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This article has an erratum: [https://doi.org/10.1051/0004-6361/201732216e]

Table A.1

Spectral lines observed in IK Tau with ALMA.

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15)
Molecule Quantum νrest Elow Velocitya Velocitya Peakb Integratedb Velocitya Velocitya Peakb Integratedb Angulara Commentc Commentd
numbers width asymmetry flux flux width asymmetry flux flux width line mom0
[GHz] [K] [km s−1] [km s−1] [Jy] [Jy km s−1] [km s−1] [km s−1] [Jy] [Jy km s−1] [mas] identification map
Aperture 320 mas Aperture 800 mas
SO2 204,16 → 203,17 (ν2 = 1) 335.1285 963 10.48 −0.4 0.043 0.261 5.24 1.2 0.030 0.054 478 Single –
SiO 8 → 7 (v = 5) 335.2820 8735 13.97 −5.4 0.059 0.578 12.22 −3.6 0.044 0.349 333 Single Compact
Si34S 19 → 18 (v = 0) 335.3419 145 41.90 0.4 0.393 8.200 38.41 0.4 0.374 7.888 1028 Single –
SO18O 425,37 → 416,36 335.4791 837 5.24 3.0 0.033 0.205 − − − − 391 Single –
29SiO 8 → 7 (v = 3) 335.8807 5282 22.66 −1.8 5.055 35.268 20.92 −3.6 5.017 34.258 565 Single Compact
TiO2 519,43 → 5010,40 336.0286 1050 13.94 −11.5 (0.014) − 5.23 −6.3 (0.009) − 391 Uncertain Compact
SO2 233,21 → 232,22 336.0892 260 33.10 −2.7 0.224 2.602 31.36 −1.0 0.141 1.987 768 Single except uncert. blend –
SO2 4212,30 → 4311,33 336.1135 1166 − − (0.018) − − − (0.009) − − Uncertain blend* –
H2O 52,3 → 61,6 (ν2 = 1) 336.2279 2940 19.16 −2.7 0.566 3.814 19.16 −2.7 0.396 2.167 434 Single Compact
SO 1110 → 1010 336.5533 1130 8.70 1.4 0.030 0.188 − − 0.009 − 478 Single –
30SiO 8 → 7 (v = 1) 336.6030 1805 26.09 −2.5 54.989 315.540 26.09 −2.5 54.960 313.363 623 Single Compact
SO2 167,9 → 176,12 336.6696 2917 17.39 −5.0 0.048 0.389 − − 0.009 − 507 Single Compact
SO2 201,19 → 192,18 (ν2 = 1) 336.7607 928 10.43 −1.7 0.042 0.326 − − − − 507 Single –
29SiS 19 → 18 (v = 1) 336.8150 1207 11.48 0.0 0.042 0.374 8.00 0.0 0.032 0.282 478 Low blend –
TiO2 238,16 → 237,17 336.8241 256 7.09 0.0 (0.018) − 0.14 0.0 (0.009) − 376 Minor high blend Compact
TiO2 251,25 → 240,24 337.1961 198 8.38 0.0 (0.021) − 1.43 0.0 (0.009) − 333 Low blend –
TiO2 241,23 → 232,22 337.2061 196 12.04 0.0 (0.033) − − − (0.013) − 550 High blend –
C34S 7 → 6 (v = 0) 337.3965 49 41.65 0.0 0.049 1.236 36.44 −1.6 0.104 2.240 1188 Single Irregular
34SO 88 → 77 337.5822 70 29.49 8.9 0.102 1.143 29.49 8.9 0.077 1.115 724 Single Irregular
SiO 8 → 7 (v = 4) 337.6873 7034 19.07 −2.1 0.191 1.722 15.61 −2.1 0.099 0.835 362 Single Compact
34SO2 345,29 → 344,30 337.8727 593 6.28 0.0 (0.013) − − − (0.009) − 318 Minor low blend −
SO 87 → 76 (v = 1) 337.8862 1664 25.22 0.0 0.087 0.927 21.75 0.0 0.048 0.578 376 High blend Compact
