Small-scale physical and chemical structure of diffuse and translucent molecular clouds along the line of sight to Sgr B2

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Volume 623 (March 2019)

A&A, 623 (2019) A68

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Table 6

Physical sizes of cloud structures derived from two-point auto-correlation functions.

Velocity^a	c-C₃ H₂	H¹³CO⁺	¹³CO	CS	C³⁴ S	¹³CS	SO	SiO	HNC	HN¹³C	HC¹⁵N	CH₃OH
(km s⁻¹)
Galactic centre
− 105.9	> 0.55	0.55	> 0.53	> 0.55	0.45	0.16	n^*	0.29	>0.53	0.47	n^*	0.43
− 93.7	0.39	n^*	0.51^*	0.53	n^*	n^*	n^*	n^*	0.49	n^*	n^*	n^*
− 81.5	0.49	0.53	0.51	>0.55	0.47	n^*	n^*	0.12^*	>0.53	n^*	>0.57	n^*
− 74.6	0.51	0.55	>0.53	>0.55	0.31^*	0.08^*	n^*	0.08	>0.53	n^*	0.51	n^*
− 3.2	0.51	0.55	0.2	>0.55	n^*	n^*	0.26	0.53	>0.53	n	0.37	0.51
2.0	>0.55	>0.57	0.43	0.51	0.51	0.55	>0.55	>0.55	>0.53	0.22	0.53	0.53
7.3	> 0.55	> 0.57	0.51	> 0.55	0.51	0.55	> 0.55	> 0.55	> 0.53	0.55	0.51	0.53

3 kpc arm
− 48.4	0.38^*	n^*	>0.42	0.13	n^*	n^*	n^*	n^*	>0.42	n^*	n^*	n^*
− 39.7	>0.43	>0.45	>0.42	>0.43	0.4	n^*	>0.43	n^*	>0.42	n^*	0.42^*	n^*

4 kpc arm
− 27.6	0.31	0.31	>0.33	>0.34	n^*	n^*	n^*	n	>0.33	n^*	n^*	n^*
− 18.9	0.31	0.34	>0.33	>0.34	0.1^*	n^*	0.1	n^*	>0.33	n^*	n^*	n^*

Scutum arm
24.7	> 0.22	> 0.23	0.18	> 0.22	n^*	n^*	0.06	0.21	>0.21	n^*	n^*	0.21
31.6	> 0.22	0.04	0.2	0.21	n^*	n^*	0.07	0.03	>0.21	n^*	n^*	>0.22
36.9	> 0.22	0.03	0.17	0.21	0.07	n^*	n^*	0.07	>0.21	n^*	n^*	0.2

Sagittarius arm
17.7	0.08	>0.08	0.07	>0.08	0.04	n^*	0.06	>0.08	>0.08	0.04	0.05^*	0.07

Notes.The sizes are given in pc. Channels with unresolved structures are marked with n and channels with a S/N of smaller than 5 in the opacity maps are marked with a star. ^(a) Cloud centroid velocities derived from c-C₃ H₂.

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