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Table 1
Spectroscopic parameters of the observed lines towards R CrA IRS 7B, including Gaussian-integrated areas and LTE-MCMC derived results for HCN and HNC and their 13C and 15N isotopologues.
| Species | Frequency (MHz) | Eup(K) | Aij(10−4 s−1) | ∫Tmbdv (K km s−1) | Texc (K) | Ncol (cm−2) | τ |
|---|---|---|---|---|---|---|---|
| HCN (3–2) | 265886.434 | 25.52 | 8.36 | 29.4 (2) | 26 (5) | 3.9(3) × 1013 | 0.60 |
| HNC (3–2) | 271981.142 | 26.11 | 9.34 | 12.0 (1) | 27 (5) | 1.17(9) × 1013 | 0.30 |
| H13CN (3–2) | 259011.798 | 24.86 | 7.73 | 1.85 (3) | 11 (3) | 4.0(2) × 1012 | 0.20 |
| HN13C (3–2) | 261263.513 | 25.08 | 8.28 | 0.80 (3) | 12 (2) | 1.5(3) × 1012 | 0.10 |
| HC15N (3–2) | 258156.996 | 24.78 | 7.65 | 0.45 (2) | 11 (4) | 1.0(6) × 1012 | 0.06 |
| H15NC (3–2) | 266587.800 | 25.59 | 6.89 | 0.21 (3) | 14 (2) | 3.9(8) × 1011 | 0.03 |
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