Table 2
Observed and physical properties of source A.
| Line | vLSR | Δv | ∫ Tmbdv | Nmol |
|---|---|---|---|---|
| (km s−1) | (km s−1) | (K km s−1) | (cm−2) | |
| (1) | (2) | (3) | (4) | |
| C18O (1–0) | 8.11 ± 0.01 | 0.53 ± 0.01 | 1.14 ± 0.06 | (5.9 ± 0.3) × 1014 |
| N2H+ (1–0) | 8.06 ± 0.12 | 0.45 ± 0.12 | 1.29 ± 0.09 | (3.1 ± 0.2) × 1012 |
| HCO+ (1–0) | ... | ... | <0.32 | ... |
| H13CO+ (1–0) | 8.20 ± 0.21 | 0.70 ± 0.20 | 0.42 ± 0.01 | (2.5 ± 0.1) × 1011 |
| HCN (1–0) | ... | ... | 0.31 ± 0.02 | >1.1 × 1012 |
| H13CN (1–0) | 8.04 ± 0.21 | 0.50 ± 0.21 | 0.11 ± 0.01 | (4.0 ± 0.4) × 1011 |
| HNC (1–0) | ... | ... | 1.33 ± 0.05 | >2.4 × 1012 |
| HN13C (1–0) | 8.09 ± 0.21 | 0.77 ± 0.21 | 0.47 ± 0.01 | (1.1 ± 0.2) × 1012 |
| CS (2–1) | ... | ... | 0.57 ± 0.04 | >2.6 × 1012 |
| 13CS (2–1) | 8.18 ± 0.20 | 0.69 ± 0.20 | 0.05 ± 0.01 | (2.5 ± 0.5) × 1011 |
| CCS (JN = 87–76) | 8.47 ± 0.19 | 0.52 ± 0.19 | 0.13 ± 0.02 | (2.0 ± 0.3) × 1012 |
| CH3OH (JK = 20–10 A+) | 8.28 ± 0.19 | 0.57 ± 0.19 | 0.26 ± 0.03 | (1.5 ± 0.2) × 1013 |
| CH3OH (JK = 2−1–1−1 E) | 8.23 ± 0.19 | 0.54 ± 0.19 | 0.15 ± 0.03 | (8.8 ± 0.2) × 1012 |
Notes. (1) LSR velocity. (2) FWHM linewidth. (3) Integrated intensity. For N2 H+ (1–0), the integrated velocity range is 5–11 km s−1. For HCO+ (1–0), HCN(1–0), HNC (1–0), and CS (2–1), the integrated velocity range is 7–9 km s−1. 3σ is taken as the upper limit of the HCO+ (1–0) integrated intensity. (4) Beam-averaged molecular column density calculated by assuming optically thin emission and excitation temperature of 10 K. Since HCN (1–0), HNC (1–0), and CS (2–1) suffer from self-absorption, their derived column densities can only be used as lower limits.
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