Table 5
Parameters of our best-fit LTE model of methanol, methyl mercaptan, and acetamide, and column density upper limit for thioacetamide, toward Sgr B2(N2).
| Molecule | Status (a) | Ndet (b) | Size (c) | Trot (d) | N (e) | Fvib (f) | ΔV (g) | Voff (h) |
|---|---|---|---|---|---|---|---|---|
| (′′) | (K) | (cm−2) | (km s−1) | (km s−1) | ||||
| CH3OH, v = 0 | d | 41 | 1.4 | 160 | 4.0 (19) | 1.00 | 5.4 | − 0.5 |
| CH3SH, v = 0 | d | 12 | 1.4 | 180 | 3.4 (17) | 1.00 | 5.4 | − 0.5 |
| CH3C(O)NH2, v = 0 | d | 10 | 0.9 | 180 | 1.4 (17) | 1.23 | 5.0 | 1.5 |
| CH3C(S)NH2, v = 0 | n | 0 | 0.9 | 180 | <1.6 (16) | 1.20 | 5.0 | 1.5 |
Notes. The parameters for methanol, methyl mercaptan, and acetamide were taken from Müller et al. (2016) and Belloche et al. (2017). (a)d: detection, n: non-detection. (b)Number of detected lines (conservative estimate, see Sect. 3 of Belloche et al. 2016). One line of a given species may mean a group of transitions of that species that are blended together. (c)Source diameter (FWHM). (d)Rotational temperature. (e)Total column density of the molecule. x (y) means x × 10y. (f)Correction factor that was applied to the column density to account for the contribution of vibrationally excited states, in the cases where this contribution was not included in the partition function of the spectroscopic predictions. (g)Linewidth (FWHM). (h)Velocity offset with respect to the assumed systemic velocity of Sgr B2(N2), Vsys = 74 km s −1.
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