Fast fitting of spectral lines with Gaussian and hyperfine structure models

Open Access

Fig. 4

Distributions of $χ_{N}^{2}$ $\chi _{\rm{N}}^2$ values the fits of C¹⁸O spectra with Gaussian components. The noise in the upper frames is 3% of the maximum value of a spectrum and 10% in the lower frames. Results are shown for fits with one, two, or three Gaussian components (frames from left to right), and for N_iter = 1, 5, and 20 (grey, blue, and red histograms, respectively).

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