The Global Dynamics of the High-Temperature Corona |
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| Authors: | Hudson Hugh |
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| Institution: | (1) Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagewa 229, Japan |
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| Abstract: | This paper surveys coronal motions detected by the Yohkoh soft X-ray telescope SXT, emphasizing `global restructuring'. Large-scale structures in the solar corona can persist for
time scales much longer than those of the supergranulation, and may have larger spatial scales. Flares and coronal mass ejections
(CMEs) can disrupt these structures. A grazing-incidence telescope such as SXT provides a view of the corona biased in temperature
towards the hotter components, but in a thick `observing slice' (spatial contribution function). This helps in seeing excitation
(energy release) but may conceal some of the structural changes. The observations of restructuring largely appear to consist
of expanding or outwards magnetic motions, which are endoergic. This suggests a conjecture regarding the existence of magnetic implosions on scales not yet detected, as a source of free energy. |
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