Cosmo-tomography toward PKS 1830−211: Variability of the quasar and of its foreground molecular absorption monitored with ALMA

Open Access

Fig. 14.

Time evolution of the eigenvalues of the first component (PC1) of the PCA decomposition of various subsets of the monitoring spectra. The line of sight, species, considered velocity interval, and PC1 scores are given in each box.

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