Total radio intensity profiles of the merged radio maps in μJy/beam perpendicular to the major axis of NGC 4631. The measured points are averaged in strips of 150′′ width along the major axis. The x-axis of the plots give the distance from the major axis in [′′]. The upper panels refer to the northern part (i.e., above the major axis) and the lower panels to the southern part (i.e., below the major axis) of NGC 4631. The thick red lines represent the two-component exponential fit to the data at 4.85 GHz; the thin black lines in n1 and n2 represent the fit to the 8.35 GHz data.