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Home All issues Volume 657 (January 2022) A&A, 657 (2022) A78 Full HTML
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Table A.1

List of transitions and line parameters used in this work.

Molecule Transition ν a FWHMb Line fluxb
(GHz) (K) (10−5 s−1) (km s−1) (K) (K km s−1) (km s−1)
HCOOCH3 c 2017,3 - 1917,2 A 245.5175 315.5 82 6.23 3.2 ± 0.4 4.29 14.6 ± 0.3 12.2 ± 0.2
HCOOCH3 c 2017,4 - 1917,3 A 245.5175 315.5 82 6.23
                   
HCOOCH3 2015,5 - 1915,4 E 245.6567 273.1 82 9.83 2.7 ± 0.1 4.25 12.3 ± 0.4 12.3 ± 0.1
HCOOCH3 2015,6 - 1915,5 E 245.6729 273.1 82 9.84 2.6 ± 0.1 5.02 13.8 ± 0.5 12.3 ± 0.1
                   
HCOOCH3 c 2014,6 - 1914,5 A 245.7522 253.9 82 11.5 4.1 ± 0.1 7.54 32.8 ± 0.5 11.2 ± 0.1
HCOOCH3 c 2014,7 - 1914,6 A 245.7522 253.9 82 11.5
                   
HCOOCH3 2014,7 - 1914,6 E 245.7726 253.9 82 11.5 2.7 ± 0.1 6.64 18.9 ± 0.5 12.6 ± 0.1
HCOOCH3 214,18 - 203,17 E 246.0275 139.8 86 2.37 2.6 ± 0.1 4.08 11.1 ± 0.4 12.4 ± 0.1
HCOOCH3 212,19 - 203,18 E 246.0388 139.8 86 2.37 2.5 ± 0.1 4.38 11.7 ± 0.4 12.5 ± 0.1
HCOOCH3 2011,9 - 1911,8 E 246.2854 204.2 82 15.8 2.8 ± 0.2 6.05 18.3 ± 0.7 12.4 ± 0.1
                   
HCOOCH3 c 2011,10 - 1911,9 A 246.2951 204.2 82 15.8 3.2 ± 0.3 7.91 27.3 ± 1.8 12.6 ± 0.1
HCOOCH3 c 2011,9 - 1911,8 A 246.2951 204.2 82 15.8
                   
HCOOCH3 2011,10 - 1911,9 E 246.3082 204.2 82 15.8 2.8 ± 0.1 6.14 18.0 ± 0.7 12.3 ± 0.1
HCOOCH3 221,21 - 211,20 A, νt = 1 246.4884 330.4 90 22.2 2.7 ± 0.1 4.86 13.8 ± 0.4 12.3 ± 0.1
HCOOCH3 2010,11 - 1910,10 E 246.6231 190.3 82 17.4 2.6 ± 0.1 7.04 19.4 ± 0.7 12.3 ± 0.1
HCOOCH3 154,12 - 143,11 A 246.6834 81.8 62 1.17 2.8 ± 0.5 3.12 9.3 ± 1.3 12.4 ± 1.2
HCOOCH3 222,21 - 212,20 E, νt = 1 246.7065 329.9 90 22.3 2.7 ± 0.2 4.28 12.2 ± 0.6 12.4 ± 0.1
HCOOCH3 221,21 - 211,20 E,, νt = 1 246.7317 329.9 90 22.3 2.7 ± 0.1 5.22 14.8 ± 0.5 12.3 ± 0.1
HCOOCH3 105,5 - 94,5 E 246.7529 49.1 42 1.25 2.2 ± 0.2 2.78 6.4 ± 0.7 12.3 ± 0.1
HCOOCH3 192,17 - 182,16 E 246.8916 126.2 78 21.8 3.3 ± 0.1 8.02 27.9 ± 0.7 12.4 ± 0.1
HCOOCH3 194,15 - 184,14 A 246.9146 126.2 78 21.8 3.0 ± 0.1 8.15 26.3 ± 0.8 12.3 ± 0.1
HCOOCH3 105,6 - 94,6 E 246.9457 49.1 42 1.26 2.4 ± 0.2 3.41 8.7 ± 0.7 12.2 ± 0.1
HCOOCH3 206,15 - 196,14 A, νt = 1 246.9852 335.4 82 20.7 2.4 ± 0.1 4.85 12.4 ± 0.6 12.4 ± 0.1
HCOOCH3 209,12 - 199,11 E 247.0636 177.8 82 18.2 2.7 ± 0.1 6.77 19.7 ± 0.9 12.2 ± 0.1
HCOOCH3 105,5 - 94,6 A 247.1242 49.1 42 1.82 3.1 ± 0.3 3.20 10.5 ± 0.5 12.4 ± 0.1
HCOOCH3 209,11 - 208,12 E 231.9552 177.8 82 1.56 2.5 ± 0.5 2.28 6.1 ± 1.0 12.1 ± 0.2
HCOOCH3 199,10 - 198,11 A 232.6172 166.0 78 1.53 2.2 ± 0.3 3.15 7.5 ± 0.8 12.2 ± 0.2
HCOOCH3 199,11 - 198,12 A 232.6252 166.0 78 1.53 2.4 ± 0.3 2.77 7.1 ± 0.8 12.4 ± 0.2
HCOOCH3 1910,10 - 1810,9 E, νt = 1 232.6839 365.5 78 13.8 2.2 ± 0.3 3.19 7.4 ± 0.8 12.4 ± 0.1
HCOOCH3 198,11 - 188,10 E, νt = 1 232.7386 342.0 78 15.7 2.0 ± 0.3 4.07 8.7 ± 1.0 12.4 ± 0.1
HCOOCH3 198,11 - 188,10 A, νt = 1 232.8396 341.8 78 15.7 2.4 ± 0.3 3.32 8.5 ± 0.9 12.3 ± 0.1
CH3OH 183,16 − 174,13 A 232.7834 446.5 148 2.17 3.5 ± 0.2 6.94 26.2 ± 1.3 12.4 ± 0.1
CH3OH 10−3,8 −11−2,10 E 232.9457 190.4 84 2.13 4.3 ± 0.2 9.50 43.1 ± 1.6 12.7 ± 0.1
CH3OH 193,16 − 192,17 E 246.8733 490.7 156 8.27 4.2 ± 0.1 11.24 49.8 ± 0.7 12.4 ± 0.1
5−1,5 − 4−1,4 E 231.7358 39.0 44 5.13 4.3 ± 0.8 1.75 8.0 ± 1.3 12.1 ± 0.4
                   
