Table 4. Physical parameters of the considered cloud cores in the astronomical search of ethyl methyl sulfide.
| Source | Coordinates J2000.0 |
HPBW(a)
(″) |
Frequencies(b)
(GHz) |
v
LSR
(c)
(km s−1) |
Δv
FWHM
(d)
(km s−1) |
d
sou
(e)
(″) |
T
rot
(f)
(K) |
N
trans
(g)
×1016 (cm−2) |
N
gauche
(h)
×1016 (cm−2) |
|---|---|---|---|---|---|---|---|---|---|
| Orion KL (Hot core)(i) |
α=5h35m14.5s
δ=−05°22′30.0″ |
30-14 | 80-178 | 5.0 | 7.0 | 10 | 200 | ≤(0.5±0.2) | ≤(1.0±0.3) |
| Orion KL (Compact ridge)(j) |
α=5h35m14.5s
δ=−05°22′30.0″ |
30-14 | 80-178 | 7.0 | 1.5 | 3 | 100 | ≤(1.0±0.3) | ≤(2.0±0.6) |
| Sgr B2(N) |
α=17h47m20.0s
δ=−28°22′19.0″ |
30-21 | 80-115.5 | 63 73 |
8.0 8.0 |
5.0 5.0 |
60 60 |
≤(2.5±0.7) ≤(1.0±0.3) |
≤(5±2) ≤(2.5±0.7) |
| B1-b |
α=03h33m20.0s
=31°07′34.0″ |
30-21 | 82.5-115.5 | 6.7 | 0.7 | 60 | 12 | ≤(0.0005±0.0002) | ≤(0.0010±0.0003) |
| TMC-1 |
α=04h41m41.9s
δ=25°41′27.0″ |
30-21 | 82.5-115.5 | 6.0 | 0.7 | 60 | 10 | ≤(0.0005±0.0002) | ≤(0.0010±0.0003) |
Notes.
(a)
Half power beam width.
(b)
Range of frequencies considered in the analysis.
(c)
Radial velocity with respect to the Local Standard of Rest.
(d)
Full width at half maximum.
(e)
Source diameter assuming a uniform disc-type model.
(f)
Rotational temperature.
(g)
Column density for trans-CH3CH2SCH3 in the ground state.
(h)
Column density for gauche-CH3CH2SCH3 in the ground state.
(i)
Assuming an offset of 3″ with respect to the pointing position.
(j)
Assuming an offset of 7″ with respect to the pointing position.