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Investigation of the coronal heating through phase relation of solar activity indexes

Li, K. J.; Xu, J. C.; Yin, Z. Q. +2 more

The coronal heating problem is a long-standing perplexing issue. In this study, 13 solar activity indexes are used to investigate their phase relation with the sunspot number (SSN). Only three of them are found to statistically significantly lag the SSN (large-scale magnetic activity) by about one solar rotation period; the three indexes are total…