Zoomed-in view of black rectangle shown in Fig. 2. Panel a: bsens continuum map at 3 mm. The orange contours show the H41α line emission (see Galván-Madrid et al. 2024) with levels of 1, 5, 20, 30, 40, 50, and 100σ (1σ = 0.01 Jy beam⁻¹). The green contours are the Ne II line emission with the labels of Beilis et al. (2022). The contour levels are 1, 2, 5, 10, 15, 20, and 25σ (1σ = 0.002 erg s⁻¹ cm⁻² sr⁻¹). Panel b: yellow and orange contours, on top of the bsens continuum map at 1.3 mm, show the H41α line emission with levels of, respectively, 1 and 5σ (1σ = 0.01 Jy beam⁻¹). The orange contours define the H II regions, labelled with numbers, and the yellow contours define the surroundings of these bubbles. The dashed pale green and dark green contours are the Ne II line emission, corresponding to contour levels of 1 and 5σ, respectively (1σ = 0.002 erg s⁻¹ cm⁻² sr⁻¹).