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Fig. 14

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Echelle diagram for the 4 M models of Fig. 13.  ⟨ Δν ⟩  is taken to be 1.53, 1.49 and 1.52 μHz (for the observed range: 5 ≤ n ≤ 12) for the three stages of evolution: the youngest (violet), intermediate (red) and the oldest (black) ones. The differences between the three cases are too small to be detected with the present data set.

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