Table 1
Summary of the excitation temperatures (Tex) and column densities (Ntot) of the different tracers of hot corinos (CH3OH) and WCCC objects (CCH and C4H) derived in previous surveys obtained with single-dish telescope observations.
| Graninger et al. (2016) | Lindberg et al. (2016) | Higuchi et al. (2018) | L1527(b) | IRAS 16293-2422(c) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Object type | Molecule | Tex | Ntot | Tex | Ntot | Tex | Ntot | Tex | Ntot | Tex | Ntot |
| [K] | [ × 1013cm−2] | [K] | [ × 1013cm−2] | [K] | [ × 1013cm−2] | [K] | [ × 1013cm−2] | [K] | [ × 1013cm−2] | ||
| WCCC tracers | CCH | ... | ... | ... | ... | 8 − 21 | ≤52 | 8 ± 1 | 33 ± 3 | 18 ± 6 | 9 ± 6 |
| C4H | 7 − 15 | <4 | 7 − 16.5(a) | <1 | ... | ... | 12.3 | 20 ± 4 | 12.3 | 1.2 ± 0.3 | |
| Hot corino tracer | CH3OH | 4 − 7 | 0.2 − 11 | <123(a) | 0.2 − 95 | 8 − 21 | 0.5 − 16 | 8 ± 1 | 8 ± 1 | 84 ± 6 | 90 ± 10 |
| Resolution (au) | 4100–13 000 | 7800–8200 | 2400–4900 | 2400–4900 | 500–2000 | ||||||
Notes. (a) Excitation temperatures taken from c-C3 H2 and H2 CO APEX observationsfor C4H and CH3 OH respectively (Lindberg et al. 2016).
References. (b)Higuchi et al. (2018), Sakai et al. (2008). (c)Van Dishoeck et al. (1995), Sakai et al. (2009).
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