Fig. 2.
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Measurements of the continuum fluxes in the Red Rectangle, coming from the relatively extended dust emission (red) and the much more compact free–free emission (cyan). The cm-wave data (triangles) come from Jura et al. (1997), submm measurements (circles) are from Bujarrabal et al. (2013a,b, 2016), and this Letter. We also indicate the spectral indexes calculated from regression lines and the formal uncertainties.
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