Table 1
Total column densities, H13CN/HC15N and HN13C/H15NC ratios, 14N/15N ratios, and galactocentric distances (RGC).
| Source | N (HN13C) (×1011 cm−2) | N (H15NC) (×1011 cm−2) | N(H13CN) (×1011 cm−2) | N(HC15N) (×1011 cm−2) | H13CN/HC15N(a) (HN13C/H15NC) | HCN/HC15N(a) (HNC/H15NC) | RGC (kpc) |
|---|---|---|---|---|---|---|---|
| WB89-315 | ≤1.3 | ≤1.1 | ≤1.0 | ≤1.0 | _ | _ | 16.3 |
| WB89-379 | 1.0 ± 0.2 | ≤0.5 | 6.2 ± 0.3 | 1.5 ± 0.2 | 4.1 ± 0.6 (≥2.1) | 452 ± 77 (≥232) | 16.4 |
| WB89-380 | 1.6 ± 0.3(b) | ≤0.9 | 8.2 ± 0.5 | 2.0 ± 0.3 | 4.1 ± 0.7 (≥1.7) | 447 ± 90 (≥189) | 16.0 |
| WB89-391 | ≤0.3 | ≤0.3 | 5.0 ± 0.2 | 1.0 ± 0.1 | 5.0 ± 0.6 | 546 ± 78 | 16.1 |
| WB89-399 | ≤1.1 | ≤1.3 | ≤1.2 | ≤1.2 | _ | _ | 16.0 |
| WB89-437 | 2.2 ± 0.4 | ≤1.0 | 15.5 ± 0.6 | 4.5 ± 0.4 | 3.5 ± 0.3 (≥2.1) | 370 ± 48 (≥226) | 15.7 |
| WB89-440 | ≤0.6 | ≤0.8 | ≤0.7 | ≤0.7 | _ | _ | 15.7 |
| WB89-501 | ≤0.5 | ≤0.5 | 2.3 ± 0.3 | 1.1 ± 0.4(b) | 2.1 ± 0.9 | 228 ± 101 | 15.6 |
| WB89-529 | ≤1.2 | ≤1.6 | ≤1.3 | ≤1.4 | _ | _ | 17.8 |
| WB89-572 | ≤0.5 | ≤0.6 | 1.7 ± 0.5(b) | 1.0 ± 0.2(b) | 1.6 ± 0.6 | 196 ± 73 | 18.3 |
| WB89-621 | 1.4 ± 0.2 | ≤0.5 | 18.1 ± 0.5 | 3.2 ± 0.3 | 5.6 ± 0.6 (≥2.9) | 703 ± 86 (≥365) | 18.9 |
| WB89-640 | ≤0.8 | ≤0.8 | 2.3 ± 0.5(b) | ≤0.8 | ≥2.8 | ≥312 | 16.8 |
| WB89-670 | 1.0 ± 0.2(b) | ≤0.7 | ≤0.6 | ≤0.6 | _(≥1.4) | _ (>214) | 23.4 |
| WB89-705 | 2.9 ± 0.3 | ≤0.8 | ≤0.6 | ≤0.6 | _ (≥3.77) | _(≥510) | 20.5 |
| WB89-789 | 2.7 ± 0.3 | ≤0.8 | 3.4 ± 0.5(b) | 3.4 ± 0.5 | 1.0 ± 0.2 (≥3.52) | 127 ± 30 (>445) | 19.1 |
| WB89-793 | 1.9 ± 0.7(b) | ≤1.6 | ≤1.5 | ≤0.9 | _(≥1.2) | _ (>137) | 16.9 |
| WB89-898 | ≤1.0 | ≤1.2 | 1.5 ± 0.8(b) | ≤0.9 | ≥1.6 | >173 | 15.8 |
| 19423+2541 | 1.3 ± 0.2 | 1.3 ± 0.4(b) | 14.5 ± 0.5 | 2.7 ± 0.5 | 5.3 ± 0.9 (1.0 ± 0.4) | 492 ± 99 (96 ± 34) | 13.5 |
| 19383+2711 | 1.0 ± 0.2 | ≤0.5 | 7.6 ± 0.6 | 2.9 ± 0.4 | 2.6 ± 0.4 (≥1.9) | 228 ± 45 (>173) | 12.7 |
