The IRAM-30 m line survey of the Horsehead PDR - III. High abundance of complex (iso-)nitrile molecules in UV-illuminated gas

Free Access

Table 6

Best fit parameters for the radiative transfer modeling.

Position	Species	Smallest observed beam	log ₁₀N_{H_tot}	[e⁻] = n_e/n_H₂	T _K	log ₁₀n_H₂	log ₁₀N	log ₁₀X^a
		(′′)	(cm^-2)		(K)	(cm^-3)	(cm^-2)

HCO peak	CH₃CN	16.8	22.6	0	43 ± 1	4.3 ± 0.1	13.2 ± 0.2	− 9.4 ± 0.2
	CH₃CN	16.8	22.6	10^-4	45 ± 2	4.3 ± 0.3	13.0 ± 0.2	− 9.6 ± 0.2
	HC₃N	22.7	22.6	0	60 ± 11	4.7 ± 0.2	11.5 ± 0.1	− 11.1 ± 0.1
	HC₃N	22.7	22.6	10^-4	58 ± 11	4.6 ± 0.2	11.4 ± 0.1	− 11.2 ± 0.1

DCO⁺ peak	CH₃CN	16.8	22.8	0	33 ± 3	5.0 ± 0.2	11.7 ± 0.2	− 11.1 ± 0.2
	HC₃N	22.7	22.8	0	30 ± 6	4.8 ± 0.2	11.7 ± 0.2	− 11.1 ± 0.2

Notes. The left hand side of the table corresponds to fixed parameters, and the right hand side to computed values.

^(a)

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.