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Home All issues Volume 706 (February 2026) A&A, 706 (2026) A272 Full HTML
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Table A.2

Line parameters of the detected molecules in B213-C16.

Species Line Frequency
(MHz)		 v
(km s−1)		 ∆v
(km s−1)		 TMB
(mK)		 ∫TMBdv
(mK km s−1)
2( 1, 2)- 1( 1, 1) A, vt=0 37464.20 6.42 ± 0.10 0.38 ± 0.76 16.74 ± 4.55 6.69 ± 2.62
2( 1, 2)-1(1, 1)E, vt=0 37686.93 – – ≤ 7.93 ≤ 4.37
CH3CHO 2( 0, 2)- 1(0, 1)E, vt=0 38506.03 6.59 ± 0.03 0.53 ± 0.06 59.89 ± 5.03 33.87 ± 3.55
2( 0, 2)- 1(0, 1) A, vt=0 38512.08 6.64 ± 0.03 0.51 ± 0.05 49.15 ± 4.27 26.66 ± 2.39
2( 1, 1)- 1( 1, 0) E, vt=0 39362.54 6.65 ± 0.07 0.67 ± 0.16 19.32 ± 4.21 13.87 ± 2.79
2( 1, 1)- 1( 1, 0) A, vt=0 39594.29 6.71 ± 0.05 0.55 ± 0.10 26.69 ± 4.65 15.48 ± 2.66
4( 1, 4)- 3(- 0, 3) E, vt=0 36169.26 6.74 ± 0.03 0.53 ± 0.09 35.93 ± 3.49 20.43 ± 2.35
7( 2, 5)- 8( 1, 8) E, vt=0 37703.76 – – ≤ 8.66 ≤ 4.77
CH3OH 7( 0, 7)- 6( 1, 6) A, vt=0 44069.37 – – ≤ 13.52 ≤ 6.89
1( 0, 1)- 0( 0, 0) A, vt=0 48372.46 6.647 ± 0.007 0.53 ± 0.02 438.14 ± 12.31 248.06 ± 6.82
1(- 0, 1)- 0(- 0, 0)E, vt=0 48376.89 6.72 ± 0.08 0.50 ± 0.19 43.19 ± 13.56 23.01 ± 7.11
CS 1-0 48990.95 6.597 ± 0.003 0.894 ± 0.007 1733.52 ± 15.76 1649.90 ± 10.73
H2CS 1(0, 1)- 0( 0, 0) 34351.43 6.766 ± 0.004 0.61 ± 0.01 282.06 ± 3.47 184.28 ± 2.40
HCNS 3-2 36908.48 – – ≤ 8.99 ≤ 5.01
4-3 49211.11 6.81 ± 0.08 0.52 ± 0.19 46.00 ± 13.06 25.52 ± 7.16
3( 1, 3)- 2( 1, 2) 34228.19 – – ≤ 6.89 ≤ 3.98
3( 2, 2)- 2( 2, 1) 34405.13 – – ≤ 8.02 ≤ 4.62
3( 2, 1)- 2( 2, 0) 34405.28 – – ≤ 8.38 ≤ 4.83
3( 0, 3)- 2( 0, 2) 34408.63 6.55 ± 0.07 0.97 ± 0.18 18.62 ± 3.40 19.18 ± 2.94
HSCN 3( 1,2)- 2( 1, 1) 34587.50 – – ≤ 7.76 ≤ 4.46
4( 1, 4)- 3( 1, 3) 45637.36 – – ≤ 14.06 ≤ 7.04
4( 2, 3)- 3( 2, 2) 45873.29 – – ≤ 14.37 ≤ 7.17
4( 2, 2)- 3( 2, 1) 45873.66 – – ≤ 15.63 ≤ 7.80
4( 0, 4)- 3( 0, 3) 45877.81 6.69 ± 0.11 0.77 ± 0.24 28.11 ± 9.01 23.05 ± 5.97
4( 1, 3)- 3( 1, 2) 46116.44 – – ≤ 14.50 ≤ 7.22
HCS+ 1-0 42674.20 6.68 ± 0.01 0.59 ± 0.03 97.43 ± 4.72 61.17 ± 2.83
OCS 3-2 36488.81 6.68 ± 0.05 1.06 ± 0.13 32.49 ± 4.08 36.69 ± 3.67
