Double periodic variable V4142 Sgr: A key to approaching the stellar dynamo

Open Access

Fig. 2.

Schematic illustration of instability regions of Brunt-Väisälä frequency, convection, semi-convection, thermohaline convection, and radiative stability in the plane. We show the thermal and compositions terms $N_{T, ad}^{2}$ ${N^{2}_{\mathrm{T,ad}}}$ and $N_{μ}^{2}$ ${N^{2}_{\mu}}$ used for V4142 Sgr.

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