TiO2 2316,8 → 2415,9 337.8946 465 − − (0.035) − − − (0.039) − − Negligible blend* −
NaCl 26 → 25 (v = 0) 338.0219 203 38.11 0.6 0.071 1.684 27.71 −6.2 0.087 1.437 797 Single Arc-off-NW
29SiO 8 → 7 (v = 2) 338.2452 3558 15.58 −6.8 0.254 1.933 12.12 −6.8 0.159 0.970 217 Single Compact
SO2 184,14 → 183,15 338.3060 181 40.32 0.0 0.253 3.171 33.40 0.0 0.170 2.576 637 Low blend −
29SiS 19 → 18 (v = 0) 338.4474 146 44.98 0.1 0.544 11.137 41.52 0.1 0.609 11.606 1043 Single −
SO2 201,19 → 192,18 338.6118 183 39.77 −1.0 0.404 4.458 34.58 −2.7 0.340 4.170 855 Single −
30SiO 8 → 7 (v = 0) 338.9301 57 55.28 4.0 3.419 58.813 51.83 4.0 4.346 79.617 1231 Single except negl. blend −
H2O 166,11 → 173,14 (ν2 = 0) 339.0440 5485 12.09 −3.5 0.052 0.413 15.54 −13.8 0.034 0.280 275 Single Compact
SO 33 → 23 339.3415 9 5.18 −2.4 0.028 0.164 − − − − 260 Single −
34SO 89 → 78 339.8576 61 32.73 1.8 0.094 1.233 39.62 −5.0 0.089 1.770 507 Single −
Si33S 19 → 18 (v = 0) 339.9110 147 34.45 4.6 0.074 1.420 32.73 2.9 0.079 1.549 811 Single Irregular
SiO 8 → 7 (v = 3) 340.0947 5316 20.66 −5.4 6.024 15.349 22.38 −10.6 5.974 16.041 449 Single except negl. blend −
30Si34S 20 → 19 (v = 0) 340.1013 155 − − (0.202) − − − (0.166) − − Negligible blend* −
SO2 282,26 → 281,27 340.3164 376 29.25 1.4 0.168 1.931 29.25 1.4 0.112 1.337 579 Single −
29SiO 8 → 7 (v = 1) 340.6119 1816 20.63 −2.7 0.396 3.305 17.19 0.6 0.329 2.485 492 Single Compact
SO 87 → 76 340.7142 65 44.68 −1.4 0.782 12.763 44.68 −1.4 0.911 18.389 1260 Single Irregular
33SO 88 → 77 340.8396 70 5.15 −2.4 0.023 0.199 − − − − 362 Hyper Irregular
33SO 88 → 77 340.8417 70 − − 0.015 − − − 0.014 − − Minor hyper* −
SO2 218,14 → 227,15 341.2755 353 17.16 3.2 0.046 0.401 10.29 3.2 0.046 0.263 362 Single −
SO2 5214,38 → 5313,41 341.3219 1729 9.26 0.0 0.043 0.456 5.83 0.0 0.035 0.223 275 Low blend Compact
SO2 536,48 → 527,45 341.3233 1396 12.29 0.0 0.043 0.437 12.29 0.0 0.035 0.188 289 High blend Compact
SO2 404,36 → 403,37 341.4031 792 21.51 0.0 0.146 1.375 18.08 0.0 0.087 0.794 463 Low blend −
SiS 19 → 18 (v = 2) 341.4223 2283 9.94 0.0 0.047 0.409 − − 0.009 − 304 High blend Compact
SO 88 → 77 (v = 1) 341.5591 1671 17.14 0.4 0.070 0.586 10.29 0.4 0.042 0.310 318 Single Compact
SO2 365,31 → 364,32 341.6740 662 22.28 1.5 0.215 1.986 15.42 −5.2 0.151 1.054 463 Single −
SO2 233,21 → 232,22 (ν2 = 1) 342.4359 1005 11.97 −2.0 0.039 0.319 − − − − 405 Single Irregular
SiO 8 → 7 (v = 2) 342.5044 3580 20.51 −0.0 0.566 3.554 15.39 −5.2 0.471 2.569 347 Single Compact
CO 3 → 2 (v = 1) 342.6476 3101 13.67 −2.4 0.108 0.518 5.13 6.1 0.114 −0.238 434 Single −
