Table 2
Results from the PD analysis for the methanol and methyl cyanide deuterated isotopologues.
| Molecule | Nhc | Trot | Source size | N(XD)/N(XH) (a) | N(XD)/N(XH) (b) |
|---|---|---|---|---|---|
| (cm−2) | (K) | (′′) | (%) | (Single-dish, %) | |
| IRAS 2A | |||||
| CH3OH | ( )(+18) |
 |
 (c) |
– | – |
| 13CH3OH | ( )(+16) |
 |
 (c) |
– | – |
| CH2DOH | ( )(+17) |
 |
0.36 (d) |  |
 |
| CH3OD (P04 (e)) | ( )(+16) |
166 (f) | 0.36 (d) |  |
≤ 8 |
| CH3OD (J18 (e)) | ( )(+17) |
166 (f) | 0.36 (d) |  |
≤ 8 |
| CHD2OH | ( )(+17) |
 |
0.36 (d) |  |
 |
| CH3CN | ( )(+16) |
 |
0.36 (c) | – | – |
| CH2DCN | ( )(+14) |
130 (g) | 0.36 (g) |  |
– |
| IRAS 4A | |||||
| CH3OH | ( )(+19) |
 |
 (c) |
– | – |
| 13CH3OH | ( )(+17) |
 |
 (c) |
– | – |
| CH2DOH | ( )(+17) |
 |
0.20 (d) |  |
 |
| CH3OD (P04 (e)) | ( )(+17) |
152 (f) | 0.20 (d) |  |
 |
| CH3OD (J18 (e)) | ( )(+17) |
152 (f) | 0.20 (e) |  |
 |
| CHD2OH | ( )(+17) |
 |
0.20 (d) |  |
 |
| CH3CN | ( )(+16) |
 |
0.20 (c) | - | - |
| CH2DCN | ( )(+15) |
200 (g) | 0.20 (g) |  |
- |
| HH212 | |||||
| 13CH3OH | ( )(+16) |
 |
0.19 (h) | - | - |
| CH2DOH | ( )(+16) |
155 (i) | 0.19 (h) |  |
- |
| CH3OD (P04 (e)) | ( )(+15) |
155 (i) | 0.19 (h) |  |
- |
| CH3OD (J18 (e)) | ( )(+16) |
155 (i) | 0.19 (h) |  |
- |
Notes. (a) Column density ratio between a deuterated species and its main isotopologue. (b) From Parise et al. (2006). (c) From Taquet et al. (2015). (d) The source size was assumed to be equal to that of CH3OH. (e) P04 refers to the partition function computed by Parise (2004) within the rigid-rotor approximation, whilst J18 refers to the partition function used in Jørgensen et al. (2018) obtained from a scaling of that of CH
OH. (f) The rotational temperature was assumed to be equal to that of CH2DOH. (g) The rotational temperature was assumed to be equal to that of CH3CN. (h) From Bianchi et al. (2017). (i)The rotational temperature was assumed to be equal to that of 13CH3OH.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.