Abstract
We describe the results of a model dynamic simulation of the formation and support of a narrow prominence at the apex of a coronal magnetic loop or arcade. The condensation process proceeds via an initial radiative cooling and pressure drop, and a secondary siphon flow from the dense chromospheric ends. The anti-buoyancy effect as the prominence forms causes a bending of the confining magnetic field, which propagates toward the semi-rigid ends of the magnetic loop. Thus, a wide magnetic ‘hammock’ or well (of the normal-polarity Kippenhahn-Schlüter-type) is formed, which supports the prominence at or near the field apex. The simplicity of this 1.5-dimensional model, with its accompanying diagnostics, allows one to comprehend the various contributions to the nonlinear dynamics of prominence condensation and levitation.
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Van Hoven, G., Mok, Y. & Drake, J.F. Prominence condensation and magnetic levitation in a coronal loop. Sol Phys 140, 269–287 (1992). https://doi.org/10.1007/BF00146313
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DOI: https://doi.org/10.1007/BF00146313