Fig. 1.
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Teff − log g diagram of the full sample of hot subluminous stars. The size of the symbols scales with ΔRVmax, the colour with the helium abundance from light orange to red. The EHB band (solid lines) is based on evolutionary tracks with subsolar metallicity (log z = −1.48) from Dorman et al. (1993). The helium main sequence (dashed line) is taken from Paczynski (1971).
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