StokesI (left panel), polarized intensity (middle panel), and polarization fraction (right panel) of our Band 3 (upper panels), Band 6 (middle panels), and Band 7 (lower panels) ALMA data. The contours indicate the intensity levels of the Stokes I emission in each band, being 30, 60, 90, 120, 150, and 180 times the rms for bands of 3 and 6 (rms_Band 3 ~ 0.012 mJy beam⁻¹ and rms_Band 6 ~ 0.15 mJy beam⁻¹), and 30, 60, 90, 120 times 0.52 mJy beam⁻¹, the rms for Band 7. The synthesized beams are 0.22′′ × 0.17′′ (position angle = −61.46°) for Band 3, 0.26′′ × 0.15′′ (position angle = −85.65°) for Band 6 and 0.21′′ × 0.18′′ (position angle = −72.79°) for Band 7. The vector map indicates the orientation of the polarization whose length is proportional to the polarization fraction. The vectors are sampled as one vector every two pixels. The two star symbols in the middle-lower panel indicate the position of the two continuum peaks detected in the 34 GHz VLA data, VLA 5a for the northern peak and VLA 5b for the southern one (see also Fig. 2).