Ionic emission from and activity evolution in comet C/2020 F3 (NEOWISE): Insights from long-slit spectroscopy and photometry

Open Access

Fig. 18

Modelling of the $N_{2}^{+}$ ${\rm{N}}_{\rm{2}}^{\rm{ + }}$ emission bands. Panel A corresponds to $N_{2}^{+} {/CO}^{+} = 2.4 \times 10^{- 2}$ ${\rm{N}}_{\rm{2}}^{\rm{ + }}{\rm{/C}}{{\rm{O}}^ + } = 2.4 \times {10^{ - 2}}$ with the different species being represented separately. Panel Β corresponds to the same ratio, but only with the overall fît (red) obtained by adding the different fits for C₂, $N_{2}^{+}$ ${\rm{N}}_{\rm{2}}^{\rm{ + }}$ , CO⁺, and CN. Panels C and D correspond to $N_{2}^{+} {/CO}^{+} = 7.3 \times 10^{- 2}$ ${\rm{N}}_{\rm{2}}^{\rm{ + }}{\rm{/C}}{{\rm{O}}^ + } = 7.3 \times {10^{ - 2}}$ . The observed spectrum is shown in blue.

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