Table 4
Total column densities along the SW and NE lines of sight toward PKS 1830–211.
| Species | Column densities (cm-2) | Ratio | Reference | |
| SW | NE | SW/NE | ||
|
|
||||
| H I | 1.3 × 1021 | 2.5 × 1021 | 0.5 | (a) |
| ArH+ | 2.7 × 1013 | 1.3 × 1013 | 2.1 | (b) |
| OH+ | 1.6 × 1015 | 7.6 × 1014 | 2.2 | (c) |
| H2Cl+ | 1.4 × 1013 | 3.7 × 1012 | 3.8 | (d) |
| H2O+ | 2.7 × 1014 | 7.0 × 1013 | 3.9 | (c) |
| CH | 7.7 × 1014 | 3.5 × 1013 | 22. | (e) |
| HF | >3.4 × 1014 | 0.18 × 1014 | >19 | (f) |
|
|
||||
| H2 | ~2 × 1022 | ~1 × 1021 | ~20 | (e, g) |
Notes. Species are ordered with increasing SW/NE column density ratios.
Reference. (a) Koopmans & de Bruyn (2005); (b) Müller et al. (2015); (c) this work; (d) Muller et al. (2014b); (e) Muller et al. (2014a); (f) Kawaguchi et al. (2016); (g) the column densities of H2 were derived using CH and H2O as proxy, assuming canonical molecular abundances.
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