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Table 5

Physical conditions derived from the [C ii] spectra.

Source V LSR Width ∫ τδv Ntot(C+) a T kin b f(H2) c n d Lengthe L Filling
(1018 cm-2) s factorf
( 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)

Ntot(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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