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?

P. G. Beck; T. Kallinger; K. Pavlovski; A. Palacios; A. Tkachenko; S. Mathis; R. A. García; E. Corsaro; C. Johnston; B. Mosser; T. Ceillier; J.-D. do Nascimento; G. Raskin

doi:10.1051/0004-6361/201731269

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Volume 612 (April 2018)

A&A, 612 (2018) A22

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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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