On the accretion process in a high-mass star forming region - A multitransitional THz Herschel-HIFI study of ammonia toward G34.26+0.15

M. Hajigholi; C. M. Persson; E. S. Wirström; J. H. Black; P. Bergman; A. O. H. Olofsson; M. Olberg; F. Wyrowski; A. Coutens; Å. Hjalmarson; K. M. Menten

doi:10.1051/0004-6361/201526451

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Volume 585 (January 2016)

A&A, 585 (2016) A158

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Table 3

Results from Gaussian fits, T_l, ΔV, and V_LSR for the emission, calculated peak opacities, τ_p, integrated opacities, , and column densities of the absorbing material in respective lower state, N_l.

	Freq.	T _l ^a	ΔV ^b	V _LSR	τ _p ^c	^c	N _l ^d
	(GHz)	(K)	(km s^-1)	(km s^-1)		(km s^-1)	(cm^-2)

o-NH₃	572.498	−0.7 ± 0.1	3.8 ± 0.3	60.3 ± 0.3	1.3	5.4	2.0e13
		−0.1 ± 0.1	2.1 ± 0.9	61.4 ± 0.3	0.2	≲0.4	≲1.5e12
		1.85 ± 0.01	4.2 ± 0.07	55.55 ± 0.04		...	...
		0.14 ± 0.01	10.0 ± 0.8	69.5 ± 0.3		...	...
	1214.853	−1.7 ± 0.1	4.5 ± 0.9	60.5 ± 0.4	0.5	2.3	1.3e13
		−0.6 ± 0.4	2.4 ± 0.7	63.1 ± 0.3	0.2	≲0.4	≲2.2e12
		1.2 ± 0.1	4.3 ± 0.4	55.9 ± 0.3		...	...
	1763.524	−0.92 ± 0.2	2.2 ± 0.5	60.8 ± 0.1	0.2	0.4	2.2e12
		−1.7 ± 0.1	2.2 ± 0.1	62.8 ± 0.1	0.3	0.7	4.1e12
		0.10 ± 0.08	4.2 ± 18	56.8 ± 6.7		...	...

p-NH₃	1168.452	−3.2 ± 0.1	4.3 ± 0.3	60.6 ± 0.1	1.3	5.7	4.2e13
		−0.4 ± 0.3	3.1 ± 0.7	63.8 ± 0.6	0.1	≲0.3	≲2.6e12
		1.03 ± 0.04	3.1 ± 0.2	55.8 ± 0.1		...	...
	1215.246	−3.3 ± 0.3	4.3 ± 0.3	60.4 ± 0.2	1.4	5.4	4.0e13
		−0.9 ± 0.6	3.1 ± 0.7	63.5 ± 0.8	0.2	≲0.9	≲6.6e12
		1.07 ± 0.04	3.5 ± 0.3	55.8 ± 0.1		...	...
	1763.601	−1.04 ± 0.05	2.3 ± 0.2	60.6 ± 0.2	0.2	0.4	2.8e12
		−1.60 ± 0.05	2.2 ± 0.1	62.9 ± 0.2	0.3	0.6	4.4e12
		0.29 ± 0.02	3.9 ± 0.8	56.8 ± 0.2		...	...
	1763.823	−2.85 ± 0.04	4.1 ± 0.2	60.9 ± 0.1	0.6	2.5	2.7e13
		−1.1 ± 0.2	2.0 ± 0.2	63.3 ±0.1	0.2	0.4	4.2e12
		0.27 ± 0.04	1.7 ± 0.4	56.2 ± 0.1		...	...

Notes.

^(a)

Amplitude of Gaussian fit. A negative value represents absorption and a positive value emission.

^(b)

Line width from Gaussian fit.

^(c)

Estimated with Eq. (1).

^(d)

Estimated with Eq. (2), and listed as upper limits for components that are not statistically significant in the Gaussian fitting.

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