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Table 5
Column densities of OH+, C+ and CH+ where detected, and 3σ upper limits on CH and HCO+ column densities.
| Source | N(OH+) | N(CH+) | N(C+) | N(HCO+) | N(CH) |
| (cm-2) | (cm-2) | (cm-2) | (cm-2) | (cm-2) | |
|
|
|||||
| IRAS 2A | 2.2 × 1013 | <4.2 × 1011 | 3.9 × 1017 | <8.0 × 1013 | <3.7 × 1014 |
| IRAS 4A | 1.5 × 1013 | <6.4 × 1011 | <9.6 × 1016 | <6.6 × 1013 | <3.1 × 1014 |
| IRAS 4B | 7.5 × 1012 | 1.8 × 1012 | <3.9 × 1017 | <2.0 × 1014 | <9.4 × 1014 |
| SMM1 | 3.3 × 1013 | 2.4 × 1013 | 4.2 × 1016 | <3.3 × 1014 | <1.5 × 1015 |
| SMM3 | ... | ... | ... | <1.1 × 1015 | <4.9 × 1015 |
Notes. OH+ and CH+ are from Benz et al. (in prep.). SMM3 was not targeted for observations of OH+, CH+ and C+.
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