The first estimation of the ionization fraction in dense and translucent molecular gas across Orion B

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Table B.2

Parameters for the model predicted ionization fraction in dense and translucent gas from B21 derived using column density of molecular lines.

Dense medium	Coefficients
Tracer		a₀	a₁	a₂	a₃	a₄	a₅
N(CN(1−0))/N(N₂H⁺(1−0))		−7.561	0.7191	4.245(−2)	−5.030(−2)	1.433(−3)	1.432(−3)
Translucent medium	Coefficients
Tracer	f_max	a₀	a₁	a₂	a₃	a₄	a₅
N(C₂H)/N(HNC)	−3.525	−1.265	0.9225	−0.0424	−0.1323	0.0176	1.387(−2)

Notes. N(X) is the column density of the species X. Values that contain number in brackets should be multiplied by ten to the power of that number.

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