Table 4
[C/N] abundance ratios derived from [CII] and [NII] line observations of the AF.
| Source | Te | ne | c(ne,Te) | N(N+)s | N(N+)i | N(C+)s | N(C+)i | [C/N]s,s | [C/N]i,i |
|---|---|---|---|---|---|---|---|---|---|
| 10−16 | 1017 | 1017 | 1017 | 1017 | |||||
| (K) | (cm−3) | (cm−2) | (cm−2) | (cm−2) | (cm−2) | ||||
| P1-46 km s−1 | 5000 (a) | 100 (b) | 2.29 | 1.23 ± 0.08 | 2.93 ± 0.17 | 1.54 ± 0.11 | 3.91 ± 0.25 | 1.26 ± 0.12 | 1.33 ± 0.12 |
| P1-13 km s−1 | 5000 (a) | 100 (b) | 2.29 | 0.82 ± 0.09 | 2.93 ± 0.17 | 1.00 ± 0.12 | 3.91 ± 0.25 | 1.22 ± 0.20 | 1.33 ± 0.12 |
| P2-15 km s−1 | 5000 (a) | 100 (b) | 2.29 | 0.87 ± 0.06 | 3.11 ± 0.14 | 1.07 ± 0.08 | 4.16 ± 0.21 | 1.23 ± 0.13 | 1.34 ± 0.09 |
| W1-24 km s−1 | 5500 | 180 | 2.22 | 3.99 ± 0.13 | 5.17 ± 0.18 | 4.91 ± 0.18 | 6.49 ± 0.25 | 1.23 ± 0.06 | 1.25 ± 0.07 |
| W2-29 km s−1 | 5500 | 290 | 2.15 | 3.25 ± 0.12 | 5.11 ± 0.18 | 3.70 ± 0.14 | 6.00 ± 0.22 | 1.14 ± 0.06 | 1.17 ± 0.06 |
| G010-17 km s−1 | 5000 | 290 | 2.15 | 2.08 ± 0.09 | 5.10 ± 0.17 | 2.30 ± 0.11 | 5.98 ± 0.21 | 1.10 ± 0.07 | 1.17 ± 0.06 |
| G007-16 km s−1 | 6700 | 270 | 2.19 | 1.64 ± 0.09 | 4.16 ± 0.17 | 1.81 ± 0.11 | 4.91 ± 0.22 | 1.11 ± 0.09 | 1.18 ± 0.07 |
| G007-41 km s−1 | 6700 | 270 | 2.19 | 0.83 ± 0.09 | 4.16 ± 0.17 | 0.88 ± 0.10 | 4.91 ± 0.22 | 1.06 ± 0.16 | 1.18 ± 0.07 |
| E2N-18 km s−1 | 5700 | 310 | 2.15 | 3.16 ± 0.16 | 3.03 ± 0.16 | 3.58 ± 0.19 | 3.41 ± 0.20 | 1.13 ± 0.08 | 1.13 ± 0.09 |
| E2S-17 km s−1 | 5600 | 250 | 2.19 | 3.66 ± 0.15 | 3.85 ± 0.16 | 4.30 ± 0.19 | 4.54 ± 0.21 | 1.18 ± 0.07 | 1.18 ± 0.07 |
| E1-40 km s−1 | 7500 | 460 (c) | 2.05 | 1.24 ± 0.10 | 3.37 ± 0.17 | 1.23 ± 0.11 | 3.58 ± 0.19 | 0.99 ± 0.12 | 1.06 ± 0.08 |
| E1-16 km s−1 | 7500 | 460 (c) | 2.05 | 1.00 ± 0.08 | 3.37 ± 0.17 | 0.98 ± 0.09 | 3.58 ± 0.19 | 0.98 ± 0.12 | 1.06 ± 0.08 |
| Average [C/N]AF: | 1.13 ± 0.09 | 1.20 ± 0.09 | |||||||
Notes. Radial velocity components are listed in the first column. Electron temperature Te, electron density ne, and c(ne,Te) coefficients relating ionized nitrogen integrated intensities to ionized nitrogen column densities are listed in Cols. 2–4, respectively. N+ and C+ column densities N(N+)s, N(N+)i, N(C+)s, and N(C+)i estimated from I([NII])s and I([NII])i integrated intensities in Table 2, in combination with the model prediction in Eq. (2), are listed in Cols. 5–8, respectively. The [C/N] abundance ratios derived from the N+ and C+ column densities, [C/N]s,s and [C/N]i,i are listed in Cols. 9 and 10, where subindexes identify the corresponding N+ and C+ column densities involved in the [C/N] abundance ratio calculation. At the bottom of the table, average abundance ratios for the AF [C/N]AF are listed. (a) Lowest value found in the AF (Lang et al. 2001). (b)Upper limit for molecular clouds far from thermal sources in the CMZ (Rodríguez-Fernández, & Martín-Pintado 2005). (c) Valued adopted from source D in Lang et al. (2001).
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