Paα emission line map after extraction based on the PV diagram (Fig. 2, see text). The 2σ, 3σ, and 4σ contours are shown in cyan. The black contours show the bright nucleus of GN20 detected in the F560W image (Colina et al. 2023). The MRS point spread function at 9.47 μm is displayed as a gray ellipse. The PSF is slightly asymmetric and the size shows the FWHM in the α (x) and β (y) direction, rotated according to the observed position angle. The four clumps discussed in Sect. 3.4 are annotated.