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Table A.2

Physical properties of the CO, HI, and HII gas.

Regiona lb bc Sized Mean column density (1022 cm −2)e Total proton densityf Total massg
(deg) (deg) (arcmin) N(H2) N(HI) N(HII) np(cm−3) M(105 M)
Ellipse E1 337.82 − 0.042 15 × 10 5.6 ± 1.3 0.44 ± 0.11 0.14 ± 0.04 950 ± 330 9.7 ± 4.0
Ellipse E2 337.81 − 0.017 26 × 20 4.9 ± 1.1 0.49 ± 0.12 0.21 ± 0.05 460 ± 160 32 ± 14

Notes. (a) Region name. See Fig. 3. (b,c)Galactic longitude and latitude. (d)Region size. (e) Mean column densities derived from the CO and the HI integrated intensity (in the −71 to −41 km s−1 range), and the ionised gas. (f)Proton density derived from the mean column densities in Col. 5 using Np = N(H2) + N(HI) + N(HII). (g) Total mass of gas in each selected region.

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