SO2 343,31 → 342,32 342.7616 566 18.79 0.5 0.210 2.106 20.50 −1.1 0.266 3.144 797 Single Irregular
TiO2 66,0 → 55,1 342.8618 38 − − (0.337) − − − (0.569) − − Negligible blend* −
TiO2 128,4 → 127,5 342.8768 111 − − (0.935) − − − (3.835) − − Negligible blend* −
CS 7 → 6 (v = 0) 342.8828 49 47.81 −1.0 1.096 32.297 47.81 −1.0 3.943 110.954 3360 Single except negl. blend Resolved out
29SiO 8 → 7 (v = 0) 342.9808 58 54.63 6.4 4.456 96.122 59.75 11.5 10.128 231.160 3360 Single except negl. blend Resolved out
TiO2 118,4 → 117,5 343.0041 102 − − (0.281) − − − (0.508) − − Negligible blend* −
TiO2 108,2 → 107,3 343.0970 94 − − (0.302) − − − (0.456) − − Negligible blend* −
SiS 19 → 18 (v = 1) 343.1010 1220 25.60 6.5 0.482 5.255 25.60 9.9 0.550 6.627 695 Single except negl. blend Irregular
Na37Cl 27 → 26 343.4774 215 − − (0.054) − − − (0.110) − − Uncertain blend* −
SO 89 → 78 (v = 1) 343.8285 1662 10.22 −3.8 (0.119) − 10.22 −3.8 (0.195) − 579 Uncertain Irregular
SO2 242,22 → 233,21 (ν2 = 1) 343.9237 1022 6.81 −1.3 0.048 0.259 − − − − 376 Single Irregular
AlO 917∕2 → 815∕2 344.2999 66 − − 0.437 − − − 1.434 − − Negligible blend* −
SO 88 → 77 344.3106 71 43.19 0.0 1.047 20.167 46.59 0.0 2.171 51.215 3680 Low-mid blend Resolved out
AlO 917∕2 → 815∕2 344.3308 66 − − 0.182 − − − 0.446 − − Negligible blend* −
AlO 917∕2 → 815∕2 344.4279 66 − − 0.027 − − − 0.064 − − Minor hyper* −
AlO 917∕2 → 815∕2 344.4334 66 − − 0.023 − − − 0.076 − − Minor hyper* −
AlO 917∕2 → 815∕2 344.4403 66 − − 0.037 − − − 0.134 − − Minor hyper* −
AlO 917∕2 → 815∕2 344.4519 66 − − 0.030 − − − 0.140 − − Minor hyper* −
AlO 919∕2 → 817∕2 344.4575 66 3.40 −0.3 0.036 0.247 32.30 14.9 0.186 3.211 1760 Hyper Faint scatter
AlO 919∕2 → 817∕2 344.4581 66 − − 0.036 − − − 0.186 − − Minor hyper* −
34SO2 191,19 → 180,18 344.5810 151 8.50 −4.6 (0.032) − 8.50 −8.0 (0.009) − 724 Uncertain Irregular
SO2 282,26 → 281,27 (ν2 = 1) 344.6137 1121 11.89 −2.1 0.054 0.384 3.40 −0.4 0.080 0.568 333 Single Irregular
SiS 19 → 18 (v = 0) 344.7795 149 56.04 −2.5 5.970 133.782 57.74 −0.8 12.347 286.430 3040 Single Resolved out
SiO 8 → 7 (v = 1) 344.9163 1828 28.86 1.0 3.756 32.304 28.86 1.0 4.235 37.781 1086 Single Core-halo
SO2 404,36 → 403,37 (ν2 = 1) 344.9742 1538 11.68 0.0 0.050 0.468 11.68 0.0 0.116 0.633 507 Low blend Irregular
SO2 132,12 → 121,11 345.3385 76 43.98 0.0 (0.981) − 47.37 0.0 (3.629) − 6880 Minor low blend Resolved out
H13CN 4 → 3 345.3397 25 45.49 0.0 1.108 34.230 48.88 0.0 4.025 119.990 6880 High blend Resolved out
SO2 269,17 → 278,20 345.4490 505 8.47 3.5 0.050 0.385 8.47 3.5 0.083 0.585 492 Single Irregular
