Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS - V. Discovery of two new DBV pulsators, WDJ152738.4−450207.4 and WD 1708−871, and asteroseismology of the already known DBV stars PG 1351+489, EC 20058−5234, and EC 04207−4748

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Fig. 11.

Schematic distribution of the pulsation periods of PG 1351 according to TESS (6 periods, black lines, upper panel), and according to Redaelli et al. (2011; 4 periods, blue lines, lower panel). The amplitudes have been arbitrarily set to one for clarity.

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