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Fig. A.2

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HCN level (J = 0 to 5) population variation as a function of cometocentric radius, for the time-dependent modelling (see Fig. A.1) adopting the parameters for fragment B of 73P/Schwassmann-Wachmann during its 2006 passage. The level populations have been normalised to their SE-values to visualise time-dependent effects. The vertical dotted lines correspond to radii RCS and 2RCS between which the electron temperature increases from 90 K to 104 K.

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