JWST observations of photodissociation regions - I. Aliphatic and aromatic carbonaceous dust, ices, and gas-phase spectral line inventory

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Volume 700 (August 2025)

A&A, 700 (2025) A158

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Table 6

Aromatic and aliphatic band strengths.

	Aromatic			Aliphatic

Region^a	I(3.3 μm)^b	I(4.4 μm)^b	N_D/N_H	I(3.4 μm)^b	I(4.7 μm)^b	N_D/N_H	N_H,aliph/N_H,arom
	NGC 7023

ATM	9.72 ± 0.11	0.36 ± 0.04	0.047 ± 0.025	1.14 ± 0.11	. . .	. . .	0.062 ± 0.012
DF1	27.66 ± 0.64	0.48 ± 0.13	0.022 ± 0.013	8.65 ± 0.57	1.01 ± 0.11	0.169 ± 0.087	0.166 ± 0.030
DF2	15.79 ± 0.31	0.19 ± 0.06	0.015 ± 0.009	4.97 ± 0.37	0.92 ± 0.06	0.269 ± 0.137	0.167 ± 0.031
MOL	5.02 ± 0.05	0.11 ± 0.02	0.028 ± 0.015	1.18 ± 0.07	0.38 ± 0.02	0.305 ± 0.154	0.125 ± 0.024
DF3	7.45 ± 0.08	0.16 ± 0.03	0.027 ± 0.015	3.26 ± 0.13	0.38 ± 0.03	0.169 ± 0.086	0.233 ± 0.041
	Horsehead

H II	0.045 ± 0.002	. . .	. . .	. . .	. . .	. . .	. . .
DF1	0.169 ± 0.004	. . .	. . .	0.063 ± 0.005	0.002 ± 0.001	0.046 ± 0.033	0.198 ± 0.037
MO1	0.191 ± 0.002	. . .	. . .	0.071 ± 0.004	0.006 ± 0.001	0.123 ± 0.065	0.197 ± 0.035
DF2	0.470 ± 0.008	. . .	. . .	0.243 ± 0.012	0.018 ± 0.002	0.108 ± 0.055	0.274 ± 0.049
MO2	0.095 ± 0.002	. . .	. . .	0.028 ± 0.004	0.007 ± 0.001	0.363 ± 0.196	0.156 ± 0.035

Notes. ^aSee Fig. 1 for physical location of region. ^bObserved energy flux in 10⁻¹⁴ erg s⁻¹ cm⁻² arcsec⁻².

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