Table 5
c-C3H2 inferred parameters and abundance ratio for c-C3H2/C2H.
| Position | Coordinates | 9–8/5–4 | 10–9/5–4 |  |
Tkin |  |
 |
c-C3H2/C2H | |
|---|---|---|---|---|---|---|---|---|---|
| RA | Dec | (cm−3) | (K) | (cm−2) | (cm−2) | ||||
| IRAS 16293−2422 | |||||||||
| South | 16:32:22.88 | −24:28:39.78 | 1.4 ± 0.07 | 1.7 ± 0.08 | 5–10 × 107 | 120 – 155 | 9.3 × 1013 | ≤3 × 1013 | ≥3.1 |
| Center | 16:32:22.69 | −24:28:35.16 | 1–6 × 107c | 50 – 120 | 5–7 × 1012 | 2 × 1014 | ≤0.035 | ||
| North | 16:32:22.55 | −24:28:30.28 | 1–6 × 107c | 50 – 120 | 5–7 × 1012 | 2 × 1014 | ≤0.035 | ||
| VLA 1623−2417 c-C3H2 60,6–51,5 | |||||||||
| c-C3H2d | 16:26:26.39 | −24:24:30.69 | ... | ... | 5–10 × 107 | 120–155 | 5.3–6.7 × 1010 | 3 × 1013 | 0.002e |
Notes. (a) For IRAS 16293−2422, column densities are for a beam of 0.5′′. For VLA 1623−2417, column densities are for a beam of 17.3′′, corresponding to the beam of the C2H observations. (b)An o/p = 3 was used to calculate the total column density of c-C3 H2. (c) Densities are assumed from the model envelope. (d) c-C3H2
and Tkin parameters taken from the south position of IRAS 16293−2422. (e) Due to the different scales being picked up by the observations, the ratio is not well determined, and is provided here for reference.
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