Fig. A.5.
Effects of changing the initial helium mass fraction by 0.01, in a model of a 1 M⊙, Z = 0.00987 star. While modest changes affect the ⟨Δν⟩-average density scaling relation (left panel) and the HR-diagram, except the luminosity increase of the RC (middle panel), the impact on the duration of the main sequence, hence on the age of the models on the RGB is ∼7% (right panel).
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