Multi-wavelength images of XS55. Left: COSMOS-XS 3 GHz map (van der Vlugt et al. 2021) overlaid with 2, 3σ 0.5 − 7 keV contours from Chandra, smoothed with a 1″ Gaussian, in purple. Middle: JWST colour image of XS55 representing F115W+F105W, F277W, and F444W as blue, green, and red channels, respectively. Overlaid are ALMA 3 mm continuum emission contours at 5, 8, and 11σ, with the beam size shown as a white ellipse. Right: Moment-1 map of CO(5-4) masked at 3σ in moment-0, overlaid with integrated CO(5-4) at 3, 4, and 5σ levels and JWST/F444W contours at 5, 8, and 11σ levels in yellow and black, respectively.