Comparison between the spectral energy distribution of the modeled core and L1544. The observed values for L1544 are indicated with black crosses and are taken from the work by Chacón-Tanarro et al. (2017). The blue line shows the SED for the core model computed using the standard OH94 dust opacities, while the orange line shows the SED when the dust opacities have been multiplied by a factor of 0.2 to match the continuum emission at 1.1 mm.