Comparison between the observed radio emission maps taken from (Benaglia et al. 2010; top panel) and our synthetic maps (bottom panel). Top right panel: synthesised beam of 12 arcsec × 12 arcsec is shown (i.e. σ_x = σ_y = 12 arcsec). Left and right panels: observing frequency of 1.42 GHz and 4.86 GHz, respectively. The rms levels of the observed maps are 0.3 mJy beam⁻¹ (left panels) and 0.2 mJy beam⁻¹ (right panels). The black solid contours of the 1.42 GHz maps are at 0.9,1.8, 3.0, and 4.5 mJy beam⁻¹, the red dotted contour is at 0.3 mJy beam⁻¹ (the observed map rms), and the green contour is at 6 mJy beam⁻¹ (above the observed values). In the 4.86 GHz maps, the black contours are at 0.6, 1.2, 2.0, and 3.0 mJy beam⁻¹, and the red dotted is at 0.2 mJy beam⁻¹ (the observed map rms). A projection factor cos (Dec) was used for the x-coordinates in the synthetic map in order to relate the synthetic map units to sky positions.