CO 3 → 2 345.7960 17 67.73 −19.6 4.724 136.960 69.42 −17.9 17.866 517.253 9760 Minor blend blue wing Resolved out
AlOH 1123∕2 → 1023∕2 346.1534 83 − − 0.051 − − − 0.110 − − Minor hyper* −
AlOH 1121∕2 → 1023∕2 346.1544 83 − − 0.047 − − − 0.092 − − Minor hyper* −
AlOH 1127∕2 → 1025∕2 346.1555 83 − − 0.047 − − − 0.092 − − Minor hyper* −
AlOH 1125∕2 → 1023∕2 346.1555 83 − − 0.047 − − − 0.092 − − Minor hyper* −
AlOH 1123∕2 → 1021∕2 346.1555 83 − − 0.047 − − − 0.092 − − Minor hyper* −
AlOH 1121∕2 → 1019∕2 346.1555 83 − − 0.047 − − − 0.092 − − Minor hyper* −
AlOH 1119∕2 → 1017∕2 346.1555 83 − − 0.047 − − − 0.092 − − Minor hyper* −
AlOH 1117∕2 → 1015∕2 346.1555 83 − − 0.047 − − − 0.092 − − Minor hyper* −
AlOH 1121∕2 → 1021∕2 346.1566 83 11.84 1.0 0.073 0.466 11.84 1.0 0.121 0.794 333 Hyper −
AlOH 1119∕2 → 1019∕2 346.1591 83 − − 0.041 − − − 0.034 − − Minor hyper* −
AlOH 1119∕2 → 1021∕2 346.1602 83 − − 0.026 − − − 0.059 − − Minor hyper* −
AlOH 1117∕2 → 1017∕2 346.1608 83 − − 0.026 − − − 0.059 − − Minor hyper* −
NS 15∕2 → 13∕2 346.2201 54 − − 0.069 − − − 0.211 − − Minor hyper* −
NS 15∕2 → 13∕2 346.2212 54 − − 0.069 − − − 0.214 − − Minor hyper* −
NS 15∕2 → 13∕2 346.2212 54 38.90 1.3 0.101 2.376 38.90 1.3 0.296 6.892 652 Hyper Arc-off-W
29Si34S 20 → 19 (v = 0) 346.3086 158 5.07 3.8 (0.048) − 3.38 −1.2 (0.095) − 405 Uncertain Arc-off-W
SO2 343,31 → 342,32 (ν2 = 1) 346.3653 1311 9.00 0.0 0.056 0.440 − − − − 318 Low blend −
SO2 191,19 → 180,18(ν2 = 1) 346.3792 897 7.51 0.0 0.077 0.686 − − − − 681 High blend Irregular
SO2 164,12 → 163,13 346.5239 148 36.70 0.0 (1.010) − 43.46 0.0 (2.144) − 1811 Minor low blend Irregular
SO 89 → 78 346.5285 62 46.58 0.0 1.174 24.875 46.58 0.0 2.268 58.264 1956 High blend Irregular
SO2 191,19 → 180,18 346.6522 152 37.16 −1.5 0.487 7.220 43.92 1.8 0.701 14.062 1956 Single Irregular
SiO 8 → 7 (v = 0) 347.3306 58 72.54 −0.4 6.250 150.481 67.43 2.9 12.504 307.476 2028 Single −
TiO 11 → 10 348.1598 82 10.09 −2.0 0.024 0.153 − − − − 289 Single Compact
30SiS 20 → 19 (v = 1) 348.3621 1211 26.77 0.0 0.039 0.604 23.41 0.0 0.040 0.487 623 Low blend Irregular
SO2 242,22 → 233,21 348.3878 276 36.57 0.0 0.182 1.986 16.40 0.0 0.147 1.390 608 High blend −
NS 15∕2 → 13∕2 348.5013 373 − − 0.013 − − − 0.009 − − Minor hyper* −
NS 15∕2 → 13∕2 348.5013 373 − − 0.013 − − − 0.009 − − Minor hyper* −
NS 15∕2 → 13∕2 348.5059 373 − − 0.019 − − − 0.009 − − Minor hyper* −
NS 15∕2 → 13∕2 348.5062 373 − − 0.015 − − − 0.032 − − Minor hyper* −
NS 15∕2 → 13∕2 348.5125 373 − − 0.028 − − − 0.017 − − Minor hyper* −
NS 15∕2 → 13∕2 348.5125 373 26.88 −3.4 0.033 0.513 3.36 3.2 0.051 0.314 492 Hyper −
