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This article has an erratum: [https://doi.org/10.1051/0004-6361/201935428e]

Table 4

Parameters of our best-fit LTE model (or upper limit) of selected (complex) organic molecules toward Sgr B2(N2).

Molecule Statusa N det b Sizec T rot d N e C f ΔV g V off h i 30 mj
(′′) (K) (cm-2) (km s-1) (km s-1)
CH3CN, ν8 = 1⋆ d 20 1.40 170 2.2 (18) 1.00 5.4 -0.5 1 y
ν8 = 2 d 8 1.40 170 7.5 (18) 1.00 6.5 –0.5 0.29 y
ν4 = 1 t 1 1.40 170 2.0 (19) 1.00 6.5 –0.5 0.11 y
13CH3CN, ν= 0 d 8 1.40 170 1.1 (17) 1.18 5.4 –0.5 21 y
ν8 = 1 d 3 1.40 170 1.1 (17) 1.18 5.4 –0.5 21 y
CH313CN, ν= 0 d 7 1.40 170 1.1 (17) 1.18 5.4 –0.5 21 y
ν8 = 1 d 9 1.40 170 1.1 (17) 1.18 5.4 –0.5 21 y
13CH313CN d 1 1.40 170 4.7 (15) 1.18 5.4 –0.5 466 n
CH3C15N t 0 1.40 170 8.3 (15) 1.18 5.4 –0.5 266 n
CH2DCN d 6 1.40 170 8.3 (15) 1.18 5.4 –0.6 266 n
C2H5CN⋆ d 154 1.20 150 6.2 (18) 1.38 5.0 –0.8 1 y
13CH3CH2CN d 54 1.20 150 1.9 (17) 1.38 5.0 –0.8 32 y
CH313CH2CN d 38 1.20 150 1.9 (17) 1.38 5.0 –0.8 32 y
CH3CH213CN d 37 1.20 150 1.9 (17) 1.38 5.0 –0.8 32 y
C2H5C15N d 9 1.20 150 1.2 (16) 1.38 5.0 –0.8 500 n
CH2DCH2CN (out of plane) t 2 1.20 150 3.0 (15) 1.38 5.0 –0.8 2045 n
CH2DCH2CN (in plane) n 0 1.20 150 <1.5 (15) 1.38 5.0 –0.8 >4091 n
CH3CHDCN t 1 1.20 150 3.0 (15) 1.38 5.0 –0.8 2045 n
C2H3CN, ν= 0⋆ d 44 1.10 200 4.2 (17) 1.00 6.0 –0.6 1 y
ν11 = 1 d 30 1.10 200 4.2 (17) 1.00 6.0 –0.5 1 y
ν15 = 1 d 20 1.10 200 4.2 (17) 1.00 6.0 –0.5 1 y
ν11 = 2 d 6 1.10 200 4.2 (17) 1.00 6.0 –0.5 1 y
13CH2CHCN d 10 1.10 200 2.1 (16) 1.38 6.0 –0.6 20 y
CH213CHCN d 9 1.10 200 2.1 (16) 1.38 6.0 –0.6 20 y
CH2CH13CN d 8 1.10 200 2.1 (16) 1.38 6.0 –0.6 20 y
C2H3C15N n 0 1.10 200 <3.4 (15) 1.38 6.0 –0.6 >122 n
cis-CHDCHCN n 0 1.10 200 <3.4 (15) 1.38 6.0 –0.6 >122 n
trans-CHDCHCN n 0 1.10 200 <3.4 (15) 1.38 6.0 –0.6 >122 n
CH2CDCN n 0 1.10 200 <2.1 (15) 1.38 6.0 –0.6 >203 n
HC3N, ν7 = 1⋆ d 6 1.30 170 3.5 (17) 1.44 5.0 –0.7 1 y
H13CCCN, ν= 0 d 2 1.30 170 1.7 (16) 1.44 5.0 –0.7 20 y
ν7 = 1 d 4 1.30 170 1.7 (16) 1.44 5.0 –1.0 20 y
HC13CCN, ν= 0 d 3 1.30 170 1.7 (16) 1.44 5.0 –0.7 20 y
ν7 = 1 d 3 1.30 170 1.7 (16) 1.44 5.0 –1.0 20 y
HCC13CN, ν= 0 d 3 1.30 170 1.7 (16) 1.44 5.0 –0.7 20 y
ν7 = 1 d 3 1.30 170 1.7 (16) 1.44 5.0 –1.0 20 y
H13C13CCN t 1 1.30 170 7.2 (14) 1.44 5.0 –0.7 480 n
H13CC13CN t 0 1.30 170 7.2 (14) 1.44 5.0 –0.7 480 y
HC13C13CN t 1 1.30 170 7.2 (14) 1.44 5.0 –0.7 480 n
HC315N t 0 1.30 170 1.2 (15) 1.44 5.0 –0.7 300 y
DC3N t 0 1.30 170 3.0 (14) 1.51 5.0 –0.5 1144 n
CH3OH, νt = 1⋆ d 16 1.40 160 4.0 (19) 1.00 5.4 –0.2 1 y
CH2DOH t 2 1.40 160 4.8 (16) 1.15 5.4 –0.5 828 n
CH3OD n 0 1.40 160 <2.6 (16) 1.05 5.4 –0.5 >1524 n
C2H5OH⋆ d 168 1.25 150 2.0 (18) 1.24 5.4 0.0 1 y
CH3CH2OD n 0 1.25 150 <3.0 (16) 2.96 5.4 0.0 >67 n
CH3CHDOH n 0 1.25 150 <3.0 (16) 2.96 5.4 0.0 >67 n
CH2DCH2OH (out of plane) n 0 1.25 150 <3.0 (16) 2.96 5.4 0.0 >67 n
CH2DCH2OH (in plane) n 0 1.25 150 <2.1 (16) 2.96 5.4 0.0 >96 n
CH3OCHO, νt = 0⋆ d 90 1.50 150 1.2 (18) 1.23 4.7 –0.4 1 y
νt = 1 d 35 1.50 150 1.2 (18) 1.23 4.7 –0.4 1 y
CH2DOCHO (out of plane) n 0 1.50 150 <2.5 (16) 1.07 4.7 –0.4 >50 n
CH2DOCHO (in plane) n 0 1.50 150 <7.3 (15) 0.52 4.7 –0.4 >167 n

Notes.

(a)

d: detection, t: tentative detection, n: nondetection.

(b)

Number of detected lines (conservative estimate, see Sect. 3). One line of a given species may mean a group of transitions of that species that are blended together.

(c)

Source diameter (FWHM).

(d)

Rotational temperature.

(e)

Total column density of the molecule. X (Y) means X × 10Y.

(f)

Correction factor that was applied to the column density to account for the contribution of vibrationally or torsionally excited states or other conformers (e.g., gauche for ethanol), in the cases where this contribution was not included in the partition function of the spectroscopic predictions. For deuterated methyl formate, it is the scaling factor used to compute the column density of each conformer as if it were an independent species.

(g)

Linewidth (FWHM).

(h)

Velocity offset with respect to the assumed systemic velocity of Sgr B2(N2), Vlsr = 74 km s-1.

(i)

Column density ratio, with Nref the column density of the previous reference species marked with a ⋆.

(j)

Detected (y) or not detected (n) toward Sgr B2(N) (N1 and/or N2) with the IRAM 30 m telescope (Belloche et al. 2013).

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