Derived orbital parameters of the present and comparison samples, separated by the chemical sub-groups. Here, CEMP-no stars are shown as blue squares, CEMP-s as red triangles, CEMP-r and -r/s as green circles, and C-normal stars as black diamonds. Large, filled symbols are data from this work, while small filled symbols refer to the sample of Hansen et al. (2016b). Finally, the comparison stars of Hansen et al. (2015c, 2016c,a) are indicated as open symbols following the same colour code as in Figs. 3–5.