Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984azh....61...91s&link_type=abstract
(Astronomicheskii Zhurnal, vol. 61, Jan.-Feb. 1984, p. 91-99) Soviet Astronomy (ISSN 0038-5301), vol. 28, Jan.-Feb. 1984, p. 54-
Astronomy and Astrophysics
Astronomy
1
Flux Pinning, Magnetic Field Configurations, Magnetohydrostatics, Solar Magnetic Field, Trapped Magnetic Fields, Magnetic Stars, Magnetostatic Fields, Solar Activity, Solar Temperature
Scientific paper
The static confinement of a magnetic field concentrated in a field tube possessing axial symmetry is considered. It is shown that for the surface structures observed on the sun one must allow for the radial component of the field, which can make a significant contribution to the pressure balance (the funnel effect). Model calculations are made for a magnetic field tube in which the field distribution obeys the similarity principle, while the field at the axis decreases exponentially with height. It is found that under the condition lambda (m) less than about a/4, where lambda (m) is the magnetic scale height and a is the transverse size of the tube, confinement of the magnetic field is also possible with a positive pressure difference between the field tube and the surrounding medium at the level of the photosphere. Temperature and pressure profiles are constructed under various assumptions about the geometrical parameters of the system.
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