Table 2
Aperture parameters and values derived from the fit.
| Aperture | Coordinates | N(CH4) (1017 cm−2) | CH4:H2O (%) | CH4:CO2 (%) | CH4:CH3OH (%) | N(CO2) (1018 cm−2) | N(H2O) (1019 cm−2) | N(CH4)/N(H2O) (%) |
|---|---|---|---|---|---|---|---|---|
| total | 19:37:01.0868 | 5.0 | 64 | 32 | 4 | 2.8 | 1.2 | 4.3 |
| +07:34:08.9309 | ||||||||
| a | 19:37:01.1384 | 3.8 | 65 | 35 | – | 2.5 | 1.0 | 3.8 |
| +07:34:10.3022 | ||||||||
| b | 19:37:01.0348 | 5.6 | 70 | 30 | – | 3.1 | 1.2 | 4.8 |
| +07:34:10.3022 | ||||||||
| c | 19:37:01.1892 | 2.8 | 37 | 53 | 10 | 2.4 | 1.1 | 2.5 |
| +07:34:08.9298 | ||||||||
| d | 19:37:01.0868 | 4.1 | 52 | 34 | 14 | 2.2 | 1.2 | 3.4 |
| +07:34:08.9309 | ||||||||
| e | 19:37:00.9841 | 6.4 | 75 | 23 | 2 | 3.9 | 1.9 | 3.4 |
| +07:34:08.9298 | ||||||||
| f | 19:37:01.1375 | 4.1 | 74 | 26 | – | 2.4 | 1.3 | 3.1 |
| +07:34:07.5764 | ||||||||
| g | 19:37:01.0350 | 5.4 | 70 | 30 | – | 3.0 | 1.8 | 3.1 |
| +07:34:07.5764 |
Notes. The apertures are listed following the notation in Fig. 2. The coordinates are given for the aperture centers in the form of RA and Dec. N(X) denotes the column density of species X. The columns denoted CH4:X (X=H2O, CO2, and CH3OH) show the contribution of methane in a CH4:X mixture to the total CH4 column density listed in Col. 3. N(CH4)/N(H2O) is the CH4 abundance relative to solid H2O.
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