The chemistry and spatial distribution of small hydrocarbons in UV-irradiated molecular clouds: the Orion Bar PDR

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This article has an erratum: [https://doi.org/10.1051/0004-6361/201424568e]

Table 7

Observed and best isobaric PDR model column densities.

	Observed	Model^a

	log₁₀(N )	log₁₀(N )
	[cm^-2]	[cm^-2]

C₂H	14.6	14.1^b–14.8^c
l-C₃H⁺	11.7	12.0^b–12.7^c
c-C₃H₂	13.1	12.2^b–12.9^c
l-H₂C₃	11.6	11.3^b–12.0^c
c-C₃H	12.3	11.3^b–12.0^c
l-C₃H	11.8	11.1^b–11.9^c
C₄H	13.6	12.3^b–13.1^c

Notes.

^(a)

Isobaric model with P = 10⁸ K cm^-3 and χ = 2 × 10⁴. Column densities integrated up to N(H₂)(face-on) ⋍ 10²² cm^-2.

^(b)

Face-on configuration.

^(c)

Column densities for an inclination angle of α ⋍ 11° with respect to an edge-on geometry.

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