Scatterplots of o-H₂D⁺(1_1,0−1_1,1) velocity dispersion σ_V with respect to H₂ column density N(H₂) in AG351 (blue, top panels) and AG354 (red, bottom panels). In the left panels, N(H₂) is computed assuming a constant temperature of 10 K. In the right panels, we use the temperature derived pixel-per-pixel from the o- H₂D⁺(1_1,0−1_1,1) line width, in the hypothesis of only thermal contributions. In order to allow an easier comparison between the two clumps, the plot ranges are kept equal in the corresponding panels. For the sake of readability,we only show data-points for which the relative 95% HPD interval derived with MCWEEDS is < 50%. The black stars show the average values referring to the H₂D⁺-identified cores, for which the continuum flux is significantly detected. The σ_V values are taken from Table 2, while the N(H₂) values are computed as averages in each core.