Table 1
Density and column densities derived from the models.
| Molecule | n(H2)(cm−3) | N(cm−2) | Notes |
|---|---|---|---|
| CS | 2.0 × 104 | 1.1 × 1014 | a |
| C34S | 0.9 × 104 | 9.9 × 1012 | b |
| C33S | 0.9 × 104 | 2.7 × 1012 | |
| C36S | 1.3 × 104 | 2.8 × 1010 | |
| 13CS | 0.7 × 104 | 2.6 × 1012 | |
| 13C34S | 1.3 × 104 | 1.1 × 1011 | |
| 13C33S | 0.9 × 104 | 3.1 × 1010 | c |
| HCS+ | 0.9 × 104 | 5.5 × 1012 | |
| H13CS+ | 1.0 × 104 | 6.0 × 1010 | |
| HC34S+ | 1.0 × 104 | 2.5 × 1011 | |
| HC33S+ | 1.0 × 104 | 8.0 × 1010 | d |
| CCS | 1.3 × 104 | 3.4 × 1013 | |
| CC34S | 1.3 × 104 | 1.5 × 1012 | |
| CC33S | 1.3 × 104 | 3.5 × 1011 | |
| 13CCS | 1.3 × 104 | 8.4 × 1010 | |
| C13CS | 1.3 × 104 | 5.7 × 1011 | |
| C13C34S | 1.0 × 104 | 1.8 × 1010 | |
| CCCS | 1.3 × 104 | 6.8 × 1012 | |
| CCC34S | 1.3 × 104 | 2.7 × 1011 | |
| CCC33S | 1.3 × 104 | 6.2 × 1010 | |
| 13CCCS | 1.3 × 104 | 2.2 × 1010 | |
| C13CCS | 1.3 × 104 | 7.4 × 1010 | |
| HCCS+ | 1.1 × 1012 | e | |
| HCC34S+ | 4.7 × 1010 | f | |
| H2CS | 1.5 × 104 | 3.7 × 1013 | |
| H2C34S | 1.5 × 104 | 1.5 × 1012 | |
| H2C33S | 1.5 × 104 | 4.2 × 1011 | g |
| H213CS | 1.5 × 104 | 4.5 × 1011 | |
| C4S | 4.0 × 104 | 3.8 × 1010 | h |
| C5S | 5.0 × 104 | 3.0 × 1010 | i |
Notes. The estimated absolute uncertainties for the column densities are 10%. The relative uncertainties for the column densities of the isotopologues of a given species are better than 5%, however, i.e. the relative calibration of the observed lines in the QUIJOTE line survey. (a)Underestimated by the opacity of the J=1–0 and 2–1 transitions of CS. A two-layer model is needed to explain the observed intensities (see Section 4.1). (b)A small opacity effect in the J=2–1 line of C34S may exist (see text). (c)The lines of 13C33S are weak. The column density was derived from the intensities of the two hyperfine components of the J=1–0 transition, which are detected above 5σ (see Fig. 3). (d)Kinetic temperatures estimated from HC34S+ adopting the same value of TK for all hyperfine components of HC33S+ (see Section 4.2). (e)Column density from Cabezas et al. (2022b). (f)The rotational temperatures were assumed to be identical to those of CC34S (see text). (g)Derived adopting a rotational temperature of 8 K and an ortho/para ratio identical to that estimated for the other isotopologues of H2CS (see text). (h)Very uncertain determination of n(H2). A similar column density is obtained assuming an uniform rotational temperature of 8 K (see Appendix A.7). (i)A similar column density is obtained assuming a uniform kinetic temperature of 8.5 K (see Appendix A.8).
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