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Fig. 11

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Internal chemical structure (upper panel) and the squared Brunt-Vaïsälä and Lamb frequencies for = 1 (lower panel) corresponding to our best-fit DB white dwarf model with a stellar mass M = 0.84 M, an effective temperature Teff = 25 050 K, and a He envelope mass of MHe/M ~ 1.5 × 10-3.

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