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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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