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Table 4
Unidentified emission features.
| Frequency |  |
FWHM | δv | Remarks |
|---|---|---|---|---|
| (MHz) | (mK) | (km s−1) | (km s−1) | |
| 173 514 | 56 | 7.4 | 1.1 | |
| 189 362 | 10 | 13.2 | 2.9 | |
| 204 008 | 9 | 8.2 | 2.7 | |
| 225 998 | 10 | 11.1 | 2.4 | |
| 267 993 | 16 | 5.1 | 2.0 | |
| 273 284 | 61 | 7.6 | 1.1 | |
| 280 051 | 14 | 5.0 | 1.6 | |
| 283 535 | 13 | 9.3 | 1.9 | |
| 295 629 | 25 | 9.0 | 1.9 | |
| 297 404 | 17 | 16.0 | 1.8 | Also seen to- wards IK Tau. TiN only tentative candidate. |
| 298 464 | 16 | 7.5 | 1.8 | |
| 309 449 | 13 | 3.9 | 1.4 | |
| 319 253 | 10 | 8.0 | 1.8 | |
| 320 204 | 46 | 7.8 | 0.9 | |
| 332 217 | 42 | 6.3 | 0.9 | |
| 354 195 | 1600 | –† | 0.5 | Maser. H2SiO? See Sect. 3.4.1. |
Notes. The listed frequency, peak temperature, and FWHM are obtained from fitting a Gaussian line profile at the velocity resolution δv – see Fig. 19. (†) We do not fit a Gaussian line profile to this emission feature.
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