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Fig. 5

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γ-asymmetry (averaged over all spectral lines) and the k-term (as defined in the text) as a function of the pulsation period of the star (in days). The correlation between the k-term and the γ-asymmetry is presented in panel c). The crosses are for the eight Cepheids studied in Nardetto et al. (2008) and the triangle is for α Lup.

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