Table 2.

Physical parameters of the considered cloud cores.

Source	Coordinates J2000.0	HPBW† (″)	Frequencies†† GHz	vLSR (km s−1)	ΔvFWHM (km s−1)	dsou (″)	Trot (K)	N(HSO) ×1014 (cm−2)
Orion KL (IRAM 30m)	$\begin{array}{l}\alpha =5^{\text{h}}{35}^{\text{m}}{14}_{.}^{\text{s}}5\\ \delta =-{05}^{\circ }{22}^{\prime }{30}_{.}^{″}0\end{array}$	30-8	80-307	8	3	5	150	≤(2.0±0.6)
Orion KL (ALMA SV) Hot core	$\begin{array}{l}\alpha ={05}^{\text{h}}{35}^{\text{m}}{14}_{.}^{\text{s}}5\\ \delta =-{05}^{\circ }{22}^{\prime }{32}_{.}^{″}5\end{array}$	~1.9×1.4	213.7-246.7	8	3	3	150	≤(4±1)
Orion KL (ALMA SV) Compact ridge	$\begin{array}{l}\alpha ={05}^{\text{h}}{35}^{\text{m}}{14}_{.}^{\text{s}}1\\ \delta =-{05}^{\circ }{22}^{\prime }{36}_{.}^{″}9\end{array}$	~1.9×1.4	213.7-246.7	7.5	2	3	100	≤(1.0±0.3)
Orion KL (ALMA SV) MM4	$\begin{array}{l}\alpha ={05}^{\text{h}}{35}^{\text{m}}{14}_{.}^{\text{s}}2\\ \delta =-{05}^{\circ }{22}^{\prime }{31}_{.}^{″}1\end{array}$	~1.9×1.4	213.7-246.7	3 5	3 8	3 3	150 150	≤(1.0±0.3) ≤(1.0±0.3)
Sgr B2(N) Cold gas	(IRAM 30m) $\begin{array}{l}\alpha ={17}^{\text{h}}{47}^{\text{m}}{20}_{.}^{\text{s}}0\\ \delta =-{28}^{\circ }{22}^{\prime }{19}_{.}^{″}0\end{array}$	30-21	80-115.5	64 75	9 12	60 60	14 14	≤(1.0±0.3) ≤(1.0±0.3)
	(GBT 100m) $\begin{array}{l}\alpha ={17}^{\text{h}}{47}^{\text{m}}{19}_{.}^{\text{s}}8\\ \delta =-{28}^{\circ }{22}^{\prime }{17}_{.}^{″}0\end{array}$	80-15	7-50
Sgr B2(N) (IRAM 30m) Hot gas	$\begin{array}{l}\alpha ={17}^{\text{h}}{47}^{\text{m}}{20}_{.}^{\text{s}}0\\ \delta =-{28}^{\circ }{22}^{\prime }{19}_{.}^{″}0\end{array}$	30-21	80-115.5	64 73 52	8 8 14	3 3 3	150 150 150	≤(700±200) ≤(100±30) ≤(100±300)
B1-b (IRAM 30m)	$\begin{array}{l}\alpha ={03}^{\text{h}}{33}^{\text{m}}{20}_{.}^{\text{s}}0\\ \delta =-{31}^{\circ }{07}^{\prime }{34}_{.}^{″}0\end{array}$	30-21	80-115.5	6.7	0.7	60	12	≤(0.010±0.003)

^†HPBW (half power beam width) for observations with the IRAM 30m telescope and synthetic beam for the ALMA SV observations.

^††Range of frequencies considered in the analysis. Nevertheless, between 7–50 GHz and 80–115.5 GHz only three lines of HSO (39.532, 81.364, and 81.368 GHz) with large intensities are expected (a-type transitions, S_ij≥1, and E_up between 0 and 200 K).