53,2 − 43,1 E 231.8013 81.3 44 3.42 3.8 ± 0.8 2.69 10.9 ± 1.8 11.4 ± 0.4
52,4 − 42,3 A 231.8015 70.9 44 4.53
                   
51,4 − 41,3 E 231.8267 54.1 44 5.33 2.7 ± 0.7 1.46 4.1 ± 0.9 12.3 ± 0.3
5−2,4 − 4−2,3 E 231.8538 59.2 44 4.49 3.8 ± 1.1 1.40 5.6 ± 1.3 10.5 ± 0.4
52,3 − 42,2 E 231.8645 55.8 44 4.41 3.5 ± 0.8 1.30 4.9 ± 1.0 11.3 ± 0.4
CH2DOH 41,4 − 41,3 E1 246.9731 37.7 9 2.15 2.9 ± 0.2 3.48 10.6 ± 0.6 12.4 ± 0.1
CH3OCH3 c,d,e 130,13 − 121,12 AA 231.9878 80.9 270 9.15 2.9 ± 0.2 6.52 20.3 ± 1.1 12.3 ± 0.1
CH3OCH3 c,d,e 130,13 − 121,12 EE 231.9879 80.9 432 9.15
CH3OCH3 c,d,e 130,13 − 121,12 AE 231.9879 80.9 162 9.15
CH3OCH3 c,d,e 130,13 − 121,12 EA 231.9879 80.9 108 9.15
                   
CH3OCH3 f 175,12 − 174,13 AE 259.3094 174.5 140 8.74 2.1 ± 0.3 3.83 8.6 ± 1.1 12.2 ± 0.1
CH3OCH3 f 175,12 − 174,13 EA 259.3097 174.5 140 8.74
                   
CH3OCH3 f 175,12 − 174,13 EE 259.3119 174.5 560 8.76 1.6 ± 0.2 5.20 9.0 ± 1.0 12.1 ± 0.1
CH3COCH3 c 214,17 − 205,16 AE 245.2965 145.1 258 53.9 2.8 ± 0.9 1.85 5.4 ± 1.4 12.5 ± 0.4
CH3COCH3 c 215,17 − 204,16 AE 245.2965 145.1 86 53.9
CH3COCH3 c 214,17 − 205,16 EA 245.2965 145.1 172 53.9
CH3COCH3 c 215,17 − 204,16 EA 245.2965 145.1 172 53.9
                   
CH3COCH3 c 214,17 − 205,16 AA 245.4095 145.0 430 53.9 2.8 ± 0.2 2.00 5.9 ± 0.5 12.4 ± 0.1
CH3COCH3 c 215,17 − 204,16 AA 245.4095 145.0 258 53.9
                   
