Comparison between the C¹⁸O nonthermal velocity dispersion around each L1517 core and the predictions from a model of turbulent core formation. Top: schematic view illustrating how the velocity dispersion has been averaged inside four concentric shells around each core. Bottom: comparison between the observed C¹⁸O data (red solid triangles) and the predictions from the LSD model by Klessen et al. (2005). The black solid squares represent the three different projections of a fully subsonic core, while the open inverted triangles represent the three projections of a core that has transonic motions in one of them.