Fig. C.3
Measured wing intensity ratio as a function of the [12C II] line center optical depth and the S/N of the [13C II] line. Here, we assumed an abundance ratio α+ = 67, a channel width of 0.024Δv, and an intensity limit of 1.5σ of the noise.The noisy structure of the plot results from the random noise addition to the individual spectra.
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