Abstract
Observations of protonated HCN (HCNH+) in a selection of galactic molecular clouds are reported. This species plays a key role in understanding the chemistry of the important high density tracer HCN. HCNH+ has been detected in the nearby cold dust cloud TMC-1 with an ratio relative to HCN of [HCNH+]/[HCN] between 0.015 and 0.26 (preferred value 0.03) and tentatively in DR21(OH) with a ratio of approximately 0.01. This is about 100 times higher than the ratio of protonated carbon monoxide to CO [HCO+]/[CO], but comparable to the [HCS+]/[CS] ratio. Possible explanations of these high abundance ratios are discussed in the light of model calculations.
| Original language | English |
|---|---|
| Pages (from-to) | 487-496 |
| Number of pages | 10 |
| Journal | Astronomy and Astrophysics |
| Volume | 247 |
| Publication status | Published - 1991 |
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Schilke, P., Walmsley, C. M., Millar, TJ., & Henkel, C. (1991). PROTONATED HCN IN MOLECULAR CLOUDS. Astronomy and Astrophysics, 247, 487-496.