Toomre diagram for a subset of our sample (orange circles) in comparison with the sample of CEMP-no (blue squares) and C-normal metal-poor halo stars (black diamonds) from Hansen et al. (2015b, 2016b,a). Only stars BD + 09_2190 (star), BD-15_779, HE0420 + 0123a, 2MASS J0023, and TYC5481 are shown for their chemical peculiarities. The CEMP-no candidate 2MASS J0023 is singled out by a large blue circle and TYC5481, a CEMP-r∕s candidate, isshown by a red circle. The dashed circles correspond to a space velocity relative to the local standard of rest of 100 and 200 km s⁻¹, centred on V_LSR = 232 km s⁻¹.