Assumptions to estimate the fraction of [C II] emission from the cold neutral medium (CNM).
|N(H I,PDR)||3.25 × 1020 cm−2|
|X(C+)||5.9 × 10−5|
Notes. N(H I,PDR) is the estimated column density of atomic hydrogen at the surfaces of the PDRs. X(C+) is the fractional abundance of C+, nCNM and TCNM are density and temperature of the CNM.
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