Correlation between the sample C overdensity and the segments of Palicio et al. (2023) spiral arms in the Galactic disc. Left panel: Overdensity map of sample C with V_ϕ ≤ 210 km/s. Here, 13566 stars are considered. The black contours indicate the position of the spiral arms obtained using the sample of giant stars (Palicio et al. 2023). The position of the Sun is indicated by the black cross at (X, Y) = (0, 0) kpc. Right panel: Identical to the left panel, with grey circular outlines that include stars with G ≤ 9, 10, 11, 12 and 13 mag (for the tightest to widest circles).