Results from the radiative transfer models, plotted in magenta, over the IRAM-30 m spectrum of IRC+10216, the black histogram. The vertical scale is the antenna temperature in mK, and the horizontal scale is the frequency in MHz. Labels for the visible lines are plotted in red in each panel, where unidentified lines are labelled U lines. The last panel in the bottom-right corner of the figure displays the radial abundance profile in magenta, which we used as input to obtain the synthetic spectra shown in previous panels. The vertical scale of this last panel is the fractional abundance of CaNC relative to H2, and the horizontal scale is the radial distance to the star in arcseconds.
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