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Table 1.
Details on the origin of the low-J CO spectra used in this study.
| Source | CO J = 1–0 | CO J = 2–1 |
|---|---|---|
| IRAS 07134+1005 | Bujarrabal et al. (1992)(a) | |
| IRAS 19500–1709 | Bujarrabal (priv. comm.) (a) | |
| IRAS 21282+5050 | Castro-Carrizo et al. (2010)(a,b) | |
| IRAS 22272+5435 | Bujarrabal (priv. comm.) (a) | |
| M 1–92 | New 30m data | |
| M 2–56 | Bujarrabal (priv. comm.) (a) | |
| OH 17.7–2.0 | Sánchez Contreras et al. (2007)(c) | Heske et al. (1990)(a) |
| R Sct | Bujarrabal (priv. comm.) (a) | |
| 89 Her | Bujarrabal (priv. comm.) (a) | |
| NGC 6537 | New 30m data | |
| M 1–16 | New 30m data | |
| M 1–17 | New 30m data | |
| M 3–28 | New 30m data | |
| NGC 2346 | Bachiller et al. (1989)(a) | |
| NGC 6072 | Cox et al. (1992)(d) | |
| NGC 6720 | Bachiller et al. (1989)(a) | |
| NGC 6781 | Bachiller et al. (1993)(a) | |
| NGC 7293 | Zack & Ziurys (2013)(e) | Young et al. (1999)(f) |
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