Physics
Scientific paper
Sep 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..44..107p&link_type=abstract
Astrophysics and Space Science, vol. 44, Sept. 1976, p. 107-117.
Physics
14
Magnetic Flux, Magnetohydrostatics, Solar Activity, Solar Magnetic Field, Solar Physics, Atmospheric Stratification, Field Strength, Photosphere, Solar Atmosphere, Sunspots, Twisting
Scientific paper
It is shown that the mean longitudinal field in a magnetic flux tube is reduced, rather than enhanced, by twisting the tube to form a rope. It is shown that there is no magnetohydrostatic equilibrium when one twisted rope is wound around another. Instead there is rapid line cutting (neutral point annihilation). It is shown that the twisting increases, and the field strength decreases, along a flux tube extending upward through a stratified atmosphere. These facts are at variance with Piddington's (1975) recent suggestion that solar activity is to be understood as the result of flux tubes which are enormously concentrated by twisting, which consist of several twisted ropes wound around each other, and which came untwisted where they emerge through the photosphere.
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