Influence of metallicity on the near-surface effect on oscillation frequencies

Open Access

Fig. 4.

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Parameters a (top panel), b (middle panel) and a₃, BG2 (bottom panel) across the Kiel diagram from K08 and BG2. The symbols refer to [Fe/H] = − 1.0 (diamond), [Fe/H] = − 0.5 (square), [Fe/H] = + 0.0 (circle) and [Fe/H] = + 0.5 (triangle).

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