Table 1.
Line parameters of the detected transitions of HSO.
| Transition | νobs(a) | νobs − νcalc(b) | Δv |  |
 |
Notes |
|---|---|---|---|---|---|---|
| (MHz) | (MHz) | (km s−1) | (mK) | (mK km s−1) | ||
| B1-b | ||||||
| N = 10, 1 − 00, 0J = 3/2 − 1/2 F = 1 − 0 | 39 517.602 ± 0.010 | +0.008 | 0.95 ± 0.15 | 2.25 ± 0.47 | 2.28 ± 0.35 | |
| N = 10, 1 − 00, 0J = 3/2 − 1/2 F = 2 − 1 | 39 532.198 ± 0.003 | −0.024 | 1.22 ± 0.06 | 5.95 ± 0.37 | 7.73 ± 0.31 | |
| N = 10, 1 − 00, 0J = 3/2 − 1/2 F = 1 − 1 | 39 553.383 ± 0.016 | −0.054 | 1.38 ± 0.24 | 1.56 ± 0.46 | 2.30 ± 0.39 | |
| N = 10, 1 − 00, 0J = 1/2 − 1/2 F = 1 − 0 | 39 826.737 ± 0.022 | +0.070 | 0.97 ± 0.32 | 1.19 ± 0.38 | 1.24 ± 0.33 | |
| N = 10, 1 − 00, 0J = 1/2 − 1/2 F = 0 − 1 | 39 857.384 ± 0.013 | −0.028 | 1.14 ± 0.19 | 1.46 ± 0.36 | 1.77 ± 0.29 | |
| N = 10, 1 − 00, 0J = 1/2 − 1/2 F = 1 − 1 | 39 862.473 ± 0.015 | −0.037 | 1.60 ± 0.24 | 1.71 ± 0.40 | 2.90 ± 0.38 | |
| N = 20, 2 − 10, 1J = 5/2 − 3/2 F = 2 − 1 | 79 162.483 ± 0.004 | (A) | ||||
| N = 20, 2 − 10, 1J = 5/2 − 3/2 F = 3 − 2 | 79 164.952 ± 0.016 | +0.025 | 0.76 ± 0.22 | 9.90 ± 2.44 | 8.06 ± 1.58 | |
| N = 20, 2 − 10, 1J = 5/2 − 3/2 F = 2 − 2 | 79 183.698 (c) | ≤3.07 | (B) | |||
| N = 20, 2 − 10, 1J = 3/2 − 1/2 F = 1 − 1 | 79 368.415 (c) | ≤3.20 | (B) | |||
| N = 20, 2 − 10, 1J = 3/2 − 1/2 F = 1 − 0 | 79 373.513 (c) | ≤3.22 | (B) | |||
| N = 20, 2 − 10, 1J = 3/2 − 1/2 F = 2 − 1 | 79 378.760 ± 0.013 | +0.064 | 0.33 ± 0.11 | 7.31 ± 2.22 | 2.54 ± 0.76 | |
| N = 20, 2 − 10, 1J = 3/2 − 3/2 F = 1 − 1 | 79 677.488 (c) | ≤3.06 | (B) | |||
| N = 20, 2 − 10, 1J = 3/2 − 3/2 F = 2 − 2 | 79 708.983 (c) | ≤ 2.66 | (B) | |||
| TMC-1 CP | ||||||
| N = 10, 1 − 00, 0J = 3/2 − 1/2 F = 1 − 0 | 39 517.601 ± 0.015 | +0.007 | 1.30 ± 0.23 | 0.57 ± 0.13 | 0.78 ± 0.13 | |
| N = 10, 1 − 00, 0J = 3/2 − 1/2 F = 2 − 1 | 39 532.209 ± 0.010 | −0.013 | 1.19 ± 0.10 | 1.26 ± 0.13 | 1.60 ± 0.11 | |
| N = 10, 1 − 00, 0J = 3/2 − 1/2 F = 1 − 1 | 39 553.438 ± 0.010 | +0.001 | 0.38 ± 0.15 | 0.34 ± 0.12 | 0.14 ± 0.04 | |
| N = 10, 1 − 00, 0J = 1/2 − 1/2 F = 1 − 0 | 39 826.664 ± 0.010 | −0.003 | 0.45 ± 0.21 | 0.38 ± 0.10 | 0.18 ± 0.06 | |
| N = 10, 1 − 00, 0J = 1/2 − 1/2 F = 0 − 1 | 39 857.413 ± 0.020 | +0.001 | 0.88 ± 0.33 | 0.27 ± 0.12 | 0.25 ± 0.09 | |
| N = 10, 1 − 00, 0J = 1/2 − 1/2 F = 1 − 1 | 39 862.501 ± 0.017 | −0.009 | 1.06 ± 0.34 | 0.51 ± 0.12 | 0.57 ± 0.16 | |
| N = 20, 2 − 10, 1J = 5/2 − 3/2 F = 3 − 2 | 79 164.927 (c) | ≤2.00 | (B) | |||
