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  • 1
    Electronic Resource
    Electronic Resource
    ON STELLAR ENVELOPES (1941)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 41 (1941), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1941.tb35230.x
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  • 2
    Electronic Resource
    Electronic Resource
    The Sun as a Magnetic Rotator (1970)
    [s.l.] : Nature Publishing Group
    Nature 228 (1970), S. 1179-1180 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Let us first consider the observation that, at most times, the integrated field of sunspots seems to be opposite to the field of the Sun as a whole. Magnetic flux through the leading part of a bipolar magnetic region or bipolar group must be equal to that through the following partr The following ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2281179a0
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  • 3
    Electronic Resource
    Electronic Resource
    Remarks concerning Ward's ‘the latitudinal motion of sunspots and solar meridional circulations’ (1974)
    Springer
    Solar physics 34 (1974), S. 15-16 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Investigations based on independent observational materials and carried out by different authors show that sunspot groups display a latitudinal drift curve, the shape of which depends on phase in the solar cycle. Ward has tried to disprove this. His conclusions are based on ignorance of work done previously and on a mathematical misunderstanding.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00149594
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  • 4
    Electronic Resource
    Electronic Resource
    22-year cycle or 11-year cycle in the latitude drift of sunspot groups? (1976)
    Springer
    Solar physics 47 (1976), S. 541-550 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract 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 years). Other studies, however, show that the drift of sunspots varies with the period of the single sunspot cycle. There seems to be a discrepancy between the two results. The problem is reinvestigated on the basis of long-lived sunspot groups, but treating the material in a way different from that used before. This procedure, which uses central values of the proper motions of the groups instead of their average values, gives an additional proof of the reality of the 11-year period of the drift. It also seems to produce the 22-year period, but there is such a difference between the variabilities of the drift found on the basis of the two methods that the 22-year cycle of the drift is made doubtful.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00154762
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  • 5
    Electronic Resource
    Electronic Resource
    Positions of sunspot groups and solar rotation (1981)
    Springer
    Solar physics 74 (1981), S. 153-163 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract 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 average observable centres of gravity of spot groups are variably displaced towards the central meridian or towards the limb, the time scale of this variability being of the order of 70 years. Thus the angular velocity should be determined from recurrent groups in transit of the central meridian only. (2) The angular velocity will be smaller when determined from older spots.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00151285
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  • 6
    Electronic Resource
    Electronic Resource
    On the latitude drift of sunspot groups and solar rotation (1982)
    Springer
    Solar physics 79 (1982), S. 161-172 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00146980
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  • 7
    Electronic Resource
    Electronic Resource
    Book reviews (1980)
    Springer
    Space science reviews 25 (1980), S. 431-433 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00241559
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    Paper (German National Licenses)
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