NS 15∕2 → 13∕2 348.5144 373 − − 0.021 − − − 0.009 − − Minor hyper* −
NS 15∕2 → 13∕2 348.5144 373 − − 0.021 − − − 0.009 − − Minor hyper* −
NS 15∕2 → 13∕2 348.5159 373 − − 0.031 − − − 0.051 − − Minor hyper* −
NS 15∕2 → 13∕2 348.5159 373 − − 0.031 − − − 0.051 − − Minor hyper* −
SO2 3110,22 → 329,23 349.2271 684 11.74 −1.9 0.034 0.308 10.06 6.4 0.047 0.426 507 Single Irregular
AlCl 24 → 23 349.4443 193 6.70 −2.9 0.024 0.228 3.35 −2.9 0.040 0.255 434 Hyper Irregular
SO2 465,41 → 464,42 349.7833 1055 16.74 −1.0 0.174 1.353 8.37 0.6 0.141 0.884 478 Single −
30SiS 20 → 19 (v = 0) 350.0356 160 41.82 1.1 0.399 7.670 40.15 −0.4 0.419 7.644 884 Single −
SO2 106,4 → 115,7 350.8628 122 8.34 −3.8 0.024 0.178 − − 0.012 − 362 Single Arc-SE
Si18O 9 → 8 (v = 5) 350.9593 8442 22.57 0.0 (0.043) − 12.56 0.0 (0.020) − 478 Minor low blend Irregular
NaCl 27 → 26 (v = 0) 350.9693 219 37.09 0.0 0.067 1.601 20.41 0.0 0.093 1.180 594 High blend Arc-SW
SO2 53,3 → 42,2 351.2572 19 20.93 0.0 0.116 1.112 40.94 0.0 0.123 1.820 507 Low blend Irregular
Si34S 20 → 19 (v = 1) 351.2792 1217 31.53 0.0 0.116 1.047 11.52 0.0 0.121 0.338 623 High-mid blend Irregular
SO2 365,31 → 364,32 (ν2 = 1) 351.2900 1408 13.09 0.0 0.043 0.520 3.09 0.0 0.121 0.470 391 High blend −
SO2 144,10 → 143,11 351.8739 119 43.48 −3.5 0.203 2.601 33.28 0.0 0.189 2.900 724 Single Irregular
34SO2 214,18 → 213,19 352.0829 234 8.32 4.6 0.027 0.237 − − 0.009 − 420 Single Irregular
TiO 11 → 10 352.1576 222 9.98 −6.2 0.028 0.239 4.99 −1.2 0.036 0.173 260 Single Compact
SO2 3611,25 → 3710,28 352.6390 892 8.30 0.3 0.036 0.176 − − − − 405 Single Irregular
Si34S 20 → 19 (v = 0) 352.9739 161 43.13 0.1 0.407 8.012 36.49 −3.1 0.420 7.603 1000 Single Irregular
30Si18O 9 → 8 (v = 0) 353.6487 68 18.21 0.0 0.073 0.687 11.59 0.0 0.053 0.466 405 Single −
HCN 41 → 3−1 (ν2 = 1) 354.4605 1050 36.81 0.0 0.890 3.737 30.21 0.0 0.126 1.887 637 Low blend −
TiO2 1915,5 → 2014,6 354.4978 368 − − (2.691) − − − (5.032) − − Negligible blend* −
HCN 4 → 3 354.5055 26 52.25 0.0 3.274 78.754 52.25 0.0 5.565 149.783 1594 High blend −
29SiS 20 → 19 (v = 1) 354.5241 1224 − − (0.668) − − − (3.050) − − Negligible blend* −
SO2 465,41 → 464,42 (ν2 = 1) 354.6242 1801 6.60 −0.1 0.047 0.232 4.95 −1.8 0.110 0.359 492 Single Irregular
SO2 164,12 → 163,13 (ν2 = 1) 354.8000 894 6.46 0.0 (0.058) − 3.16 0.0 (0.115) − 507 Minor low blend Irregular
H2O 174,13 → 167,10 (ν2 = 0) 354.8086 5766 21.92 0.0 0.119 1.114 12.01 0.0 0.179 1.043 376 High blend Compact
SO2 124,8 → 123,9 355.0455 94 29.68 2.1 0.304 4.060 41.23 3.7 0.579 10.013 1304 Single Irregular