| 19383+2711-b(c) | ≤0.5 | ≤0.5 | 5.2 ± 0.6 | ≤1.3 | ≥4.1 | >373 | 13.2 |
| 19489+3030 | 1.9 ± 0.2 | ≤0.7 | 3.5 ± 0.5 | ≤0.7 | ≥5.0 (≥2.8) | >446 (>254) | 12.9 |
| 19571+3113 | 1.3 ± 0.3(b) | ≤0.9 | 4.0 ± 0.5 | 1.1 ± 0.2 | 3.6 ± 0.9 (≥1.5) | 311 ± 85 (>127) | 12.2 |
| 20243+3853 | 1.3 ± 0.3(b) | ≤0.7 | 6.0 ± 0.6 | 1.1 ± 0.2 | 5.5 ± 1.2 (≥1.8) | 494 ± 119 (>159) | 12.8 |
| WB89-002 | ≤1.2 | ≤1.6 | ≤1.3 | ≤1.3 | _ | _ | 8.7 |
| WB89-006 | 2.7 ± 0.5 | 2.7 ± 0.6 | 2.7 ± 0.7(b) | ≤1.1 | ≥2.5(1.0 ± 0.3) | >246 (96 ± 28) | 14.3 |
| WB89-014 | ≤0.9 | ≤1.1 | ≤0.9 | ≤1.0 | _ | _ | 14.9 |
| WB89-031 | ≤0.7 | ≤0.8 | ≤0.7 | ≤0.7 | _ | _ | 14.1 |
| WB89-035 | ≤0.6 | ≤7.8 | 3.3 ± 0.5 | ≤0.6 | ≥5.4 | >492 | 13.1 |
| WB89-040 | 0.60 ± 0.16(b) | ≤0.5 | 2.6 ± 0.4 | ≤0.5 | ≥5.4 (≥1.1) | >454(>97) | 11.9 |
| WB89-060 | 2.0 ± 0.3 | ≤0.8 | 18.8 ± 0.7 | 3.0 ± 0.3 | 6.3 ± 0.7 (≥2.4) | 595 ± 87 (>230) | 13.6 |
| WB89-076 | 3.31 ± 0.18 | 1.2 ± 0.4(b) | 3.3 ± 0.4 | 1.07 ± 0.19 | 3.1 ± 0.6 (2.7 ± 0.8) | 318 ± 71 (275 ± 87) | 15.1 |
| WB89-080 | ≤1.2 | ≤1.5 | ≤1.3 | ≤1.2 | _ | _ | 12.8 |
| WB89-083 | 0.70 ± 0.08 | ≤0.4 | ≤0.4 | ≤0.4 | _(≥1.8) | _(>182) | 14.7 |
| WB89-152 | ≤1.0 | ≤1.1 | ≤1.1 | ≤1.1 | _ | _ | 14.4 |
| WB89-283 | ≤0.3 | ≤0.4 | 1.1 ± 0.3(b) | ≤0.4 | ≥2.6 | >278 | 15.8 |
| WB89-288 | ≤0.6 | ≤0.4 | ≤0.4 | 0.6 ± 0.2(b) | ≤0.6 | ≤71 | 16.8 |
Notes. Column densities have been derived assuming a Tex of 25 K (see Sect. 3.2). Column density errors do not take the calibration error (~10%) into account. The calibration error for the 14N/15N ratio largely cancels out as the corresponding pairs of lines are recorded with the same spectral setup. (a)Ratios derived from HNC are also indicated in parentheses, when derived. (b)Tentative detection.(c)Second velocity component at vLSR = −71.2 km s−1, derived from the H13CN(1–0) line peak (see Table A.3).
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