Cyclical Variation of the Quiet Corona and Coronal Holes

[摘要] Recent advances in the understanding of the quiet corona and coronal holes are reviewed. The review is based on long-term accumulation of data from eclipse observations, coronagraph observations, helium 10830 Ã… spectroheliograms, and X-ray observations.

[学科分类] 天文学(综合)

[关键词] Coronagraphs;solar activity cycle;solar corona;total eclipses;X-ray observations.