Characteristics of the orbital kinematics. Our stars are represented by black dots, and the dwarfs of the First Stars by green dots. The Li-poor stars are circles in red, the Li-free star by a red square, and the low-α star by a blue square. The other very metal-poor and low-α star HE 1424-0241 (Cohen et al. 2007) is indicated by an open blue diamond. In panel A, the blue zone shows the location of the disc stars in this diagram. In panels C and E, the location occupied mainly by accreted stars is indicated. In panel D, the dotted lines delimit the region in which the Nissen & Schuster (2010) stars are located. Units of the plotted quantities are velocities in km s⁻¹, distances in kpc, angular momenta in 100 kpc km s⁻¹, and energy in 100 km² s⁻². It is important to note that in the zone marked as containing “accreted stars”, e.g., there is only a high probability that the stars in this zone are accreted, and this is the same for the zone marked “in situ”. Exceptions may exist (Schuster et al. 2012).