Open Access

Fig. 3


Download original image

Mole fraction of O2 in accreted ice vs the W/R ratio assumed in the parent body. The plots show, for a given W/R, how much accreted O2 is necessary to oxidize enough of the total sulfur content into a quantity of sulfates consistent with contemporary measurements (see last two columns of Table 1: 16% for the CM case, 39% for the CIcase). The green part of the diagram covers the estimated range of W/R in CM parent bodies, the blue part covers the estimated W/R for CI parent bodies. The CV curve corresponds to the quantity of O2 that would lead to the oxidation of 1% of sulfur into sulfates. The red overlay represents the range of O2 abundance in the ice of comet 67P/C-G (3.1 ± 1.1%) as observed by the Rosetta mission (Rubin et al. 2019).

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.