Table 1.
Studies.
| Transition | Spatial | Average spatial | Instrument | Study |
|---|---|---|---|---|
| resolution | resolution (pc) | |||
| HCN | ||||
| HCN(1−0) | 0.7″ × 0.5″ (49 pc × 35 pc) | 42 | ALMA Band 3 | 1 |
| HCN(1−0) | 2″ × 0.8″ (140 pc × 56 pc) | 98 | PdBI | 2 |
| HCN(4−3) | 0.6″ × 0.5″ (42 pc × 35 pc) | 39 | ALMA Band 7 | 3, 4 |
| HCN(4−3) | 14″ | 980 | JCMT 15 m | 5 |
| HCN(4−3) | 14″ | 980 | JCMT 15 m | 6 |
| HCO+ | ||||
| HCO+(1−0) | 0.7″ × 0.5″ (49 pc × 35 pc) | 42 | ALMA Band 3 | 1 |
| HCO+(1−0) | 2″ × 0.8″ (140 pc × 56 pc) | 98 | PdBI | 2 |
| HCO+(4−3) | 0.6″ × 0.5″ (42 pc × 35 pc) | 39 | ALMA Band 7 | 3, 4 |
| HCO+(4−3) | 14″ | 980 | JCMT 15 m | 5 |
| HCO+(4−3) | 14″ | 980 | JCMT 15 m | 6 |
| CS | ||||
| CS(2−1) | 0.75″ × 0.51″ (∼53 pc × ∼36 pc) | ∼44 | ALMA Band 3 | 7 |
| CS(2−1) | 4.2″ × 2.4″ (294 pc × 168 pc) | 231 | ALMA Band 3 | 8 |
| CS(2−1) | 6.6″ × 3.2″ (464 pc × 224 pc) | 343 | ALMA Band 3 | 9 |
| CS(7−6) | 0.6″ × 0.5″ (42 pc × 35 pc) | 39 | ALMA Band 7 | 3, 4, 7 |
| CS(7−6) | 4.2″ × 2.4″ (294 pc × 168 pc) | 231 | ALMA Band 7 | 10 |
| CS(7−6) | 14″ | 980 | JCMT 15 m | 11 |
References. 1) This study/Sánchez-García et al. (2022), 2) García-Burillo et al. (2008), 3) García-Burillo et al. (2014), 4) Viti et al. (2014), 5) Pérez-Beaupuits et al. (2009), 6) Tan et al. (2018), 7) Scourfield et al. (2020), 8) Takano et al. (2014), 9) Tacconi et al. (1997), 10) Nakajima et al. (2015), 11) Bayet et al. (2009).
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