Spatial distribution of organics in the Horsehead nebula: Signposts of chemistry driven by atomic carbon

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Table 1

Observational parameters for the ALMA 7 m+30 m maps shown in Figs. 2 and B.2.

Species	Transition	Chan. Width (km s⁻¹)	Beam (″)	Beam PA °	Chan. rms (mK)	Mom. Zero rms (mK km s⁻¹)
C¹⁷O	J = 1–0	0.20	15.69 × 8.79	−73.43	55.52	27.20
CH₂CO	J_{K_a,K_c} = 5₁₅–4₁₄	0.20	17.08 × 9.70	−77.77	34.00	16.65
CH₃CHO	J_{K_a,K_c} = 5_14–43 (E)	0.20	17.28 × 9.85	−76.92	29.26	14.33
	J_{K_a,K_c} = 6₁₆–5₁₅ (E)	0.20	15.68 × 8.80	−73.36	47.74	21.35
	J_{K_a,K_c} = 6₁₆−5₁₅ (A)	0.20	15.68 × 8.80	−73.36	47.74	21.35
HNCO	J_{K_a,K_c} = 5₀₅–4₀₄	0.20	15.62 × 9.01	−77.83	53.71	26.31
HC₃N	J = 11–10	0.20	17.08 × 9.70	−77.78	35.82	17.55
CH₃CN	J_K = 6₀–5₀ (A)	0.20	15.52 × 8.91	−78.00	63.00	35.64
	J_K = 6₁–5₁ (E)	0.20	15.52 × 8.91	−78.00	63.00	35.64
	J_K = 6₂–5₂ (E)	0.20	15.52 × 8.91	−78.00	63.00	35.64

Notes. The projection center of the maps is $α_{2000} = 05^{h} 40^{m} 54_{\cdot}^{s} 555, δ_{2000} = - 02^{\circ} 27^{'} 48_{\cdot}^{''} 6$ $Mathematical equation: $\[\alpha_{2000}=05^{\mathrm{h}} 40^{\mathrm{m}} 54^{\mathrm{s}}_\cdot555, \delta_{2000}=-02^{\circ} 27^{\prime} 48^{\prime \prime}_\cdot 6\]$$ .

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