(a) Correlation between the magnetic field and the plasma β (see text). The grey area corresponds to the range of YSO accretion flow parameters described in Sect. 3.1. The dotted vertical line marks the laser-driven flow β for electron plasma density 5 × 10¹⁷ cm⁻³ and temperature 500 kK (see Table 1), and the horizontal dashed lines correspond to the deduced minimum and maximum magnetic field values of the YSOs in the range of relevance to the laboratory plasma stream. (b) Correlation between the stream velocity and the Euler number. The dotted vertical line marks the laser-driven flow Eu, while the horizontal dashed lines correspond to the deduced minimum and maximum stream velocity values of the YSOs in the range relevant to the laboratory plasma stream.