Far-infrared to submm/mm SEDs of α Cen A (left) and α Cen B (right), where blue and red symbols identify the respective ALMA measurements. Observational rms-errors are given by solid bars and maximum absolute uncertainties of the ALMA data as dots, where relative values are ≤ 15% for Band 9, ≤ 7% for Band 7, and ≤ 5% for Band 3. With the exception of the point at 70 μm, the data shown by black symbols are based on unresolved single-dish observations (see the text). The extrapolations longward of 45 μm of the PHOENIX model atmospheres (Brott & Hauschildt 2005) are indicated by the dashed lines.
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