| N = 20, 2 − 10, 1J = 3/2 − 1/2 F = 2 − 1 | 79 378.696 (c) | ≤1.90 | (B) | |||
| L183 | ||||||
| N = 10, 1 − 00, 0J = 3/2 − 1/2 F = 1 − 0 | 39 517.554 ± 0.015 | −0.040 | 0.61 ± 0.21 | 1.50 ± 0.50 | 0.97 ± 0.34 | |
| N = 10, 1 − 00, 0J = 3/2 − 1/2 F = 2 − 1 | 39 532.214 ± 0.012 | −0.008 | 0.62 ± 0.45 | 2.42 ± 0.74 | 1.60 ± 0.68 | |
| N = 10, 1 − 00, 0J = 3/2 − 1/2 F = 1 − 1 | 39 553.437 (c) | ≤0.63 | (B) | |||
| N = 10, 1 − 00, 0J = 1/2 − 1/2 F = 1 − 0 | 39 826.667 (c) | ≤0.80 | (B) | |||
| N = 10, 1 − 00, 0J = 1/2 − 1/2 F = 0 − 1 | 39 857.412 (c) | ≤0.66 | (B) | |||
| N = 10, 1 − 00, 0J = 1/2 − 1/2 F = 1 − 1 | 39 862.522 ± 0.014 | +0.012 | 0.99 ± 0.17 | 2.26 ± 0.64 | 2.38 ± 0.46 | |
| L483 | ||||||
| N = 10, 1 − 00, 0J = 3/2 − 1/2 F = 2 − 1 | 39 532.174 ± 0.006 | −0.048 | 0.86 ± 0.10 | 2.47 ± 0.40 | 2.27 ± 0.24 | |
| N = 20, 2 − 10, 1J = 5/2 − 3/2 F = 3 − 2 | 79 164.927 (c) | ≤3.58 | (B) | |||
| L1495B | ||||||
| N = 10, 1 − 00, 0J = 3/2 − 1/2 F = 2 − 1 | 39 532.184 ± 0.010 | −0.038 | 0.95 ± 0.14 | 2.97 ± 0.64 | 2.99 ± 0.45 | |
| L1527 | ||||||
| N = 10, 1 − 00, 0J = 3/2 − 1/2 F = 2 − 1 | 39 532.130 ± 0.012 | −0.092 | 1.26 ± 0.22 | 2.91 ± 0.50 | 3.90 ± 0.52 | |
| Lupus-1A | ||||||
| N = 10, 1 − 00, 0J = 3/2 − 1/2 F = 2 − 1 | 39 532.195 ± 0.007 | −0.027 | 0.66 ± 0.13 | 4.43 ± 0.69 | 3.12 ± 0.48 | |
Notes. All observational parameters and their associated uncertainties are obtained from a Gaussian fit to each line profile.
Observed frequencies adopting a vLSR of 6.70 and 5.83 km s−1 for B1-b and TMC-1 CP, respectively (see text). For the other dense cores, we used the following values: 2.4 km s−1 for L183 (Marcelino et al. 2009; Lattanzi et al. 2020), 5.3 km s−1 for L483 (Agúndez et al. 2019), 7.67 km s−1 for L1495B (Hirota et al. 2004), 5.9 km s−1 for L1527 (Yoshida et al. 2019), and 5.0 km s−1 for Lupus-1A (Sakai et al. 2010b).
Observed minus calculated frequency, where calculated frequencies are those obtained in this work (see text and Table A.1).
(A) Blended with negative frequency-switching artifact.
(B) Non-detection 3σ limits are shown. The σ value is computed as 
, where the rms is measured in the spectra, c is the speed of light, δν is the spectral resolution (0.03815 MHz and 0.04883 MHz for the Yebes 40 m and the IRAM 30 m observations, respectively), and Δv is the full width at half maximun for which we used the average of the observed values.
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