Global SED of the whole region of RCW 36 obtained from the aperture radius of 25′ at the center position of RA = 8:59:30.963, Dec = −43:46:56.270 (J2000.0). To obtain the eight-free parameters, the SED fitting was performed for the original seven-band data plus IRAS 25 μm, 60 μm, and 100 μm data. The thick solid line shows the best-fitting model, which is described in Eq. (1). The very cold dust, cold dust, warm dust, and PAH components are denoted by thin solid, dashed, dash-dotted, and dotted lines, respectively.