Table A.2
Weeds parameters and results of the population-diagram analysis for IRAS 2A.
| Moleculea | Sizeb (″) | Trot,Wc (K) | Trot,PDd (K) | Ntot,We (cm−2) | Ntot,PDf (cm−2) | Δνg (km s−1) | νoffh (km s−1) |
|---|---|---|---|---|---|---|---|
| CH3OH, v = 0, v = 1, v = 2 | 0.2 | 180 | 181±8 | 1.4(19) | (1.9 ± 0.5)(19) | 3.6 | −0.8 |
| 13CH3OH, v = 0, v = 1 | 0.2 | 140 | 143 ± 8 | 6.5(17) | (6.9 ± 1.2)(17) | 3.6 | −0.8 |
| CH3CN, v = 0, v8 = 1 | 0.2 | 240 | 242 ± 23 | 6.0(16) | (8.3 ± 2.8)(16) | 3.6 | −0.8 |
| 13CH3CN, v = 0 | 0.2 | 240 | 240 | 2.0(15) | (2.4 ± 0.2)(15) | 3.6 | −0.8 |
| CH313CN, v = 0 | 0.2 | 240 | 244 ± 74 | 2.0(15) | (2.9 ± 1.6)(15) | 3.6 | −0.8 |
| CH318OH, v = 0 | 0.2 | 140 | 135±20 | 7.0(16) | (9.1 ± 2.8)(16) | 3.6 | −0.8 |
Notes. (a) COMs and the vibrational states detected and used to derive population diagrams. (b)Assumed size of the emitting region. (c)Rotational temperature used for the Weeds model. (d) Rotational temperature derived from the population diagram. When a value has no error, Trot,PD was fixed. (e)Column density used for the Weeds model. (f)Column density derived from the population diagram. (g) F W H M of the spectral lines. (h)Offset from the source systemic velocity (see Table 1).
Values in parentheses show the decimal power, where x (z) = x × 10 z or (x ± y)(z) = (x ± y) × 10 z. An upper limit on Ntot,W indicates that the molecule is not detected. Upper limits were derived from Weeds models, where all parameters, but column density, were fixed and the column density was chosen so that no transition exceeds a 3σ threshold, where σ is the rms noise level from Table A.1.
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