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Table 3

Initial abundances (per number of hydrogen atoms) used in the fiducial DALI chemical calculation.

Species Abundance Species Abundance
H2 0.5
He 0.14 JNH3 9.90 × 10−7
C 1.01 × 10−4 1.00 × 10−8
O 1.00 × 10−4 HCO+ 9.00 × 10−9
N 5.10 × 10−6 C+ 1.00 × 10−9
Mg 4.17 × 10−7 Mg+ 1.00 × 10−11
Si 7.94 × 10−7 Si+ 1.00 × 10−11
S 1.91 × 10−6 S+ 1.00 × 10−11
Fe 4.27 × 10−7 Fe+ 1.00 × 10−11
N2 1.00 × 10−6 PAH 6.00 × 10−7

Notes. The ions and PAH initialise the total charge and act as a sink for free electrons, respectively. A species with a J label denotes the ice phase of the given species.

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