Core masses against nearest-neighbor separations from the minimum spanning tree analysis. The full pentagons show the results estimated assuming constant temperatures (T_{20 K}) whereas the crosses present the data assuming the temperatures derived from the H₂CO line data (). The full line corresponds to the Jeans lengths and Jeans masses calculated at 20 K for a density grid between 5 × 10³ and 10⁶ cm⁻³. For comparison, the dashed line corresponds to the Jeans lengths and Jeans masses calculated at a fixed density of 5 × 10⁵ cm⁻³ with temperatures between 10 and 200 K. The error-bars in the top-right correspond to a factor 2 uncertainty for masses and 1 kpc distance uncertainty for the nearest-neighbor separations (resulting in the different error-bar end markers for the separations).