Table 1
List of lines detected at z = 0.89 toward the SW image of PKS 1830−211 and discussed in this paper.
| Rest | Sky freq. | Elowa | Sulb | Dipole | αc | ∫τdv d | Ncole | |
| Line | freq. | z = 0.88582 | (K) | moment | (1012 cm-2 km-1 s) | (km s-1) | (1012 cm-2) | |
| (GHz) | (GHz) | (Debye) | ||||||
|
|
||||||||
| HCN (2−1) | 177.26111 | 93.997 | 4.3 | 2.0 | 2.99 | 3.5 | – | – |
| HCO+ (2−1) | 178.37506 | 94.588 | 4.3 | 2.0 | 3.90 | 2.1 | – | – |
| SO (54–43) | 178.60540 | 94.710 | 15.9 | 4.9 | 1.54 | 141.8 | 0.24 | 34.0 |
| HOC+ (2−1) | 178.97205 | 94.904 | 4.3 | 2.0 | 2.77 | 4.1 | 1.04 | 4.3 |
| HNC (2−1) | 181.32476 | 96.152 | 4.4 | 2.0 | 3.05 | 3.4 | 41.9 | 142.5 |
| c-C3H2(para) (41,3-32,2) | 183.62362 | 97.371 | 16.1 | 2.4 | 3.43 | 59.7 | 0.23 | 13.7 |
| CF+ (2-1) | 205.17052 | 108.796 | 4.9 | 2.0 | 1.13 | 26.2 | 0.21 | 5.5 |
| CH3OH (11 A+-20 A+) | 205.79127 | 109.126 | 7.0 | 0.5 | 1.44 | 255.1 | 0.18 | 45.9 |
Notes. Frequencies and molecular data are taken from the Cologne Database for Molecular Spectroscopy (Müller et al. 2001).
α is defined as the conversion factor between integrated opacity and total column density Ncol = α × ∫τdv, calculated under the assumption that the rotational excitation is coupled with the cosmic microwave background temperature, 5.14 K at z = 0.89 (see, e.g., Muller et al. 2013).
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