[C II] absorption and emission in the diffuse interstellar medium across the Galactic plane

M. Gerin; M. Ruaud; J. R. Goicoechea; A. Gusdorf; B. Godard; M. de Luca; E. Falgarone; P. Goldsmith; D. C. Lis; K. M. Menten; D. Neufeld; T. G. Phillips; H. Liszt

doi:10.1051/0004-6361/201424349

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Volume 573 (January 2015)

A&A, 573 (2015) A30

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Table 5

Physical conditions derived from the [C ii] spectra.

Source	V _LSR	Width	^∫ τδv	N_tot(C⁺) ^a	T _kin ^b	f(H₂) ^c	n ^d	Length^e	L	Filling
				(10¹⁸ cm^-2)				s		factor^f
	( km s^-1)	( km s^-1)	( km s^-1)		( K)		(cm^-3)	(pc)	( kpc)	(%)


W28A	[15;25]	4.9 ± 0.7	3.7 ± 0.5	0.58 ± 0.1	100	0.51	67 ± 10	24	1.1	2
W31C	[10,23]	10.0 ± 2.4	13.5 ± 3.0	1.9 ± 0.3	105	0.68	39 ± 5	85	1.5	6
	[23,34]	7.9 ± 1.8	12.9 ± 5	1.8 ± 0.4	100	0.74	38 ± 5	116	0.9	13
	[34,61]	11.8 ± 2.5	17.7 ± 3.7	2.5 ± 0.5	90	0.45	45 ± 5	107	1.3	8
G34.3+0.15	[8,20]	7.2 ± 1.5	5.0 ± 0.8	0.70 ± 0.1	95	0.52	63 ± 10	18	0.85	2
	[20,35]	7.5 ± 1.0	6.6 ± 0.7	0.92 ± 0.1	85	0.34	68 ± 10	30	1.0	3
W49N	[25,50]	12.8 ± 0.8	20.0 ± 0.9	2.8 ± 0.5	90	0.51	80 ± 10	43	1.8	2
	[50,80]	19.0 ± 1.0	27.0 ± 1.5	3.8 ± 0.3	100	0.59	38 ± 5	134	2.6	5
W51	[1,10]	4.5 ± 1	2.8 ± 0.3	0.39 ± 0.05	90	0.55	58 ± 5	13	0.7	2
	[10,16]	5.0 ± 1.0	1.4 ± 0.2	0.2 ± 0.05	150	0.19	56 ± 10	6	0.5	1
	[16,35]	10.6 ± 1	3.8 ± 0.5	0.53 ± 0.07	130	0.06	70 ± 5	11	1.5	1
DR21(OH)	[0,20]	6.1 ± 1.0	12.9 ± 1.5	1.8 ± 0.3	95	0.61	36 ± 5	81	0.9	9
W3-IRS5	[–25,–15]	1.3 ± 1.	0.78 ± 0.5	0.11 ± 0.06	40	0.52	560 ± 50	0.7	0.9	0.07

Notes.

^(a)

N_tot(C⁺) is the C⁺ column density in the diffuse gas along the line of sight to the background sources, computed for the given LSR velocity interval.

^(b)

HI data from the Galactic plane survey http://www.astro.uni-bonn.de/hisurvey/profile/index.php, and from Winkel et al. (in prep.).

^(c)

is the fraction of hydrogen in molecular form.

^(d)

n = n(H i) + n(H₂) is the gas density.

^(e)

is the total size of the CNM absorption features in the considered velocity interval.

^(f)

ff = s/L is the filling factor of the CNM absorption features in the considered velocity interval.

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