Thermal radio jet emission (grey shades) driven by HW2 (white star) compared with the spatial distribution of the NH₃ emission (red contours). Top: radio continuum emission at 1.3 cm (K band), obtained from the same NH₃ dataset, overplotted on the (5, 5) inversion line emission near the systemic velocity. Radio continuum levels start at 7 σ increasing by factors of 2 (1 σ of 5 μJy beam⁻¹). The dotted black line traces the mean jet axis at a position angle of 44° for comparison. Synthesized beams on the bottom left. Middle: In-band spectral index map (colours) measured from the K-band radio continuum (black contours, same as upper panel). Values according to the colour wedge to the right. Bottom: Similar to the upper panel but for the radio continuum emission at 3.6 cm (X band; see Appendix B) and a field of view two times smaller. Radio continuum levels start at 5 σ increasing at steps of 3 σ (1 σ of 36 μJy beam⁻¹).