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Fig. 4.

image

Evolution of the ratio given by Eq. (1) in time of the models used. The plots on the right-hand side are with short-period binary eigenevolution. The black vertical dashed line and the value ⟨τv⟩ represent the mean time when the slope of the data points became flat, the thinner vertical lines are the calculated 1σ uncertainties. The horizontal fit in the corresponding time window is indicated by a grey dashed line.

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