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  • 1
    Electronic Resource
    Electronic Resource
    Longitudinal Distribution of Solar Magnetic Fields and Activity During the Ending and Starting Periods of Activity Cycles (2000)
    Springer
    Solar physics 196 (2000), S. 403-419 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Studying the appearance of active regions during periods of solar activity minima, we observed that the magnetic fields of active regions belonging to the old and new cycle were mutually related. This was the reason we decided to investigate the relation of the old and new cycle activity during the two last minima in more detail. We examined the distribution of both activities in heliographic longitude, because the patterns of such distribution change substantially during the time of the minimum, and we studied their relation to the distribution and development of the global (background) magnetic field. We observed that the active regions of the old and new cycles tended to concentrate in the same active longitudes. The sources of their magnetic fluxes seem to have the same heliographic longitude. The beginning of the new cycle activity, occurring at the very beginning to a very weak degree in the equatorial zone, and then proceeding to higher latitudes, occurs in the magnetic field remnants of the old cycle activity. During the transition phase, a relatively large number of small active regions is produced by both cycles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005226228739
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  • 2
    Electronic Resource
    Electronic Resource
    The Role of the Magnetic Field in the Ascension of the 22nd and 23rd Cycles of Activity (2000)
    Springer
    Solar physics 197 (2000), S. 175-202 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The first small active regions of the last two new cycles seem to be formed, in its very first, preparatory stage, close to the equator with uncertain magnetic orientation, and as secondary products at the periphery of equatorial `magnetic bubbles' of the new magnetic flux still belonging to the old cycle. At the real beginning of the new cycle, at the periphery of its higher-latitude `magnetic bubbles', the opposite applies to the secondary regions of the ending cycle. It seems that two modes of magnetic flux supply the visible layers of the photosphere during the cycle transition phase: the emergence of the magnetic flux from the depth of the convective zone, and the mutual interaction of the earlier emerging fluxes, or the action of the `local dynamo', giving rise to the new local magnetic field concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026564727830
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  • 3
    Electronic Resource
    Electronic Resource
    НОВЫЕ КНИГИ (1960)
    Springer
    Czechoslovak journal of physics 10 (1960), S. 75-76 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01557106
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  • 4
    Electronic Resource
    Electronic Resource
    Book reviews (1996)
    Springer
    Space science reviews 76 (1996), S. 339-379 
    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/BF00197844
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  • 5
    Electronic Resource
    Electronic Resource
    Shadia Rifai Habbal (ed.), Robotic Exploration Close to the Sun: Scientific Basis (1997)
    Springer
    Space science reviews 82 (1997), S. 469-469 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005022522903
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  • 6
    Electronic Resource
    Electronic Resource
    Does the large-scale solar magnetic field distribution really reflect the convective velocity fields? (1987)
    Springer
    Solar physics 110 (1987), S. 51-57 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have tried to decide whether the typical circular cellular-like features, which are striking during some intervals in the large-scale distribution of weak magnetic fields measured with low resolution, are related to large-scale convective motions. Two scales of such patterns were found and their morphological, kinematical and evolutionary behaviour was estimated. Their slower and overall rotation is also demonstrated in comparison with the rotation of highly averaged sunspot and magnetic fields. It is difficult to explain all the observed characteristics as random, or due to the method of field measurement and map construction used. We also discuss the change of their magnetic field polarities with the solar polar field reversal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00148201
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  • 7
    Electronic Resource
    Electronic Resource
    Concerning the formation of giant regular structures in the solar atmosphere (1970)
    Springer
    Solar physics 14 (1970), S. 80-88 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using the Mt. Wilson magnetic synoptic charts from the recent solar activity cycles the dynamics of the formation of giant regular structures formed in the plus (leading) polarity of older more extended magnetic fields are studied. Although their diameters are about one order greater than those of supergranules, the processes of their development go analogously to those of supergranulation and granulation. The close relation of the minus (following) polarity distribution to the new formed active regions is demonstrated and the possible different mode of distribution and different role of both opposite polarities on activity processes is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00240162
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  • 8
    Electronic Resource
    Electronic Resource
    Variability of the integrated solar K line emission (1967)
    Springer
    Solar physics 1 (1967), S. 216-219 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Conclusion The preliminary results presented in this note seem to demonstrate the facts that the sun observed as a star in the light of the K and H lines is variable, and that this variability is closely related to that of the magnetic field intensity, or to the distribution of magnetic fields, and hence to the distribution of calcium plages or photospheric faculae in the solar atmosphere. This variability will not so much be related to the variation of Wolf's relative sunspot numbers or to the variation of the sunspot area. The applicability of the obtained results for the examination of the late-type stars seems to be evident.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00150856
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  • 9
    Electronic Resource
    Electronic Resource
    Book reviews (1992)
    Springer
    Solar physics 141 (1992), S. 203-204 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00155913
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  • 10
    Electronic Resource
    Electronic Resource
    Solar zonal average magnetic field and the latitudes of sunspot groups (1994)
    Springer
    Solar physics 155 (1994), S. 257-265 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Positions of active regions estimated from observations of the whole solar disk in Caii K iv during the period 1977–1989 at the Coimbra Astronomical Observatory are compared with the time-dependent latitudinal distribution of background solar magnetic fields and with the latitudinal shifts of boundaries of their polarities. We confirm that the sunspot groups are located near the zonal boundaries between the opposite polarities of the solar background magnetic field during different phases of the two recent consecutive cycles of activity. We demonstrate a probable connection between the increased number of groups and the commencement of poleward migration of zonal boundaries in both hemispheres. But the influence of the ‘dominant convective rolls’ seems to he still unclear. A new problem of interrelation between the zonal and sector boundaries has also appeared.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00680595
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