Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...210..810p&link_type=abstract
Astrophysical Journal, vol. 210, Dec. 15, 1976, pt. 1, p. 810-815.
Astronomy and Astrophysics
Astrophysics
7
Magnetohydrodynamic Flow, Photosphere, Solar Atmosphere, Solar Granulation, Solar Magnetic Field, Atmospheric Stratification, Compressible Flow, Convective Flow, Equilibrium Equations, Equipartition Theorem, Gas Flow
Scientific paper
It has previously been inferred that small isolated flux tubes appearing in supergranule boundaries are compressed to 1500 gauss or more. This paper considers whether some dynamic condition within a flux tube exists which provides both stability and a 'mechanical advantage' so that a small force over a small period of time can accomplish the enormous compression from the weak-field to the strong-field state. It is found that the equipartition solutions to the hydromagnetic equations apparently may have the desired property of permitting an infinitesimal external pressure to convert a gentle flow of gas along a weak field into a very intense field through a succession of equipartition states. An illustrative example is presented, and field compression by convective forces is analyzed.
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