Abstract
view Abstract Citations (51) References (6) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The structure of twisted magnetic flux tubes Browning, P. K. ; Priest, E. R. Abstract The basic physics of untwisted flux tubes confined by an external plasma pressure has been developed by Parker (1979). However, observations indicate that in many situations on the sun flux tubes are twisted. There is, for instance, evidence for helical structures in erupting prominences. It is, therefore, important to extend the results already found for untwisted tubes to include the effects of twist. The present investigation is concerned with the structure of a thick twisted flux tube in an inhomogeneous atmosphere. Previous work on untwisted flux tubes and straight cylindrical twisted tubes is generalized, in order to describe the properties of twisted flux tubes confined by a varying external pressure. The governing equations are nonlinear, and, if the confining pressure is specified, they define a free surface problem. This problem is solved analytically in certain limiting cases, for which the complete structure of the field is found. Two exact solutions for force-free fields are studied in detail. Publication: The Astrophysical Journal Pub Date: March 1983 DOI: 10.1086/160833 Bibcode: 1983ApJ...266..848B Keywords: Magnetohydrodynamics; Solar Magnetic Field; Stellar Models; Mathematical Models; Nonlinear Equations; Plasma Pressure; Pressure Effects; Tubes; Solar Physics full text sources ADS |
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