Si ¹⁶O(v=1, J=6−5) line emission. Left: Doppler velocity spectra integrated over a square of 2 × 2 arcsec² centred at the origin. Right: Channel maps (Jy beam⁻¹ ) of the 2023 A-configuration observations between V_z= −2.5 and −1 km s⁻¹ (values of V_lsr are indicated in the upper-left corner of each panel). The contours are at 3, 6, 15, 30, 60, 150, and 300 times the noise level (see Table 1).