Increased complexity in interstellar chemistry: detection and chemical modeling of ethyl formate and n-propyl cyanide in Sagittarius B2(N)

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Volume 499 / No 1 (May III 2009)

A&A, 499 1 (2009) 215-232

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Table 15:

Peak gas-phase abundances from each model, with corresponding model temperatures, as well as source sizes, rotation temperatures, and gas-phase abundances derived from the observations of the main source in Sgr B2(N).
Species	Basic model		Select model		Observations			Abundance ratio
	$n[i]/n_{{{\rm H}}_2}$	T^a	$n[i]/n_{{{\rm H}}_2}$	T^a	Size	$T_{\rm rot}$	$n[i]/n_{{{\rm H}}_2}$	Select model
		(K)		(K)	( $\hbox{$^{\prime\prime}$ }$ )	(K)		over observation
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
HCOOH (hot)	5.4e-08	120	5.4e-08	120	5.0	70	1.3e-09	42
HCOOH (cold)	4.9e-09	42	4.9e-09	42	5.0	70	1.3e-09	3.8
CH₃OCHO	1.7e-07	81	1.6e-07	112	4.0	80	3.5e-08	4.6
C₂H₅OCHO	2.3e-09	110	2.3e-09	110	3.0	100	3.6e-09	0.6
C₂H₅OH	1.0e-07	120	1.0e-07	120	3.0	100	5.7e-08	1.8
CH₃OCH₃	2.3e-07	200	2.8e-07	200	2.5	130	1.4e-07	2.0
CH₃CN	6.3e-09	92	6.8e-09	92	2.7	200	1.3e-07	0.05
C₂H₅CN	4.4e-08	117	3.3e-09	117	3.0	170	8.1e-08	0.04
C₃H₇CN	3.5e-08	120	4.0e-11	123	3.0	150	1.0e-09	0.04
NH₂CH₂CN	1.4e-08	117	1.2e-08	117	2.0	100	1.5e-09	8.0
C₂H₃CN	1.2e-08	200	5.1e-08	92	2.3	170	4.7e-08	1.1

Notes: ^a The model temperatures are the temperatures at which the peak gas-phase abundances are achieved.

Source LaTeX | All tables | In the text

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