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Table 2
Best-fit parameters obtained for N2H+ and N15NH+ in the source sample, and the derived nitrogen isotopic ratio.
| Source | Molecule | Ncol | Tex | Vlsr | FWHM | 14N/15N |
|---|---|---|---|---|---|---|
| (1010 cm−2) | (K) | (km s−1) | (km s−1) | |||
| IRAS 03282 | N2H+ | (1.22 ± 0.02) × 103 | 7.22 ± 0.13 | 6.9607 ± 0.0014 | 0.387 ± 0.003 | |
| N15NH+ | 3.6 ± 0.3 | 7.22 (a) | 6.937 ± 0.011 | 0.31 ± 0.03 | 340 ± 30 | |
| L1448 IRS2 | N2H+ | (2.76 ± 0.04) × 103 | 6.00 ± 0.03 | 4.1082 ± 0.0016 | 0.506 ± 0.003 | |
| N15NH+ | 4.8 ± 0.3 | 6.00 (a) | 4.109 ± 0.012 | 0.45 ± 0.03 | 580 ± 40 | |
| L1448 C | N2H+ | (2.54 ± 0.07) × 103 | 6.41 ± 0.09 | 5.073 ± 0.005 | 0.814 ± 0.013 | |
| N15NH+ | 5.9 ± 0.4 | 6.41(a) | 5.05 ± 0.03 | 0.97 ± 0.07 | 430 ± 30 | |
| L1455 A1 | N2H+ | (1.13 ± 0.04) × 103 | 7.2 ± 0.4 | 4.987 ± 0.005 | 0.645 ± 0.011 | |
| N15NH+ | 2.0 ± 0.2 | 7.2(a) | 5.05 ± 0.03 | 0.52 ± 0.07 | 570 ± 60 | |
| Barnard 5 | N2H+ | (1.44 ± 0.03) × 103 | 6.32 ± 0.08 | 10.2696 ± 0.0017 | 0.449 ± 0.004 | |
| N15NH+ | 3.9 ± 0.3 | 6.32(a) | 10.292 ± 0.016 | 0.49 ± 0.04 | 370 ± 30 | |
| L1527 | N2H+ | (7.58 ± 0.18) × 102 | 4.99 ± 0.05 | 5.9056 ± 0.0011 | 0.302 ± 0.003 | |
| N15NH+ | 1.8 ± 0.3 | 4.99(a) | 5.952 ± 0.024 | 0.29 ± 0.06 | 420 ± 70 |
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