Open Access
Table 2.
12CN/13CN line ratios, 12CN opacities, and the 12C/13C isotope ratios toward the 13CN peaks and outskirts.
| Source | Offset | I(12CN)/I(13CN) | I(12CN 3/2–1/2)/I(12CN 1/2–1/2) | τ1(12CN 3/2–1/2) | 12C/13C | Note |
|---|---|---|---|---|---|---|
| NGC 253 | (6.3″, 3.9″) | 26.4 ± 1.2 | 1.67 ± 0.03 | 0.79 ± 0.08 | 33.1 ± 3.0 | Peak |
| (2.7″, 1.5″) | 20.0 ± 0.5 | 1.49 ± 0.01 | 1.42 ± 0.06 | 31.1 ± 1.6 | Peak | |
| (–2.4″, –2.1″) | 25.7 ± 1.1 | 1.55 ± 0.01 | 1.21 ± 0.05 | 37.2 ± 2.6 | Peak | |
| (–4.5″, –3.6″) | 27.3 ± 2.2 | 1.53 ± 0.02 | 1.28 ± 0.06 | 40.6 ± 4.6 | Peak | |
| (3.9″, 5.7″) | 30.3 ± 4.0 | 1.50 ± 0.05 | 1.40 ± 0.21 | 46.7 ± 10.6 | Outskirts | |
| (–1.5″, –5.1″) | 52.7 ± 4.4 | 1.66 ± 0.02 | 0.82 ± 0.07 | 66.9 ± 8.8 | Outskirts | |
| NGC 1068 | (0.3″, 0.3″) | 32.9 ± 2.7 | 1.77 ± 0.02 | 0.52 ± 0.05 | 37.3 ± 4.3 | Peak |
| (0.3″, –1.8″) | 47.2 ± 8.0 | 1.63 ± 0.03 | 0.93 ± 0.11 | 62.2 ± 16.4 | Outskirts | |
| (–0.6″, 1.2″) | 35.3 ± 3.3 | 1.60 ± 0.09 | 1.03 ± 0.33 | 48.2 ± 13.2 | Outskirts | |
| (3.3″, 1.8″) | 20.0 ± 2.3 | 1.72 ± 0.05 | 0.66 ± 0.14 | 24.0 ± 4.9 | Outskirts | |
| (–3.6″, –0.3″) | 21.0 ± 3.0 | 1.67 ± 0.06 | 0.80 ± 0.18 | 26.5 ± 7.1 | Outskirts | |
| NGC 4945 | (0.0″, 0.9″) | 7.9 ± 0.3 | 1.78 ± 0.10 | 0.50 ± 0.27 | 9.0 ± 1.7 | Peak |
| (–3.0″, –4.5″) | 26.6 ± 3.6 | 1.39 ± 0.11 | 1.86 ± 0.65 | 43.6 ± 20.8 | Outskirts | |
| (–4.8″, –0.3″) | 18.9 ± 2.2 | 1.39 ± 0.11 | 1.88 ± 0.69 | 34.0 ± 15.1 | Outskirts |
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