Open Access
Table 9.
COM abundances with respect to methyl formate.
| Molecule | Xmethylformate | |||||||
|---|---|---|---|---|---|---|---|---|
| LM | IM | HM | ||||||
| IRAS4A2a | IRAS16293Bb | IRAS2Aa | Cep E-A | NGC 7129c | G29.96d | Orion KLe | SgrB2(N1)f | |
| CH3OH | 39 | 51 | 63 | 46 | 50 | 5.2 | 21 | 41 |
| H2CO | 0.7 | 5 | 5.7 | 3.4 | 1.0 | − | − | 1.1 |
| H2CCO | 0.084 | − | 8.8(−2) | 3.1(−1) | − | − | 2.1(−3) | 1.4 |
| HCOOH | 0.13−0.24 | − | − | 3.2(−2) | 1.5 | − | 3.0(−2) | 3.5(−2) |
| CH3CHO | 0.29−0.54 | 1.8(−1) | − | 4.2(−1) | 1.0(−1) | − | 3.0(−3) | 3.2(−1) |
| CH3OCH3 | 0.9 | − | 6.3(−1) | 1.4 | 5.0(−1) | 2.5 | 5.9(−1) | 4.4 |
| CH3COCH3 | − | 4.0(−2) | − | (1.0−3.2)(−1) | 2.5(−2) | − | − | 3.5(−1) |
| HNCO | 0.066−0.11 | 7.5(−2) | − | 6.1(−2) | 4.0(−2) | − | 4.3(−1) | 2.9 |
| NH2CHO | 0.028−0.057 | 2.5(−2) | 1.5(−1) | 1.7(−2) | − | − | 4.3(−2) | 2.9 |
| CH3CN | 0.54−1.4 | 1.0(−1) | 2.5(−1) | 1.3(−1) | 3.0(−1) | 1.3(−1) | 1.9(−1) | 4.4 |
| C2H5CN | 4.1(−2) | 1.0(−2) | 1.9(−2) | (1.7−4.2)(−2) | 7.0(−2) | 1.3(−1) | 3.0(−1) | 4.1 |
Notes. Sources are ordered from left to right by increasing luminosity.
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