variability with the period of the single sunspot cycle (about 11 yea
Digitized Mount Wilson sunspot data from 1917 to 1985 are analyzed to examine group areas as a function of latitude distance (x) from the central latitude of activity in each hemisphere. On average these group areas are larger for the smallest values of I~J. The effect is similar to that seen for th
## Plus loin je donne la table des valeurs Y , Y2, B et I/e obtenues par l'intkgration des equations differentielles du mouvement dans I'atmosphere. Dans les calculs ont pris part M. M. Milovanov, sfigokv et Davidovitch. Persiides Perseides P e d i d e s Y 2 P, '/PI