Fig. 1

Spectral energy distribution (SED) of CB 26. The red squares and green dots with error bars represent the observational data (Table 1). The dashed black line shows our best-fit model SED. The dashed-dotted blue line represents the adopted contribution from free-free emission. The dotted red line correspondsto the sum flux of dust and free-free emission between 2.9 mm and 4.0 cm. The jump in the SED at ~103 μm is due to the transition from total flux measurements at shorter wavelengths to interferometric data at longer wavelengths, which do not recover the total flux from the extended envelope emission.
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