Table B.6
Line parameters for the HCO+, H13CO+ and N2H+ transitions observed towards NGC 1333–IRAS2.
| Frequency (MHz) | Eup (K) | Sμ2 (D2) | v (km s-1) | Δv1 / 2 (km s-1) | TMB (K) |  dV (K km s-1) |
Comments |
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
|
|
|||||||
| HCO+ | |||||||
|
|
|||||||
| 535 061.581 | 89.9 | 90.7 | 7.52(0.04) | 1.2(0.2) | 1.03(0.09) | 1.4(0.6) | D |
| 713 341.228 | 154.1 | 120.9 | 7.6(0.2) | 1.7(0.5) | 0.8(0.5) | 1.5(0.3) | D |
| 980 636.494 | 282.4 | 166.2 | 7.3(0.3) | 1.9(0.8) | 0.4(0.3) | 0.8(0.3) | D |
| 1 069 693.891 | 333.8 | 181.3 | – | – | – | – | NO |
|
|
|||||||
| H13CO+ | |||||||
|
|
|||||||
| 520 459.884 | 87.4 | 90.7 | 7.5(0.2) | 0.7(0.4) | 0.1(0.1) | 0.09(0.06) | W |
| 607 174.646 | 116.6 | 105.8 | – | – | ≤0.1 | ≤0.1 | ND |
| 780 562.812 | 187.3 | 136.1 | – | – | ≤0.1 | ≤0.1 | ND |
|
|
|||||||
| N2H+ | |||||||
|
|
|||||||
| 558 966.503 | 93.9 | 669.5 | 7.6(0.2) | 1.3(0.4) | 0.3(0.2) | 0.36(0.09) | D |
| 745 209.868 | 161.0 | 891.6 | – | – | ≤0.3 | ≤0.6 | ND |
| 1 024 443.025 | 295.1 | 1223.1 | – | – | ≤0.3 | ≤0.6 | ND |
Notes. (1)–(3) Spectroscopic line parameters (see references listed in Table 2) of the observed transitions. (4)–(7) Observed line parameters: velocity, linewidth, peak temperature and integrated intensities. The 3σ uncertainties that result from Gaussian fits performed with the CLASS software are given in brackets. (8) D: detected above the 3σ level and dV ≥ 5σ, W: weak line (dV ≥ 5σ), ND: not-detected lines (TMB< 3σ and dV< 5σ), NO: not observed.
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