Table 5
Stages at which COMs in disks are dominantly formed.
| Fiducial | Higher | Higher | Higher | Higher | Shorter | |
|---|---|---|---|---|---|---|
| Species | case | cloud | prestellar | mol. cloud | cosmic-ray | prestellar |
| mass | density | temperature | ionization rate | duration | ||
| CH3CCH | Both | Both | Both | Both | Both | Late |
| C3H6 | Both | Both | Both | Both | Both | Late |
| CH3OH | Early | Early | Both | Early | Both | Late |
| CH3CHO | Both | Both | Both | Early | Both | Late |
| c-C2H4O | Late | Late | Late | Early | Late | Late |
| CH3OCH3 | Both | Both | Both | Early | Late | Late |
| C2H5OH | Early | Early | Both | Early | Late | Late |
| C2H3CHO | Late | Late | Late | Both | Late | Late |
| C2H5CHO | Late | Late | Late | Early | Late | Late |
| CH3COCH3 | Late | Late | Late | Early | Late | Late |
| HCOOCH3 | Late | Late | Late | Late | Late | Late |
| CH3COOH | Late | Late | Late | Early | Late | Late |
| HOCH2CHO | Late | Late | Late | Late | Late | Late |
| C2H5OCH3 | Late | Late | Late | Early | Late | Late |
| CH3OCH2OH | Late | Late | Late | Both | Late | Late |
| HOC2H4OH | Late | Late | Late | Late | Late | Late |
| HOCHCHCHO | Late | Late | Late | Late | Late | Late |
| CH3COCH2OH | Late | Late | Late | Late | Late | Late |
| CH3CN | Both | Both | Both | Early | Both | Late |
| CH3NC | Both | Both | Early | Early | Both | Late |
| NH2CHO | Late | Late | Late | Both | Late | Late |
| C2H3CN | Both | Both | Early | Early | Late | Late |
| C2H5CN | Late | Late | Both | Both | Late | Late |
| CH3NCO | Late | Late | Late | Both | Late | Late |
| HOCH2CN | Late | Both | Both | Early | Both | Late |
| CH3SH | Both | Both | Both | Both | Both | Late |
Notes. The horizontal lines separate the hydrocarbons, and the O-bearing, the N-bearing, and the S-bearing COMs. Early: species formed predominantly in the prestellar phase; Late: species formed mostly during the collapse; Both: species formed mostly during the collapse, but at least 10% formed in the prestellar phase.
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