Fig. 5
HRD projection of Mt. Wilson stars with irregular or multi-period and moderate activity (0.17 < S < 0.25, see Table 3). Most of these stars are more massive than the Sun and are evolved to or beyond about half their MS lifetime. Again, dashed lines indicate approximate positions of the ZAMS and 50% MS lifetime, metal-poor stars are marked by +, the Sun by o.
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