Mass versus size diagram for all 1768 starless cores (triangles) identified with Herschel in Orion B, including the 804 candidate prestellar cores (light or dark blue triangles) and 490 robust prestellar cores (filled triangles in dark blue). The core FWHM sizes were measured with getsources in the high-resolution column density map (Fig. 2 left) and deconvolved from an 18.2′′ (HPBW) Gaussian beam. The corresponding physical resolution atd = 400 pc is marked by the vertical dashed line. Models of critical isothermal Bonnor–Ebert spheres at T = 7 K and T = 20 K are plotted as black solid lines for comparison. The diagonal dotted line and yellow band display the observed mass-size correlation of diffuse CO clumps (Elmegreen & Falgarone 1996).