The calcium K-line network in coronal holes |
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Authors: | K. A. Marsh |
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Affiliation: | (1) Big Bear Solar Observatory, Hale Observatories, Carnegie Institution of Washington, California Institute of Technology, USA |
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Abstract: | Microphotometry of calcium K-line photographs in the regions of polar coronal holes shows that the chromospheric network exterior to a hole has a slightly broader intensity distribution than that inside the hole itself, a fact which can be attributed to a greater number of bright network elements outside the hole. These bright elements presumably represent the enhanced network resulting from the dispersal of magnetic flux from old active regions, a hypothesis which is consistent with current ideas of coronal hole formation. |
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