Fig. 3.
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Large velocity gradient RADEX modeling of the CO (left) and [CI] (right) SLEDs. The red line shows the best RADEX single-component model (T = 41 K, nH2 = 8.5 × 103 cm−3). The gray line shows the best two-component model, which is the combination of low- (T = 34 K, nH2 = 3.1 × 103 cm−3; green) and high-excitation (T = 137 K, nH2 = 1.6 × 104 cm−3; red) components.
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