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Table I.2

Mean () and median () widths of the Gaussians fitted to PDFs for each velocity component.

vLSRa b b
(km s−1)
Galactic centre
− 105.9 0.46 ± 0.11 0.47 ± 0.13
− 93.7 0.49 ± 0.10
− 81.5 0.45 ± 0.14
− 74.6 0.55 ± 0.13
− 3.2 0.43 ± 0.14
2.0 0.49 ± 0.14
7.3 0.43 ± 0.10

3 kpc arm
− 48.4 0.49 ± 0.17 0.44 ± 0.17
− 39.7 0.40 ± 0.15

4 kpc arm
− 27.6 0.39 ± 0.08 0.40 ± 0.07
− 18.9 0.41 ± 0.06

Scutum arm
24.7 0.49 ± 0.15 0.49 ± 0.14
31.6 0.47 ± 0.13
36.9 0.50 ± 0.14

Sagittarius arm

17.7 0.43 ± 0.12 0.43 ± 0.12

Notes. (a) Channel velocities of c-C3 H2. (b) Mean and median values for each sub-sample of clouds.

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