Value of the quantity a_rel + a_stat − a_sens vs. year, in blue. According to theory, the q-triplet holds the relationship a_rel + a_stat − a_sens = 1 for solar wind (dashed red line). Superimposed (dashed black line) is the annual mean F10.7 solar radio flux index, shown on the secondary y-axis as a proxy for solar activity. While a moderate anticorrelation is observed (Pearson correlation coefficient r = −0.47, p-value p = 0.055), the deviation is not statistically significant, suggesting a possible – but not definitive – influence of the solar cycle on the q-triplet structure.