Brightness temperature profile of the passive disk model (p = 0, τ_10,B4 = 3 and p_d = 3.5) with (top) and without (bottom) scattering with different a_max. The transparent shaded region shows the observed brightness temperature. The model brightness temperature is calculated after the intensity is convolved with the beam size of 0″.1 which corresponds to the physical distance of 13.2 au. The black dotted line denotes the midplane temperature profile convolved with a Gaussian with a full width at half maximum (FWHM) of 13.2 au.