Integrated intensity (moment-0) maps of (a) HCN J = 1–0 and (b) HCO⁺J = 1–0 lines towards the central ±2″. Both moment-0 images use the same colour scaling from 0 to 1.50 Jy beam⁻¹ km s⁻¹ and the same contour levels in steps of 4σ, where σ = 8.8 × 10⁻² Jy beam⁻¹ km s⁻¹. The peak intensity is 1.50 and 0.87 Jy beam⁻¹ km s⁻¹ for HCN and HCO⁺, respectively. Intensity-weighted velocity (moment-1) maps of (c) HCN J=1–0 and (d) HCO⁺J = 1–0 lines towards the central ±2″, with the same color scaling from −800 to +800 km s⁻¹ in relative velocity with respect to V_sys. All maps are restored with a circular Gaussian beam of , which is the typical minor-axis size of the synthesised beam. The position offsets are measured from RA(J2000) = 12^h19^m23.​​^s220 and Dec(J2000) = 05°49′30775.