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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 1 . $ \overset{\prime \prime }{.} $6 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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