Fig. 5
ALMA 2019 data: observed spectrum (black line) of SPW 6 across a frequency range covering the 13CH3CN JK = 13K–12K, K = 0–5, lines. The emission is averaged over a circle of 0.′′1 radius toward the center of the HC H II region. The fit (red histogram) of the 13CH3CN JK = 13K–12K, K = 0–5, lines performed with XCLASS is also reported.
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