Best fit of the radio continuum spectrum is represented by a solid red line. The best parameters are listed in the lower left part of the figure along with the reduced chi-square (). The faint grey lines represent the randomly 1000 spectra generated in the fitting process. The free-free (thermal) and synchrotron (nonthermal) components of the models are depicted by the dotted cyan line and dashed green line, respectively. The green crosses represent the observed nonthermal component (i.e. the modeled thermal component removed from the observational data). The cyan stars delineate the observed thermal component (i.e. the modeled nonthermal component subtracted from the observational data). The thermal component is drawn only if the fitted coefficient, S_{th ,1 GHz}, is strictly positive. If present (curved, break, and cutoff models), the vertical dash-dotted yellow line depicts the break frequency, ν_b. The magenta line delineates a linear fit to the thermal flux densities.