14NH, 14ND, and 15NH cometary fluorescence models and D/H measurement in NH

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Fig. 6

Modeled ¹⁴ND spectrum in green compared to the modeled ¹⁴NH spectrum for R_h = 0.68 au and ${\dot{R}}_{h}$ $\[\dot{R}_{h}\]$ = 15.8 km s⁻¹ (values of the observed spectrum of T7). The intensity of the ¹⁴ND model is based on a ¹⁴ND/¹⁴NH ratio of 1. Notice the clear shift between the ¹⁴ND and the ¹⁴NH spectra that allows us to measure the ¹⁴ND/¹⁴NH ratio in Section 5.1.

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