Open Access
Table 8.
Molecular abundances with respect to H2 measured towards Cep-E A and a few protostars of low- (LM), intermediate- (IM) and high-mass (HM) reported from the literature.
| Molecule | X | |||||||
|---|---|---|---|---|---|---|---|---|
| LM | IM | HM | ||||||
| IRAS4A2a | IRAS16293Bb | IRAS2Aa | Cep E-A | NGC 7129c | G29.96d | Orion KLe | SgrB2(N1)f | |
| CH3OH | 4.3 (−7) | 1.7(−6) | 1.0(−6) | 1.2(−6)* | 1.0(−6)* | 6.7(−8) | 9.3(−8) | 1.4(−6) |
| H2CO | 8.2 (−9) | 1.6(−7) | 8.0(−8) | 8.8(−8)* | 2.0(−8)* | − | − | 3.9(−8) |
| H2CCO | 9.2 (−10) | − | 1.4(−9) | 8.0(−9) | − | − | 9.3(−12) | 4.6(−8) |
| HCOOH | (0.6−2.9)(−9) | − | − | 8.3(−10) | 3.0(−8)* | − | 1.3(−10) | 1.2(−9) |
| HCOOCH3 | 1.1(−8) | 3.3(−8) | 1.6(−8) | 2.6(−8) | 2.0(−8) | 1.3(−8) | 4.4(−9) | 3.4(−8) |
| CH3CHO | (1.1−7.4)(−9) | 5.8(−9) | − | 1.1(−8) | 2.0(−9) | − | 1.3(−11) | 1.1(−8) |
| CH3OCH3 | 1.0(−8) | − | 1.0(−8) | 3.6(−8) | 1.0(−8) | 3.3(−8) | 2.6(−9) | 1.5(−7) |
| CH3COCH3 | − | 1.4(−9) | − | (2.5−8.3)(−9) | 5.0(−10) | − | − | 1.2(−8) |
| HNCO | (0.3−1.4)(−9) | 2.5(−9) | − | 1.6(−9) | 8.0(−10) | − | 1.9(−9) | 1.0(−7) |
| NH2CHO | (1.2−6.7)(−10) | 8.3(−10) | 2.4(−9) | 4.5(−10) | − | − | 1.9(−10) | 1.0(−7) |
| CH3CN | (0.3−1.4)(−9) | 3.3(−9) | 4.0(−9) | 3.5(−9) | 6.0(−9)* | 1.7(−9) | 8.5(−10) | 1.5(−7) |
| C2H5CN | (1.7−5.6)(−10) | 3.0(−10) | 3.0(−10) | (0.45−1.1)(−9) | 1.4(−9) | 1.7(−9) | 1.3(−9) | 1.4(−7) |
Notes. Sources are ordered from left to right by increasing luminosity.
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.