4-3 48651.60 6.46 ± 0.13 0.79 ± 0.20 31.69 ± 12.19 26.80 ± 7.33
SO2 6( 2,4)-7(1,7) 44052.86 – – ≤ 14.60 ≤ 7.44
N= 2- 1,J= 3-2 33751.37 6.683 ± 0.001 0.611 ± 0.003 993.88 ± 3.84 646.11 ± 2.62
CCS N= 3- 2, J= 3- 2 38866.42 6.696 ± 0.008 0.62 ± 0.02 163.66 ± 4.82 108.66 ± 3.03
N= 4- 3, J= 3- 2 43981.02 6.69 ± 0.01 0.52 ± 0.03 180.73 ± 8.35 99.70 ± 4.66
N= 3- 2, J= 4- 3 45379.05 6.811 ± 0.002 0.530 ± 0.003 1319.99 ± 7.59 745.30 ± 4.19
6-5 34684.37 6.751 ± 0.005 0.59 ± 0.01 318.28 ± 4.70 200.77 ± 3.09
C3S 7-6 40465.02 6.759 ± 0.004 0.592 ± 0.009 343.10 ± 5.17 216.03 ± 3.12
8-7 46245.62 6.76 ± 0.02 0.60 ± 0.04 356.55 ± 8.42 226.45 ± 13.28
CH3CCH 2( 0)-1(0) 34183.41 6.75 ± 0.03 0.58 ± 0.09 197.05 ± 4.37 120.87 ± 12.43
CH3N 2( 1)- 1( 1) 36794.77 – – ≤ 9.89 ≤ 5.12
2( 0)-1(0) 36795.47 6.05 ± 0.05 1.13 ± 0.13 53.10 ± 4.71 63.59 ± 6.10
J = 12- 11 31951.77 6.727 ± 0.002 0.638 ± 0.003 868.24 ± 4.08 589.92 ± 0.98
J = 13- 12 34614.39 6.752 ± 0.001 0.555 ± 0.003 954.20 ± 3.64 563.80 ± 2.32
J = 14 - 13 37276.99 6.822 ± 0.001 0.541 ± 0.003 908.68 ± 4.05 523.78 ± 2.49
HC5N J = 15 - 14 39939.59 6.889 ± 0.002 0.534 ± 0.003 822.36 ± 4.53 467.15 ± 2.66
J = 16 - 15 42602.15 6.777 ± 0.003 0.506 ± 0.007 475.58 ± 5.59 256.00 ± 3.06
J = 17 - 16 45264.72 6.747 ± 0.003 0.537 ± 0.007 626.89 ± 7.28 358.13 ± 4.04
J = 18 - 17 47927.27 6.770 ± 0.004 0.468 ± 0.009 617.10 ± 9.65 307.36 ± 4.93
J = 28 - 27 31583.70 6.69 ± 0.02 0.62 ± 0.04 92.76 ± 4.26 61.10 ± 3.14
J = 29 - 28 32711.68 6.84 ± 0.01 0.57 ± 0.05 83.94 ± 3.75 55.00 ± 2.70
J = 30 - 29 33839.63 6.64 ± 0.02 0.55 ± 0.04 72.69 ± 3.50 42.23 ± 2.27
J = 31 - 30 34967.59 6.78 ± 0.01 0.41 ± 0.10 82.07 ± 3.66 35.55 ± 1.86
J = 32 - 31 36095.53 6.67 ± 0.02 0.49 ± 0.05 61.80 ± 4.05 32.24 ± 2.47
J = 33 - 32 37223.49 6.77 ± 0.02 0.53 ± 0.07 54.06 ± 4.61 30.36 ± 2.79
HC7N J = 34 - 33 38351.45 6.84 ± 0.02 0.55 ± 0.06 48.61 ± 4.13 28.53 ± 2.56
J = 35 - 34 39479.41 6.97 ± 0.03 0.48 ± 0.06 43.22 ± 4.49 22.12 ± 2.49
J = 36 - 35 40607.33 6.69 ± 0.05 0.52 ± 0.10 30.92 ± 5.18 17.19 ± 2.91
J = 37 - 36 41735.26 6.75 ± 0.04 0.53 ± 0.10 35.14 ± 5.33 19.82 ± 3.11
