Table 3
Parameters of our best-fit LTE model of methylamine (with hyperfine structure) toward Sgr B2(NIS).
| Molecule | Status(a) | Ndet(b) | Size (c) (″) | Trot(d) (K) | N (e) (cm−2) | Fvib(f) | ΔV (g) (km s−1) | Voff (h) (km s−1) |  |
|---|---|---|---|---|---|---|---|---|---|
| CH3NH2, υ = 0 ⋆ | d | 10 | 2.0 | 230 | 1.4 (18) | 1.25 | 5.0 | 0.0 | 1 |
| υt = 1 | d | 5 | 2.0 | 230 | 1.4 (18) | 1.25 | 5.0 | 0.0 | 1 |
Notes. (a)d: 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)Emission size (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)Line width (FWHM). (h) Velocity offset with respect to the assumed systemic velocity of Sgr B2(N1S), Vsys = 62 km s−1. (i)Column density ratio, with Nref the column density of the previous reference species marked with a ⋆.
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