Active region contributions to the solar wind over multiple solar cycles
D. Stansby,
L. M. Green,
L. van Driel-Gesztelyi
et al.
Abstract:Both coronal holes and active regions are source regions of the solar wind. The distribution of these coronal structures across both space and time is well known, but it is unclear how much each source contributes to the solar wind. In this study we use photospheric magnetic field maps observed over the past four solar cycles to estimate what fraction of magnetic open solar flux is rooted in active regions, a proxy for the fraction of all solar wind originating in active regions. We find that the fractional co… Show more
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