Fig. 5

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HDCO spectrum (black) with a velocity resolution of 0.14 km s−1 for the 4(2,2)−3(2,1) transition overlaid with the best fit (pink) from our simultaneous radiative transfer analysis, extracted within the 4σ contour shown in Fig. 4. The analysis was run twice, assuming upper limits for the size of the emitting region of 1.0″ and 0.3″ for Sources A and B, respectively and lower limits of 0.5″ and 0.15″ for Sources A and B, respectively; the figure shown represents the latter. Dashed lines denote the previously identified velocity components at −2, 2.8 and 9.9 km s−1.
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