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Table 3.

Physical parameters of the considered cloud cores.

Source Orion KL Sgr B2(N) B1
Coordinates α = 05h35m14.1s α = 17h47m20.0s α = 03h33m20.0s
(J2000.0) δ = −05°22′32.5″ δ = −28°22′19.0″ δ = 31°07′34.0″
HPBWa (″) ~1.9 × 1.4 30–21 29–21
Frequenciesb (GHz) 213.7–246.7 80–115.5 83–115.5
υLSR (km s−1) 7.5 64.0 6.7
ΔυFWHM (km s−1) 2.0 5.0 0.7
dsou (″) 3.0 3.0 60
Trot (K) 100 100 12
N(CH3OCH2CHO) ×1014 (cm−2) ≤(5 ± 2) ≤(50 ± 25) ≤(0.02 ± 0.01)
N(CH3CH2OCOH)c/N(CH3OCH2CHO) ≥4 ≥11

Notes.

(a)

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

(b)

Range of frequencies considered in the analysis.

(c)

Column densities for CH3CH2OCOH are taken from Tercero et al. (2015) and Belloche et al. (2013).

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