Top panel: total intensity, linear polarization intensity; bottom panel: degree of linear polarization at 86 GHz obtained by the slice transverse to the core and calculated by the pixel values in the image plane (negative core separation toward west; see Fig. 7). The solid black line indicates the position of the total intensity peak. The shaded area marks the measurement errors, assuming 30% uncertainty in the flux density measurements at 86 GHz (see Table 4). Only linear polarization higher than 24 mJy beam⁻¹ is shown.