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Pulsations in white dwarfs: Selected topics

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Figure

Figure 1. Approximate positions on the HR diagram of various types of pulsating white dwarfs with an evolutionarytrack of 0.57 M⊙
Figure 2. Period ranges observed in various types of white dwarf pulsators, plotted versus effective temperature.and period ranges of the observed variables white dwarfs are adopted from [Also shown are the periods of dipole g2 and g20 modes of 0.6M⊙ white
Figure 3. Top panel: spatial runs of pressure and temperature perturbations and horizontal displacement for thebottom panel showsconvection zone (5.35adiabatic dipole g5 mode in a DA white dwarf model of 0.6M⊙ (Fontaine 2012; private communication)
Figure 4. The propagation diagram of a model (Fontaine; private communication) for hot DQ white dwarf (rightpanel) is compared with that of a typical roAp star model (left panel)

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