Na37Cl 28 → 27 356.1436 231 19.26 0.0 (0.033) − 12.68 0.0 (0.009) − 333 Uncertain, low Irregular
29SiS 20 → 19 (v = 0) 356.2424 163 40.89 0.0 0.764 17.049 50.76 0.0 1.503 33.802 1913 Low blend Irregular
HCN 4−1 → 31 (ν2 = 1) 356.2556 1050 28.93 0.0 (0.459) − 38.79 0.0 (0.894) − 2318 Minor high blend Core-halo
TiO2 334,30 → 333,31 356.7399 405 − − (0.099) − − − (0.424) − − Uncertain blend* −
SO2 104,6 → 103,7 356.7552 73 37.75 1.5 0.161 2.873 42.67 3.2 0.469 9.236 1739 Single except uncert. blend Irregular
SO2 53,3 → 42,2 (ν2 = 1) 357.0872 765 9.68 0.0 0.082 0.720 19.52 0.0 0.192 1.582 391 Low blend, uncert. Irregular
30Si34S 21 → 20 (v = 0) 357.0883 171 8.15 0.0 (0.082) − 31.10 0.0 (0.175) − 507 Minor high blend, uncert. Irregular
34SO2 200,20 → 191,19 357.1022 167 − − (0.081) − − − (0.070) − − Uncertain blend*, uncert. −
SO2 134,10 → 133,11 357.1654 106 29.51 3.2 0.297 3.574 45.90 13.0 0.523 10.242 1376 Single Irregular
SO2 154,12 → 153,13 357.2412 133 36.06 2.6 0.255 3.662 36.06 2.6 0.473 8.433 1072 Single Irregular
SO2 114,8 → 113,9 357.3876 83 31.13 4.0 0.261 3.160 34.40 −2.4 0.493 8.787 1492 Single Irregular
34SO2 465,41 → 464,42 357.5669 1052 8.34 0.0 0.109 1.009 14.89 0.0 0.443 3.694 3360 Low blend, uncert. Faint scatter
SO2 84,4 → 83,5 357.5814 55 32.65 0.0 0.203 2.907 39.20 0.0 0.443 9.338 884 Low-mid blend Irregular
SO2 200,20 → 191,19 (ν2 = 1) 357.6026 913 7.13 0.0 0.126 1.255 10.41 0.0 0.306 2.742 492 High-mid blend Irregular
SiS 20 → 19 (v = 3) 357.6060 3356 1.43 0.0 (0.073) − 4.70 0.0 (0.121) − 376 Minor high blend −
SO2 94,6 → 93,7 357.6718 63 24.56 9.0 0.234 2.574 39.29 0.8 0.440 8.430 1202 Single Irregular
Si33S 20 → 19 (v = 0) 357.7829 163 24.55 2.0 0.080 1.308 24.55 −4.4 0.260 2.505 695 Single Irregular
SO2 74,4 → 73,5 357.8924 48 33.35 0.0 0.157 2.379 33.35 0.0 0.441 8.396 1333 Low blend Irregular
SO2 64,2 → 63,3 357.9260 41 37.28 0.0 0.154 2.578 − − 0.303 − 927 Low-mid blend Irregular
SO2 174,14 → 173,15 357.9629 163 35.05 0.0 0.330 4.324 35.05 0.0 0.558 9.167 1579 High blend Irregular
SO2 54,2 → 53,3 358.0131 36 13.08 −3.3 0.094 1.066 63.78 −18.0 0.264 7.256 855 Single Irregular
SO2 200,20 → 191,19 358.2156 168 37.59 −2.7 0.583 8.991 39.23 5.4 1.046 20.025 1724 Single Irregular
SO2 253,23 → 252,24 359.1512 304 19.56 2.0 0.279 2.710 19.56 2.0 0.290 3.119 492 Single −
SiS 20 → 19 (v = 2) 359.3732 2300 8.15 2.5 0.098 0.775 4.89 −0.6 0.120 0.920 449 Single −
SO2 194,16 → 193,17 359.7707 197 26.04 2.5 0.406 4.737 30.92 −2.2 0.514 7.096 768 Single Irregular
SO2 345,29 → 344,30 360.2904 595 14.63 1.2 0.215 2.018 17.88 4.4 0.223 1.955 637 Single −
Si18O 9 → 8 (v = 1) 360.6680 1776 12.99 −2.6 (0.065) − 9.74 −2.6 (0.030) − 507 Uncertain Irregular
