Non-equilibrium of a cylindrical magnetic arcade

Details Non-equilibrium of a cylindrical magnetic arcade Non-equilibrium of a cylindrical magnetic arcade

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989soph..123..127s&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 123, no. 1, 1989, p. 127-141. Research supported by SERC.

Physics

2

Magnetic Field Configurations, Perturbation Theory, Photosphere, Solar Prominences, Coronal Loops, Magnetic Field Reconnection, Solar Magnetic Field, Stellar Mass Ejection

Scientific paper

A cylindrically-symmetric magnetic arcade with its axis on the photosphere is perturbed by means of an alteration in the pressure along the base. The perturbation is examined with a view to finding equilibrium configurations close to the original equilibrium. It is found that equilibria can only be found when the integral of the excess pressure along the base is zero. In other cases no equilibria can be found and the arcade is likely either to collapse or, in the case of a coronal mass ejection, to erupt. For an initial arcade whose field increases linearly with radial distance from the axis, the neighboring equilibria have been found.

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