Vertical profiles of the non-thermal radio continuum emission at 144 MHz in strips at various offsets along the major axis (panels a–e) and the position of the strips (panel f). Red solid lines show Gaussian model fits to the data, and purple solid lines show the Gaussian synthesised beam (FWHM = 20 arcsec). Vertical tick marks are at 2.5×, 5×, and 7.5× the next labelled tick value below. In the profiles, south is to the left and north is to the right; 1 arcsec corresponds to 57 pc at the distance of NGC 4565.