SO2 208,12 → 217,15 360.7218 333 8.12 0.7 (0.045) − − − (0.009) − 652 Uncertain Irregular
SiS 20 → 19 (v = 1) 361.1403 1236 24.32 4.8 0.371 4.225 32.43 −9.7 0.446 4.867 681 Single Irregular

Notes. The asterisks in the penultimate column denote if no fiducial measurements could be made. (a) Values for the velocity width, velocity asymmetry, and angular width are given only in the case of clear detections. (b) Values for the integrated flux are given only for non-blended lines or lines with a minor blend contribution. Peak-flux values are listed for all detected species, but might not reflect the real peak flux in the case of strongly overlapping blends. In the latter case, the values are put in parentheses. (c) Comments based on appearance of line in the spectrum for the 320 mas extraction aperture. “Single” denotes that the detected line is not blended. “Low/high blend” means that there is contamination on the low/high velocity side of a line “Mid blend” means that a line has a blend on both sides. “Minor” means that the line is a minor contributor. “Hyper” indicates that a line is part of a hyperfine structure line. “Uncertain” reflects that the line identification is unsure. (d) Comments based on the morphology of the zero-moment map. “Compact” means that the emission is not significantly different from the beam shape and the edge contours are closely spaced, suggesting that the emission is unresolved and the extent could be much smaller than the imaged extent. “–” means that the shape is fairly regular and that the edge contours are not very closely spaced. “Irregular” means that the emission appears irregular and that there are often additional faint clumps outside the measured contour. Hence, the measured extent might be a lower limit. “Arc-off” means that the transition is concentrated on one side of the stellar position. “Resolved out” is emission which can be measured to the maximum extent sampled and appears to have strong artefacts further out, i.e. the measured extent is an underestimate of the true extent. “Faint scatter” is emission from clumps scattered around. In these latter two cases the angular width is measured from the azimuthally averaged emission. “Core-halo” means that, in the case of two high-excitation lines, they have a compact peak but a (surprisingly) large total extent. “Arc” means that an arc-like feature is detected in the channel map, the direction of which is given. “S”: south, “E”: east, “SW”: south-west, “NW”: north-west, “SE”: south-east.

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