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Composition-dependent outgassing of comet 67P/Churyumov-Gerasimenko from ROSINA/DFMS. Implications for nucleus heterogeneity?

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Figure

Fig. 1. Typical high-resolution mass spectra of ROSINA / DFMS at m / z = 27, 28, 30, and 32, with the well-resolved peaks of HCN and C 2 H 3 at m/z = 27 (top left); CO, N 2 and C 2 H 4 at m/z = 28 (top right);
Fig. 4. Same as Fig. 2, but for October 11, 2014. Rosetta’s distance from the nucleus was 14.3 km at a heliocentric distance of 3.20 AU
Fig. 5. Scatter plots of HCN (top), C 2 H 6 (upper middle), CH 3 OH (lower middle), and CH 4 (bottom) versus H 2 O.
Table 1. Viewing geometry at the discrete maxima identified for the time periods studied.

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