Table 3
N (CH2DOH)/N (CH3OH) ratio at the centre of the pre-stellar core, rcen, and the radius of the methanol peak, rmax = 5200 AU.
| Model | t = 1 × 105 yr | t = 3 × 105 yr | t = 5 × 105 yr | t = 1 × 106 yr | ||||
|---|---|---|---|---|---|---|---|---|
| rcen | rmax | rcen | rmax | rcen | rmax | rcen | rmax | |
| (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | |
| 1D-1 | 3.8 | 3.3 | 5.4 | 4.6 | 6.2 | 5.0 | 6.6 | 5.1 |
| 1D-2 | 3.8 | 3.3 | 5.2 | 4.5 | 5.9 | 4.8 | 6.4 | 4.9 |
| 1D-3 | 3.0 | 0.5 | 3.3 | 1.1 | 2.4 | 1.6 | 4.8 | 4.2 |
| 1D-4* | 8.8 | 6.2 | 8.2 | 8.0 | 7.1 | 6.9 | 6.3 | 6.1 |
| 1D-4-1 | 16.1 | 4.5 | 8.0 | 7.3 | 8.1 | 7.5 | 7.7 | 7.2 |
| 1D-4-2 | 2.5 | 2.3 | 3.0 | 2.5 | 3.0 | 2.2 | 2.7 | 2.0 |
| 1D-5 | 1.1 | 0.2 | 1.3 | 0.5 | 1.7 | 1.3 | 2.0 | 2.3 |
| 1D-6 | 5.8 | 4.9 | 8.0 | 7.7 | 11.4 | 11.3 | 13.6 | 13.5 |
| 1D-7 | 0.1 | 0.04 | 0.2 | 0.04 | 0.2 | 0.04 | 0.1 | 0.03 |
| 1D-8 | 4.3 | 0.8 | 6.8 | 2.3 | 5.7 | 3.0 | 3.5 | 1.4 |
| 1D-9 | 7.0 | 1.4 | 2.7 | 1.1 | 3.4 | 2.2 | 6.3 | 5.5 |
| 1D-10 | 3.0 | 0.5 | 3.2 | 1.1 | 2.3 | 1.5 | 4.6 | 4.0 |
| 1D-11 | 3.0 | 0.5 | 4.3 | 1.4 | 2.2 | 1.4 | 4.9 | 4.2 |
| 1D-12 | 0.8 | 0.1 | 2.3 | 1.1 | 3.1 | 2.2 | 7.4 | 6.9 |
| 1D-13 | 3.9 | 0.7 | 2.7 | 1.0 | 2.3 | 1.5 | 4.3 | 3.7 |
Notes. The position of the methanol peak is determined by the profile of the fiducial model at the best-fit time. An overview of the chemical and physical properties of the various models is given in Table 2. The model marked with a star is the fiducial model and t = 3 × 105 yr is the best-fit time obtained as described in Sect. 3.1. The observed values are N (CH2DOH)/N (CH3OH)(rcen) = 7.1% ± 1.9% for the centre and N (CH2DOH)/N (CH3OH)(rmax) = 4.5% ± 1.2% for a radius of 5200 AU.
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