Table 1.
Observational and physical parameters of the transitions of CS and its isotopologues.
| Line | Frequency | θbeam | vLSR | Tp | Δv | ∫Tmbdv | N |
|---|---|---|---|---|---|---|---|
| (GHz) | (″) | (km s−1) | (mK) | (km s−1) | (mK km s−1) | (cm−2) | |
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
| CS J = 4 − 3 | 195.9542109(16) | 30 | 234.5±0.1 | 448.8±13.5 | 4.71±0.02 | 2251±8 | (1.4±0.1)×1013 |
| C34S J = 4 − 3 | 192.8184566(12) | 31 | 234.3±0.1 | 33.4±3.6 | 4.68±0.34 | 167±10 | (1.1±0.1)×1012 |
| C33S J = 4 − 3 | 194.3365623(3) | 30 | 234.3±0.2 | 15.5±1.9 | 3.83±0.68 | 85±11 | (5.3±0.8)×1011 |
| CS J = 5 − 4 | 244.9355565(28) | 24 | 234.5±0.1 | 410.1±17.9 | 4.84±0.04 | 2113±13 | (1.8±0.3)×1013 |
| C34S J = 5 − 4 | 241.0160892(7) | 25 | 234.4±0.1 | 27.8±1.2 | 4.22±0.21 | 125±6 | (1.1±0.2)×1012 |
| C33S J = 5 − 4 | 242.9136103(3) | 24 | 234.5±0.3 | 8.9±1.4 | 3.52±0.66 | 36±11 | (3.0±1.1)×1011 |
| C36S J = 5 − 4 | 237.5258421(9) | 25 | ... | < 5.3 | ... | < 26 | < 2.2×1011 |
| 13CS J = 5 − 4 (a) | 231.2206852(35) | 26 | 234.8±1.0 | 9.0±2.6 | 5.71±2.97 | 55±21 | (4.7±2.0)×1011 |
| 13C34S J = 5 − 4 | 227.3005058(35) | 26 | ... | < 13.6 | ... | < 69 | < 5.7×1011 |
Notes. (1) Transition. (2) Rest frequency taken from the Cologne Database for Molecular Spectroscopy (CDMS, Endres et al. 2016). Uncertainties in the last digits are given in parentheses. (3) Half-power beam width. (4) Velocity centroid. (5) Peak main beam brightness temperature. (6) Full width at half maximum (FWHM) line width. (7) Integrated intensity. The integrated intensities are obtained through Gaussian fitting, with the exception of two C33S lines, which are estimated by integrating across the velocity range of 225–245 km s−1. For C36S and 13C34S (5–4), the 3σ upper limits of integrated intensities are also integrated over the velocity range of 225–245 km s−1. (8) Total molecular column density derived assuming Local Thermodynamic Equilibrium (LTE) conditions, optically thin emission, and an excitation temperature of 13.1 ± 1.2 K. “...” indicates that no information is available.
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