Do changes in coronal emission structure imply magnetic reconnection

Physics

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Far Ultraviolet Radiation, Magnetic Field Configurations, Solar Corona, Solar Magnetic Field, Solar X-Rays, Lines Of Force, Plasma Spectra, Potential Fields, Solar Physics

Scientific paper

Several physical processes that can affect the emission from structures in the corona are investigated on the basis of images of coronal X-ray and XUV emission structures. Changes in emission accompanied by little or no change in large-scale magnetic structure are examined, and three theoretically distinct processes by which magnetic structure can change are discussed: reconfiguration of potential (current-free) fields, reconfiguration of frozen-in fields, and reconfiguration by magnetic-field-line reconnection. The possibility is considered of determining by observation whether a change in emission results from a magnetic change and, if so, what kind of magnetic change has occurred. It is concluded that changes in coronal emission structure do not necessarily imply magnetic reconnection.

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