Table 6
Comparison of observed abundances of the chemical species in the envelope of DR21(OH) and other sources.
| Species | DR21(OH) | Lukewarm | Hot | |
| corinob | corinoc | |||
| N | X a | X | X | |
| cm-2 | × 10-9 | × 10-9 | × 10-9 | |
|
|
||||
| C3 | 2.2 × 1014 | 0.63 | ... | ... |
| CCH | 2.3 × 1015 | 6.6 | (5.3–12.8) | 0.05 |
| (87 GHz) | ||||
| CCH | 2.9 × 1014 | 0.8 | (5.3–12.8) | 0.05 |
| (524 GHz) | ||||
| c-C3H2 | 6.8 × 1013 | 0.19 | 0.22 | ...d |
Notes.
Estimated using N(H2) = 3.5 × 1023 cm-2 (Table 1).
Observations not available, Hassel et al. (2011) model (nH2 = 5 × 105 cm-3) predicts X(c-C3H2) ≈ 10-9 in lukewarm corinos (T ~ 30 K) and X(c-C3H2) ≈ 10-7 in hot cores (T ~ 100 K).
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