J = 38 - 37 42863.20 6.09 ± 0.08 0.47 ± 0.14 20.80 ± 6.26 10.32 ± 3.16
J = 39-38 43991.13 – – ≤ 17.83 ≤ 9.10
J = 40 - 39 45119.06 – – ≤ 13.69 ≤ 6.89
J = 41 - 40 46246.98 – – ≤ 14.57 ≤ 7.25
J = 42 - 41 47374.90 – – ≤ 17.65 ≤ 8.67
J = 43 - 42 48502.81 – – ≤ 19.37 ≤ 9.41
J = 44 - 43 49630.72 – – ≤ 35.28 ≤ 16.93
PO+ 1-0 47024.25 – – ≤ 15.39 ≤ 7.59
N= 1- 0, J=1∕2-1∕2, F= 0- 1 47011.71 – – ≤ 16.36 ≤ 8.07
N= 1- 0, J=1∕2-1∕2, F= 1- 0 47124.24 – – ≤ 17.47 ≤ 8.61
CP N= 1- 0, J=1∕2-1∕2, F= 1- 1 47256.93 – – ≤ 18.35 ≤ 9.03
N= 1- 0, J=3∕2-1∕2, F= 1- 0 47979.86 – – ≤ 28.77 ≤ 14.05
N= 1- 0, J=3∕2-1∕2, F= 2- 1 47982.88 – – ≤ 16.8 ≤ 8.20
N= 1- 0, J=3∕2-1∕2, F= 1- 1 48112.5 – – ≤ 21.87 ≤ 10.66
HCP 1-0 39951.90 – – ≤ 9.08 ≤ 4.86
J=5∕2-3∕2, Ω=1∕2, F= 3- 2, l=e 31765.86 – – ≤ 9.21 ≤ 5.53
CCP J=5∕2-3∕2, Ω=1∕2, F= 3- 2, l=f 31832.45 – – ≤ 7.86 ≤ 4.71
J=7∕2-5∕2, Ω=1∕2, F= 4- 3, l=f 44558.92 – – ≤ 14.30 ≤ 7.25
4( 4, 0)- 4( 3, 1) 35360.93 – – ≤ 6.59 ≤ 3.74
5( 4, 1)- 5( 3, 2) 42139.19 – – ≤ 11.01 ≤ 5.73
4( 3, 1)- 4( 2, 2) 42231.25 – – ≤ 8.90 ≤ 4.63
c-C3H2 3( 2, 1)- 3( 1, 2) 44104.78 – – ≤ 20.97 ≤ 10.68
6( 5, 1)- 6(4, 2) 44624.90 – – ≤ 12.86 ≤ 6.51
5( 5, 0)- 5( 4, 1) 46645.05 – – ≤ 13.50 ≤ 6.68
2( 1, 1)- 2( 0, 2) 46755.61 6.669 ± 0.004 0.490 ± 0.009 679.77 ± 10.01 354.63 ± 5.27
2( 1, 1)- 2( 1, 2), J=3∕2-3∕2, F= 2- 2 44272.60 – – ≤ 19.91 ≤ 10.12
c-C3H 2( 1, 1)- 2( 1, 2), J=3∕2-3∕2, F= 1- 1
2( 1, 1)- 2( 1, 2), J=5∕2-5∕2, F= 3- 3		 44281.61
44610.39		 -
–		 -
–		 ≤ 19.85
≤ 11.96		 ≤ 10.09
≤ 6.06
2( 1, 1)- 2( 1, 2), J=5∕2-5∕2, F= 2- 2 44610.87 – – ≤ 11.80 ≤ 5.98
J=3∕2-1∕2, Ω=1∕2, F= 1- 1, l=f 32617.02 6.81 ± 0.08 0.67 ± 0.19 23.80 ± 3.67 17.05 ± 4.04
J=3∕2-1∕2, Ω=1∕2, F= 2- 1, l=f 32627.30 6.75 ± 0.02 0.62 ± 0.04 67.94 ± 3.82 44.69 ± 2.58
l-C3H J=3∕2-1∕2, Ω=1∕2, F= 1- 0, l=f 32634.39 6.74 ± 0.04 0.76 ± 0.09 30.43 ± 3.21 24.50 ± 2.52
J=3∕2-1∕2, Ω=1∕2, F= 2- 1, l=e 32660.65 6.66 ± 0.02 0.64 ± 0.05 67.62 ± 4.04 46.35 ± 2.84
J=3∕2-1∕2, Ω=1∕2, F= 1- 0, l=e 32663.36 6.69 ± 0.05 0.54 ± 0.11 28.21 ± 4.02 16.12 ± 2.59
J=3∕2-1∕2, Ω=1∕2, F= 1- 1, l=e 32667.67 – – ≤ 7.31 ≤ 4.32
2( 1,2)-1(1, 1) 42598.19 – – ≤ 8.41 ≤ 4.36
