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Fig. 7


Hertzsprung-Russell diagram for sample of barium and related stars labelled as in queried catalogues. Green crosses indicate barium giants; pink squares indicate barium dwarfs; black dots indicate CH giants; and blue triangles indicate subgiant CH stars. Typical error bars are shown over the legend for two situations: a favourable case (left: ϖ/σ(ϖ) = 8), and limiting case for ϖ/σ(ϖ) = 3 (right). Stellar tracks from the STAREVOL code (Siess 2006) were overplotted for models of masses 1.0, 2.0, 3.0, 4.0, 5.0, and 6.0 M, as labelled and metallicity [Fe/H] = 0.25. The solid black tracks correspond to the post-main-sequence evolution up to the tip of the RGB (low-mass stars) or to the onset of core He-burning (intermediate-mass stars), dotted blue tracks correspond to core He-burning, and dashed red tracks to the early and thermally pulsing AGB (TP-AGB) phase.

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