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Basic properties of magnetic flux tubes and restrictions on theories of solar activityIt 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.
Document ID
19770031104
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Parker, E. N.
(Chicago, University Chicago, Ill., United States)
Date Acquired
August 9, 2013
Publication Date
September 1, 1976
Publication Information
Publication: Astrophysics and Space Science
Volume: 44
Subject Category
Solar Physics
Accession Number
77A13956
Funding Number(s)
CONTRACT_GRANT: NGL-14-001-001
Distribution Limits
Public
Copyright
Other

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