Table 2
Gaussian fits for molecular transitions of COMs, including t-HCOOH and H2CO.
| Molecule | Frequency | Transition | Position | Ipeak (a) | Iint (a) | FWHM (a) | vsource (a) |
|---|---|---|---|---|---|---|---|
| (GHz) | (″,″) | (Jy beam−1) | (Jy beam−1 km s−1) | (km s−1) | (km s−1) | ||
| A-CH3OH | 331.5023 | 111,−0−110,+0 | (−0.31, 0.70) | 16.0 | 123.0 | 8.5 | 9.9 |
| 336.8651 | 121,−0−120,+0 | (−0.33, 0.82) | 14.9 | 112.4 | 8.2 | 10.2 | |
| 338.4087 | 70,+0−60,+0 | (−0.48, 0.85) | 14.7 | 124.6 | 10.4 | 9.9 | |
| 341.4156 | 71,−0−61,−0 | (−0.29, 0.86) | 12.6 | 87.7 | 8.0 | 8.7 | |
| 342.7298 | 131,−0−130,+0 | (−0.27, 0.75) | 14.9 | 109.5 | 8.3 | 9.1 | |
| 349.1070 | 141,−0−110,+0 | (−0.40, 0.76) | 15.7 | 120.4 | 8.3 | 11.0 | |
| 355.6029 | 130,+0−111,+0 | (−0.41, 1.03) | 13.9 | 99.5 | 7.5 | 10.4 | |
| 356.0072 | 151,−0−150,+0 | (−0.37, 0.82) | 17.1 | 134.4 | 8.5 | 10.8 | |
| 360.6616 | 31,+1−42,+1 | (−0.45, 0.98) | 10.6 | 76.1 | 7.4 | 9.5 | |
| E-CH3OH | 338.1244 | 70,0−60,0 | (−0.45, 0.87) | 14.8 | 102.8 | 7.4 | 9.8 |
| 338.3446 | 7−1,0−6−1,0 | (−0.50, 0.90) | 14.5 | 104.9 | 8.2 | 9.8 | |
| 360.8489 | 110,0−101,0 | (−0.41, 0.93) | 13.6 | 100.9 | 7.8 | 10.0 | |
| 13CH3OH | 330.0018 | 70,7,0−60,6,0 | (−0.59, 0.99) | 3.5 | 18.8 | 5.8 | 7.9 |
| 330.2528 | 70,7,+0−60,6,+0 | (−0.55, 1.07) | 3.8 | 24.6 | 8.0 | 8.3 | |
| 330.4424 | 71,6,0−61,5,0 | (−0.51, 0.93) | 3.5 | 16.7 | 5.5 | 8.0 | |
| 330.4639 | 111,10,−0−110,11,+0 | (−0.52, 0.94) | 6.1 | 32.1 | 6.1 | 7.7 | |
| 330.5352 | 72,5,0−62,4,0 | (−0.53, 1.02) | 4.9 | 26.6 | 6.1 | 7.6 | |
| 333.1148 | 71,6,−0−61,5,−0 | (−0.61, 0.98) | 3.5 | 22.6 | 6.6 | 8.8 | |
| 335.5602 | 121,11,−0−120,12,+0 | (−0.57, 1.05) | 4.0 | 22.8 | 5.8 | 9.2 | |
| C2H5OH | 338.8862 | 157,8,2−156,9,2 | (−0.94, 1.45) | 1.9 | 11.1 | 8.4 | 7.6 |
| 339.3126 | 127,5,2−126,6,2 | (−1.09, 1.67) | 1.1 | 7.8 | 7.6 | 9.1 | |
| 339.3984 | 117,4,2−116,5,2 | (−1.12, 1.63) | 1.0 | 6.4 | 7.8 | 8.4 | |
| CH3OCH3 | 339.4916 | 191,18,5−182,17,5 | (−0.54, 1.04) | 3.5 | 18.6 | 5.2 | 9.4 |
| 340.6126 | 103,7,1−92,8,1 | (−0.89, 1.21) | 2.9 | 16.2 | 6.6 | 7.7 | |
| 342.6080 | 190,19,0−181,18,0 | (−0.57, 1.22) | 4.7 | 27.7 | 5.7 | 9.4 | |
| 344.3578 | 191,19,3−180,18,3 | (−0.64, 1.15) | 4.4 | 27.3 | 6.6 | 8.8 | |
| 357.4602 | 182,17,1−171,16,1 | (−0.69, 1.08) | 4.8 | 28.3 | 7.0 | 8.0 | |
| 358.4541 | 55,1,1 − 44,1,1 | (−0.76, 1.17) | 7.3 | 63.0 | 10.6 | 10.2 | |
| 360.4660 | 201,19,0 − 192,18,0 | (−0.79, 1.22) | 4.0 | 25.9 | 6.1 | 10.9 | |
| 360.5847 | 200,20,0 − 191,19,0 | (−0.80, 1.23) | 5.3 | 35.8 | 6.9 | 10.1 | |
| CH3OCHO | 333.4494 | 311,31,0 − 300,30,0 | (−0.69, 1.14) | 4.0 | 23.5 | 6.0 | 8.9 |
| 336.3514 | 276,22,1 − 266,21,1 | (−0.82, 1.24) | 2.2 | 15.6 | 7.0 | 10.3 | |
| 344.0296 | 191,18,5 − 182,17,5 | (−0.52, 1.08) | 4.4 | 29.4 | 7.1 | 10.1 | |
| 354.6081 | 191,18,5 − 182,17,5 | (−0.65, 1.23) | 4.0 | 24.4 | 6.7 | 9.5 | |
| t-HCOOH | 334.2658 | 152,14 − 142,13 | (−0.03, 0.46) | 2.5 | 15.8 | 6.9 | 10.2 |
| 343.9523 | 151,14 − 141,13 | (0.03, 0.37) | 2.4 | 17.1 | 7.8 | 11.2 | |
| H2CO (b) | 351.7686 | 51,5 − 41,4 | (−0.03, 0.52) | 13.1 | 88.0 | 6.3 | 13.9 |
| 51,5 − 41,4 | (−0.83, 1.72) | 11.0 | 47.1 | 3.7 | 6.5 | ||
Notes. The transitions listed here, as well as the transitions listed in Tables 3 and 4, were relatively isolated and unblended, and were used to make the emission maps shown in Fig. 11. (a)Typical uncertainties on the Gaussian centroid fits are (0′′.2, 0′′.2) for the position, 0.3 Jy beam−1 for Ipeak, Jy beam−1 km s−1 for Iint, and 0.4 km s−1 for the FWHM and vsource. (b)The two entries for H2CO are red- and blueshifted lines, respectively. See also entries for CS.
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