Table 2.
Peak intensities of ALMA spectra (extracted from the ALMA data centred on the star from apertures with diameters corresponding to ≈10% of the shell diameter) and single-dish observations of CO towards the detached-shell sources.
| Telescope | 12CO (1 − 0) | 12CO (2 − 1) | 12CO (3 − 2) | 12CO (4 − 3) | |
|---|---|---|---|---|---|
| U Ant | ALMA | 142 | |||
| SEST | 0.48 | 0.89 | 0.93 | ||
| R Scl | Not modelled in this paper | ||||
| V644 Sco | ALMA | 12.6 | |||
| SEST | 0.19 | 0.75 | |||
| APEX | 1.2 | 1.25 | |||
| S Sct | ALMA | 25 | |||
| SEST | 0.87 | 0.64 | 0.16 | ||
| APEX | 0.3 | 0.02 | |||
| DR Ser | ALMA | 14 | |||
| APEX | 0.41 | 0.28 | |||
| Beam | SEST | 44″ (0.75) | 23″ (0.50) | 15″ (0.25) | |
| APEX | 17″ (0.79) | 13″ (0.58) | |||
Notes. Intensities are in mJy for the ALMA spectra and in K (main-beam temperature, Tmb) for the single-dish spectra. SEST observations are taken from Schöier et al. (2005) and references therein. The APEX observations are new. We assume an uncertainty of 20% in the peak intensities. The full width half maximum of the telescope beams are given for the respective transitions in the last two rows, with the main-beam efficiencies in parentheses.
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