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Home All issues Volume 542 (June 2012) A&A, 542 (2012) L7 Full HTML

Table 2

Results of the OH line profile fitting.

Source υ0a FWHMb τmaxc NOHd
(Tmb,c)  [km s-1]  [1014 cm-2]
W49N 2.9 ± 1.9 13.4 ± 0.4 0.9 8.8 ± 4.6
(12.3 K) 12.3 ± 1.0 10.1 ± 1.1 10.1
36.8 ± 3.5 11.8 ± 4.4 1.8 1.6 ± 0.9
39.1 ± 1.3 2.8 ± 0.5 2.3 0.5 ± 0.1
60.5 ± 0.3 10.4 ± 3.9 2.5 2.0 ± 0.2
W51 7.2 ± 0.4 4.6 ± 2.2 2.9 0.66 ± 0.08
(8 K) 59.4 ± 3.3 16.8 ± 4.5 5.2 5.6 ± 2.1
68.2 ± 1.4 4.6 ± 2.7 1.9
G34.26+0.15 12.6 ± 0.2 5.7 ± 0.8 2.5 1.12 ± 0.21
(9 K) 28.3 ± 0.5 6.0 ± 1.6 1.4 0.67 ± 0.09
55.4 ± 0.4 12.9 ± 1.0 4.8 4.73 ± 1.20

Notes. 

a

lsr velocity of component. The first and third hyperfine component (hfc) are  + 2.2 and  −4.4 km s-1, respectively, off the second one.

b

FWHM of Gaussian absorption profile, deconvolved from hfc split.

c

Peak opacity in the strongest hfc. The saturated absorption towards W49N (υlsr  <  25 km s-1) provides only a lower opacity limit.

d

Column density per fitted velocity component.

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