Modelled (left) and observed (right panel, by Tafoya et al. 2004) radio-continuum maps for 1.3 cm (top) and 7 mm (bottom). Contours are − 5, − 4, 4, 5, 6, 8, 10, 12, 14, 16, 20, 25, 30, 35, 40, 50, 60, 70, 80, 90, 100, and 110 times the rms of the observational VLA image (727 and 859 μJy beam^-1 for the 1.3 cm and 7 mm images, respectively). The modelled maps were obtained by the convolution of the original data with a box of the same size as the HPBW of the observations) and rotating the image by 8° anticlockwise.