CH3COCH3 c 223,19− 214,18 EE 246.4504 149.6 720 58.2 2.6 ± 0.1 3.64 10.3 ± 0.5 12.2 ± 0.1
CH3COCH3 c 224,19− 214,18 EE 246.4504 149.6 720 1.2
CH3COCH3 c 223,19− 213,18 EE 246.4504 149.6 720 0.81
CH3COCH3 c 224,19− 213,18 EE 246.4504 149.6 720 58.6
CH3CHO d 123,10− 113,9 E 231.7487 92.5 50 39.4 3.9 ± 0.8 1.46 5.7 ± 0.9 12.4 ± 0.4
CH3CHO d 123,9− 113,8 E 231.8475 92.6 50 39.4 3.1 ± 0.4 2.26 7.5 ± 1.0 13.1 ± 0.2
CH3CN f 141− 131 257.5224 99.8 58 147 4.6 ± 0.1 18.2 89.2 ± 2.1 12.3 ± 0.1
CH3CN f 140− 130 257.5274 92.7 58 148 3.9 ± 0.1 19.05 81.8 ± 2.7 12.3 ± 0.1
13CH3CN 133− 123 232.1949 142.4 108 102 2.5 ± 0.3 3.51 9.4 ± 1.1 12.5 ± 0.1
13CH3CN 131− 121 232.2298 85.2 54 107 2.4± 0.3 3.34 8.4 ± 1.1 12.2 ± 0.2
13CH3CN 130− 120 232.2341 78.0 54 108 2.4 ± 0.4 3.35 8.5 ± 1.3 12.3 ± 0.2
C2H5CN 263,24− 253,23 232.7900 161.0 53 105 3.3 ± 0.8 1.44 5.0 ± 1.1 12.3 ± 0.4
                   
C2H5CN c 2610,16− 2510,15 232.9623 262.0 53 91.2 2.3 ± 0.6 1.98 4.8 ± 1.0 12.4 ± 0.2
C2H5CN c 2610,17− 2510,16 232.9623 262.0 53 91.2
                   
C2H5CN c 269,17− 259,16 232.9675 240.9 53 94.2 2.8 ± 0.7 1.61 4.8 ± 1.0 12.4 ± 0.3
C2H5CN c 269,18− 259,17 232.9675 240.9 53 94.2
                   
C2H5CN c 2611,15− 2511,14 232.9755 285.2 53 87.9 1.6 ± 1.0 2.15 3.7 ± 0.8 12.3 ± 0.1
C2H5CN c 2611,16− 2511,15 232.9755 285.2 53 87.9
                   
C2H5CN c 268,19− 258,18 232.9987 222.0 53 96.9 2.7 ± 0.4 2.29 6.7 ± 0.9 12.7 ± 0.2
C2H5CN c 268,18− 258,17 232.9987 222.0 53 96.9
                   
C2H5CN c 267,20− 257,19 233.0693 205.4 53 99.4 2.7 ± 0.5 2.73 7.8 ± 1.2 12.5 ± 0.3
C2H5CN c 267,19− 257,18 233.0693 205.4 53 99.4
NH2CHO 112,10− 102,9 232.2736 78.9 23 88.2 3.5 ± 0.4 2.56 9.6 ± 1.0 12.0 ± 0.2
NH2CHO f 121,12− 111,11 243.5210 79.2 25 105 1.7 ± 0.2 5.71 10.1 ± 0.9 13.0 ± 0.1

Notes: a The frequencies and spectroscopic parameters of HCOOCH3, CH2DOH, CH3COCH3, and CH3CHO have been extracted from the JPL catalogue (Pickett et al. 1998). The frequencies and spectroscopic parameters of CH3OH, , CH3OCH3, CH3CN, 13CH3CN, C2H5CN, and NH2CHO have been extracted from the CDMS catalogue (Müller et al. 2001, 2005).

b Parameters and uncertainties determined by Gaussian fit.

c The lines cannot be distinguished.

d Estimated after subtracting the small contribution from HCOOCH3.

e Estimated after subtracting the small contribution from C2H5CN.

f Lines from narrow spws (58.59 MHz) and different channel width (~ 0.15 km s−1) (see Table. 1).

* The collisional coefficients have not been calculated for the E transition so we used only the A transition in the LVG. We assumed a flux value equal to 40% of the total line flux because the A transition would be less populated with respect to the E one given that it has lower Eup and Aij. However, the result does not change much if we assume a value between 30% and 60% of the total flux.

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