HOCO+ 2( 0, 2)- 1(0, 1) 42766.20 6.91 ± 0.06 0.51 ± 0.12 26.89 ± 6.02 14.61 ± 3.25
2( 1, 1)-1(1,0) 42926.80 – – ≤ 10.14 ≤ 5.23
N= 1- 0, J= 1- 1 32623.45 – – ≤ 7.61 ≤ 4.51
N= 2- 1, J= 1- 1 32738.61 – – ≤ 6.83 ≤ 4.04
CCO N= 2- 1, J= 1- 2 43103.88 – – ≤ 10.15 ≤ 5.23
N= 2- 1, J= 3- 2 45826.71 – – ≤ 15.01 ≤ 7.50
N= 2- 1, J= 2- 1 46182.19 – – ≤ 13.72 ≤ 6.83
C3O 4-3 38486.86 6.49 ± 0.08 0.89 ± 0.25 21.47 ± 4.63 21.27 ± 4.14
5-4 48108.50 6.96 ± 0.11 0.80 ± 0.21 40.16 ± 13.94 34.12 ± 8.74
4( 1, 4)- 3( 1, 3) 37018.92 – – ≤ 10.26 ≤ 5.70
4( 0, 4)- 3( 0, 3) 37904.85 6.58 ± 0.03 0.61 ± 0.08 47.64 ± 5.11 30.81 ± 3.39
4( 2, 3)- 3( 2, 2) 37939.62 – – ≤ 7.77 ≤ 4.26
4( 3, 2)- 3( 3, 1) 37952.63 – – ≤ 7.59 ≤ 4.17
4( 3, 1)- 3( 3, 0) 37952.73 – – ≤ 7.59 ≤ 4.17
4( 2, 2)- 3( 2, 1) 37974.37 – – ≤ 7.54 ≤ 4.14
4( 1, 3)- 3( 1, 2) 38847.74 6.41 ± 0.08 0.81 ± 0.17 12.27 ± 4.61 10.53 ± 2.01
5( 1,5)-4( 1,4) 46266.93 6.83 ± 0.11 1.15 ± 0.23 31.44 ± 8.97 38.78 ± 7.07
5( 0, 5)- 4( 0, 4) 47354.65 6.75 ± 0.06 0.65 ± 0.12 45.31 ± 10.20 31.50 ± 5.77
CH2CHCN 5( 2, 4)- 4( 2, 3) 47419.79 – – ≤ 16.71 ≤ 8.21
4( 1,3)-4( 0, 4) 47436.36 – – ≤ 18.37 ≤ 9.02
5( 3, 3)- 4( 3, 2) 47443.53 – – ≤ 18.56 ≤ 9.11
5( 3, 2)- 4( 3, 1) 47443.88 – – ≤ 17.43 ≤ 8.56
5(4, 2)- 4(4, 1) 47445.43 – – ≤ 18.40 ≤ 9.04
5(4, 1)- 4(4, 0) 47445.43 – – ≤ 18.40 ≤ 9.04
5( 2, 3)- 4( 2, 2) 47489.23 – – ≤ 15.38 ≤ 7.55
9( 0, 9)- 8( 1, 8) 47499.58 – – ≤ 14.61 ≤ 7.17
5( 1,4)-4( 1,3) 48552.56 6.61 ± 0.11 0.87 ± 0.20 38.43 ± 12.18 35.70 ± 7.86
5( 1, 4)- 5( 0, 5) 48634.28 – – ≤ 14.67 ≤ 7.11
3( 1, 3)- 2( 1, 2) 33438.37 – – ≤ 6.12 ≤ 3.58
H2CCS 3( 0, 3)- 2( 0, 2) 33611.70 – – ≤ 7.20 ≤ 4.20
3( 1, 2)- 2( 1, 1) 33783.23 – – ≤ 18.86 ≤ 10.98
4( 1, 4)- 3( 1, 3) 44584.34 – – ≤ 12.78 ≤ 6.47
4( 2, 3)- 3( 2, 2) 44810.21 – – ≤ 11.41 ≤ 5.77
4( 2, 2)- 3( 2, 1) 44810.56 – – ≤ 11.80 ≤ 5.96
4( 0, 4)- 3( 0, 3) 44815.32 – – ≤ 12.85 ≤ 6.49
4( 1, 3)- 3( 1, 2) 45044.18 – – ≤ 10.98 ≤ 5.53
HCO 5( 1,4)-5( 1, 5),J=92−92$\frac{9}{2}$-$\frac{9}{2}$,F=4-4 42222.60 – – ≤ 10.37 ≤ 5.40
5( 1,4)-5( 1, 5), J=92−92$\frac{9}{2}$-$\frac{9}{2}$,F=5-5 42229.19 – – ≤ 9.37 ≤ 4.88
