Table 1.
GMC positions.
Position | αICRS | δICRS | vLSR |
---|---|---|---|
[00h:47m:–s] | [−25°:17′:–″] | [km s−1] | |
GMC 1 | 31.93 | 29.00 | 304 |
GMC 2 | 32.36 | 18.80 | 330 |
GMC 3 | 32.81 | 21.55 | 286 |
GMC 4 | 32.97 | 19.97 | 252 |
GMC 5 | 33.16 | 17.30 | 231 |
GMC 6 | 33.33 | 15.70 | 180 |
GMC 7 | 33.65 | 13.10 | 174 |
GMC 8 | 33.94 | 10.90 | 205 |
GMC 9 | 34.14 | 12.00 | 201 |
GMC 10 | 34.24 | 7.84 | 144 |
Notes. GMC positions taken from Harada et al. (2024) except for GMCs 3, 4, and 10, which were obtained using CPROPS (Rosolowsky & Leroy 2006) on ALCHEMI data at 16 angular resolution. The local standard of rest (LSR) velocities were obtained by fitting a local thermodynamic equilibrium model (LTE) to the ALCHEMI spectra and averaging between the A– and E–CH3OH symmetry species (see Humire et al. (2022) for further information). The ALCHEMI spectral resolution of ∼8–9 km s−1 (see Subsect. 2.4) dominates the velocity uncertainty.
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