Table 2
A list of best-fit column densities and number densities derived from the LVG analysis.
| Species | Column densities (cm-2) | Hydrogen densities (cm-3) |
|
|
||
| CS | (1.07 ± 0.13) × 1015 | (7.26 ± 1.18) × 105 |
| CN | (5.48 ± 3.75) × 1015 | – |
| H2CO | (5.01 ± 2.76) × 1013 | – |
| SO | (4.46 ± 0.61) × 1014 | (1.10 ± 0.21) × 106 |
| N2H+ | (1.47 ± 0.58) × 1013 | – |
| H3O+ | (9.44 ± 0.38) × 1014 | (7.18 ± 3.32) × 104 |
| SiO | (7.95 ± 0.49) × 1013 | (5.04 ± 0.32) × 105 |
| HCN | (3.38 ± 0.40) × 1015 | (8.70 ± 1.76) × 105 |
| HCO+ | (5.26 ± 1.28) × 1014 | (2.34 ± 0.84) × 105 |
| HNC | (1.90 ± 0.29) × 1014 | (5.46 ± 0.88) × 105 |
| HC3N | (2.87 ± 0.58) × 1013 | – |
| NO | (3.02 ± 0.61) × 1015 | – |
| CO | (2.23 ± 0.35) × 1018 | (2.28 ± 0.52) × 104 |
| H13CN | (9.70 ± 2.30) × 1013 | (4.44 ± 2.00) × 105 |
| H13CO+ | (4.02 ± 2.55) × 1013 | – |
|
|
||
Notes. Densities for some species are not shown because of the larger uncertainty considered as a consequence of the partial source coverage by the beam (see Sect. 3). Because CO and HCN are likely to be optically thick, 13C isotopologues are also used in the LVG analysis assuming the 12C/13C ratio of 25.
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