Open Access
Table 5
Statistical isotopic fractionation ratios for molecules whose column density has been estimated, for the LTE and non-LTE cases.
| Species | LTE ratio | Non-LTE ratio |
|---|---|---|
| D/H | ||
| CCD/CCH | 0.026 ± 0.002 | – |
| c-C3HD/c-C3H2 | 0.036 ± 0.006 | – |
| c-C3D2/c-C3H2(a) | ≤0.09 | – |
| l-C3HD/l-C3H2 (a) | ≤0.33 | – |
| l-C3D2/l-C3H2 (a) | ≤0.51 | – |
| CH2DCCH/CH3CCH | 0.061 ± 0.015 | – |
| CH3CCD/CH3CCH (a) | ≤0.078 | – |
| DCN/HCN | <0.043 | <0.162 |
| DCN/(H13CN ×68) | 0.031 ± 0.003 | – |
| DNC/HNC | - | <0.117 |
| DNC/(HN13C ×68) | 0.058 ± 0.028 | 0.037 ± 0.011 |
| DC3N/HC3N | 0.034 ± 0.003 | – |
| D2CO/H2CO | <0.35 | – |
| HDCS/H2CS (a) | ≤0.095 | – |
| D2CS/H2CS (a) | ≤0.36 | – |
| DCO+/(H13CO+ ×68) | 0.011 ± 0.003 | – |
| 12C/13C | ||
| CCH/C13CH | 90 ± 8.4 | – |
| CCH/13CCH (a) | ≥211 | – |
| c-C3H2/c-HCC13CH | 72.2 ± 10.4 | – |
| CS/13CS | >16.4 | > 10.0 |
| HCN/H13CN | >49.2 | - |
| HNC/HN13C | – | >21.4 |
| HC3N/H13CCCN | 31.8 ± 14.6 | – |
| HC3N/HC13CCN | 56.5 ± 32.9 | – |
| HC3N/HCC13CN | 48.6 ± 9.9 | – |
 |
>20.0 | – |
| 14N/15N | ||
| HCN/HC15N | >157.9 | – |
| (H13CN ×68)/HC15N | 217.0 ± 54.4 | – |
| (HN13C ×68)/H15NC | 367.2 ± 50.8 | – |
| 16O/18O | ||
| H2CO/H2C18O (a) | ≥65 | – |
| (H13CO+ ×68)/HC18O+ | 1033 ± 190 | – |
| 32S/34S, 32S/33S | ||
| CS/C34S | >8.6 | >12.5 |
| CS/C33S | >57.1 | – |
| C34S/C33S | 6.7 ± 0.8 | – |
| SO/34SO | 24.5 ± 9.2 | – |
Notes. (a)We provide upper and lower limits for non-detected species (see Table 4).
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.