Seismic probing of the first dredge-up event through the eccentric red-giant and red-giant spectroscopic binary KIC 9163796 - How different are red-giant stars with a mass ratio of ~1.015?

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Fig. 12

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Emission in the Ca K line in the median spectrum of the primary of KIC 9163796 (red), compared to the emission of the Hyades giants θ¹ Tau (middle curve, blue) and ϵ Tauri (bottom curve, grey).

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