A zoom of the Teff − log g diagram shown in Fig. 1 showing the region where is located the only known (so far) pulsating ELM white dwarf, SDSS J184037.78+642312.3 (Hermes et al. 2012) displayed with a red circle. We include the approximate ℓ = 1 g-mode blue edge of the theoretical ELM instability domain derived by SEA10 (thick black solid line), and the ℓ = 1 g-mode blue edge computed in this work (blue solid line) for all the sequences considered, included that of M∗ = 0.17 M⊙, and extended towards lower gravities (blue dashed line). We also show our ℓ = 1 p-mode blue edge of instability (thin dotted line).
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