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This article has an erratum: [https://doi.org/10.1051/0004-6361/201525666e]


Fig. 2

image

Teff − log g diagram of RV variable hydrogen-rich sdB and sdOB stars (see Fig. 1). The size of the symbols scales with ΔRVmax. The helium main sequence (HeMS) and the HB band are superimposed with HB evolutionary tracks (dashed lines) for subsolar metallicity (log z = −1.48) from Dorman et al. (1993). The three tracks correspond to helium core masses of 0.488, 0.490 and 0.495 M (from bottom-left to top-right). The two dotted lines mark post-RGB tracks (Driebe et al. 1998) for core masses of 0.234 (left) and 0,259 M (right).

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