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Table 1
ALMA band 7 observational parameters and sulphur monoxide transitions for HD 100546.
| Date observed | 18th November 2012 | ||||
|---|---|---|---|---|---|
| Base lines | 21-375m | ||||
| Weighting | natural | ||||
| SO rotational transitions | 77–66 | 78–67 | 88–77 | 32–12 | 77–66 + 78–67 |
| Rest frequency (GHz) | 301.286 | 304.078 | 344.311 | 345.704 | – |
| Synthesised beam | 1.′′1 × 0.′′6 | 1.′′1 × 0.′′6 | 1.′′0 × 0.′′5 | 1.′′0 × 0.′′5 | 1.′′1 × 0.′′6 |
| Beam PA | 24∘ | 23∘ | 40∘ | 40∘ | 24∘ |
| Spectral resolution (km s−1) | 0.24 | 0.24 | 0.21 | 0.21 | 1.00 |
| rms noise (mJy beam−1 channel−1) | 10.9 | 9.9 | 17.4 | 16.2 | 4.2 |
| Peak emission (mJy beam−1) | – | – | – | – | 24.7 |
| Eu (K) | 71.0 | 62.1 | 87.5 | 21.1 | – |
| Einstein A coefficient (s−1) | 3.429e–04 | 3.609e–04 | 5.186e–04 | 1.390e–07 | – |
Notes. Thevalues for the line frequencies and Einstein A coefficients are from the Cologne Database for Molecular Spectroscopy (CDMS; Müller et al. 2001) as listed in the Leiden Atomic and Molecular Database (LAMDA; Schöier et al. 2005).
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