Effect of the central luminosity, L_★, on the RATD of dust grains, at 0.87 mm, with the fixed parameters of a_max = 50 µm and f_high−J = 1. Each plot is a 2D slice taken at the center of the core in our radiative transfer results. Each column is one radiative transfer run of POLARIS, with L_★ = 1, 5, 20, 50, and 100 L_⊙. The first row is the a_align parameter, i.e., the dust grain size above which dust grains are considered aligned in our radiative transfer calculations. The second and third rows are the a_disr and a_disr,_max parameters, respectively. In RATD theory, these two values correspond to the window in grain size, inside which dust grains are rotationally disrupted. The last row indicates whether dust grains are rotationally disrupted in our models for S_max = 10⁵ erg cm⁻³, i.e., if the intervals [a_align; a_max] and [a_disr; a_disr,max] overlap. For a given pixel, if there is an overlap, the pixel is black (i.e., grains are disrupted). If it is not the case, it is white (i.e., grains are not disrupted).