5( 1,4)-5( 1, 5), J=112−112$\frac{11}{2}$-$\frac{11}{2}$,F=5-5 42825.36 – – ≤ 12.29 ≤ 6.35
5( 1,4)-5( 1, 5), J=112−112$\frac{11}{2}$-$\frac{11}{2}$, F= 6-6 42840.62 – – ≤ 10.31 ≤ 5.33
4( 1,3)-4( 0,4) 32742.82 – – ≤ 7.27 ≤ 4.30
5( 1, 4)- 5( 0, 5) 36417.24 – – ≤ 6.82 ≤ 3.82
t-CH3 CH2OH 6( 1, 5)- 6( 0, 6) 41124.95 – – ≤ 8.58 ≤ 4.52
4( 0,4)-3(1,3) 46832.80 – – ≤ 13.80 ≤ 6.82
7( 1, 6)- 7( 0, 7) 46980.15 – – ≤ 15.9 ≤ 7.84
10( 1,10)- 9( 2, 7) 48079.03 – – ≤ 17.29 ≤ 8.43
5( 1, 4)- 5( 0, 5) EE 39047.30 – – ≤ 9.79 ≤ 5.30
CH3OCH3 6( 1, 5)- 6( 0, 6) EE 43447.57 – – ≤ 11.84 ≤ 6.07
7( 1, 6)- 7( 0, 7) EE 48901.45 – – ≤ 19.69 ≤ 9.52
7( 1, 6)- 7( 0, 7) AA 48902.63 – – ≤ 18.99 ≤ 9.19
2( 1,2)-1(1,1) 43303.71 – – ≤ 10.02 ≤ 5.15
t-HCOOH 2( 0, 2)- 1(0, 1) 44911.74 – – ≤ 13.12 ≤ 6.62
2( 1,1)-1(1,0) 46581.23 – – ≤ 13.01 ≤ 6.44
7( 1, 6)- 7( 1, 7) 39295.95 – – ≤ 8.86 ≤ 4.78
5(0, 5)- 4( 1,4) 40778.14 – – ≤ 8.38 ≤ 4.44
2( 1,2)-1(1,1) 42541.36 – – ≤ 10.93 ≤ 5.67
c-HCOOH 2( 0, 2)- 1(0, 1) 43926.44 – – ≤ 12.42 ≤ 6.34
2( 1,1)-1(1,0) 45351.35 – – ≤ 12.54 ≤ 6.30
2(1,2)-1(1, 1) 41198.34 6.68 ± 0.02 0.51 ± 0.05 69.31 ± 5.25 37.64 ± 3.02
l-C3H2 2(0, 2)-1(0,1) 41584.68 6.71 ± 0.02 0.41 ± 0.08 59.51 ± 5.71 26.03 ± 3.22
2(1, 1)-1(1,0) 41967.67 6.70 ± 0.02 0.42 ± 0.05 78.47 ± 4.92 35.29 ± 2.62
HONC 2(0, 2)-1(0,1) 43813.37 – – ≤ 12.92 ≤ 6.60
13CS 1-0 46247.56 6.65 ± 0.08 0.68 ± 0.18 164.95 ± 9.66 119.50 ± 27.67
C34S 1-0 48206.94 6.671 ± 0.006 0.616 ± 0.02 542.63 ± 12.11 355.58 ± 7.08
C33S 1-0 48585.89 6.70 ± 0.04 0.42 ± 0.10 65.88 ± 12.57 29.29 ± 5.96
N= 2- 1,J= 3-2 33111.84 6.72 ± 0.03 0.69 ± 0.06 49.44 ± 3.84 36.33 ± 2.83
CC S N= 3- 2, J= 3- 2 38015.23 – – ≤ 8.47 ≤ 4.64
N= 4- 3, J= 3- 2 42918.18 – – ≤ 10.34 ≤ 5.34
N= 3- 2, J= 4- 3 44497.60 6.72 ± 0.03 0.56 ± 0.07 69.02 ± 7.25 41.30 ± 4.14
J=6-5 33844.24 6.53 ± 0.03 0.34 ± 0.70 23.18 ± 3.82 8.34 ± 1.95
CCC34S J=7-6 39484.87 – – ≤ 8.14 ≤ 4.38
J=8-7 45125.46 – – ≤ 11.30 ≤ 5.69
HC34S+ 1-0 41983.06 – – ≤ 9.55 ≤ 4.98
3-2 3596.87 – – ≤ 7.57 ≤ 4.29
4-3 47462.35 – – ≤ 15.26 ≤ 7.49
H2C34S 1(0, 1)- 0( 0, 0) 33765.80 – – ≤ 7.08 ≤ 4.12

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