Table 2
Abundance ratios of H79+81Br (≡B) upper limit column density with H2, CH3 OH, H2 O, HF, and H35+37Cℓ (≡HCℓ) for Orion KL, Sgr B2(N), and NGC6334I, compared with abundance ratios derived for 67P/C-G.
| Source | B/H2 | B/H2 O | B/CH3OH | B/HF | B/HCℓ |
|---|---|---|---|---|---|
| Orion KLa Plat. | ≤8.9×10−11 | ≤1.9×10−5 | – | ≤1.2×101* | ≤1.3×10−2 |
| Orion KL HC | ≤3.1×10−10 | ≤4.8×10−7 | ≤1.4×10−4 | – | – |
| Orion KL CR | ≤2.3×10−10 | ≤4.9×10−5 | ≤1.9×10−4 | – | – |
| Sgr B2(N)b HC | ≤6.5×10−11 | ≤1.0×10−2 | ≤1.0×10−4 | – | – |
| Sgr B2(N) env. | – | – | ≤1×10−3 | ≤1.1×10−1* | ≤6.9×10−2* |
| NGC6334Ic HC | ≤8.4×10−11 | ≤4.4×10−5 | ≤6.6×10−6 | – | ≤4.8×10−1 |
| NGC6334I env. | – | – | – | ≤2.0×10−1* | ≤9.3×10−1* |
| 67P/C-Gd | – | 4.5 10−6 e |
1.4 10−3 |
1.7 10−2 |
4.8 10−2 |
Notes.Plat. – Plateau, HC – Hot Core, CR – Compact Ridge, env. – envelope. (a) Crockett et al. (2014a); (b) Neill et al. (2014); (c) Zernickel et al. (2012); (d) Dhooghe et al. (2017); (e) Br/O elemental ratio, O has contributions of water, but also CO, CO2 and O2; * indicates values based on an upper limit in absorption, other values are based on the emission upper limits.
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