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Table 4.

RADEX parameters used to constrain the gas properties of the extended emission component.

Variable Trialled range Constrained range
Gas density/cm−3 102 − 108 3.5 × 103 − 1.7 × 104
N(C2H)/cm−2 1012 − 1018 1013 − 1018
Gas temperature/K 10−300 50−300

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