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Fig. B.2


Fractional abundances of some daughter species as a function of radius, calculated using different initial fractions of CH4 (panels a) and b)), atomic S (panel c)), and N2 (panel d)), in addition to various cosmic-ray rates. In panel a): the arrows indicate the upper limits of C2H (red) and CH3OH (green) deduced in the observational work of Marvel (2005) where the peak radii of these species was assumed to be 1.5 × 1016 cm. In panel b): χ is the scaling factor of the cosmic-ray ionization rate and the star indicates the observational result from Pulliam et al. (2011).

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