Table 2
Division of molecules into “hot” and “cold” from the interferometric observations of IRAS16293 (this study) and high-mass hot cores (Bisschop et al. 2007), an indication of whether or not the species are detected in the single-dish study of IRAS16293 (Jaber et al. 2014) and the binding energies of each species (from the tabulation by Garrod 2013).
| Species | IRAS16293 | High-mass hot cores | Binding energya | ||
|---|---|---|---|---|---|
| Interferometric | Single-dish | (K) | |||
| Formaldehyde | H2CO | Cold | + | Cold / Hot | 2050 |
| Ketene | CH2CO | Cold | + | Cold | 2200 |
| Acetaldehyde | CH3CHO | Cold | + | Cold | 2775 |
| Dimethyl ether | CH3OCH3 | Cold | + | Cold / Hotb | 3675 |
| Methyl formate | CH3OCHO | Hot | + | Hot | 5200 |
| Methanol | CH3OH | Hot | + | Hot | 5530 |
| Formamide | NH2CHO | Hot | + | Hot | 5560 |
| Formic acid | HCOOH | Hot | − | Cold | 5570 |
| Ethanol | C2H5OH | Hot | − | Hot | 6260 |
| Glycolaldehyde | CH2OHCHO | Hot | − | – | 6680 |
| Ethylene glycol | (CH2OH)2 | Hot | − | – | 10200 |
Notes. (a) The listed binding energies for pure ices (Garrod 2013). (b)Although, dimethyl ether is classified as hot in Bisschop et al. (2007), temperatures of 80–130 K are found toward SgrB2(N) (Belloche et al. 2013) and G327.3−0.6 (Bisschop et al. 2013), i.e. relatively “cold” compared to other species.
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