Comparison of the Stokes I emission, magnetic field segments, and polarized intensity P of G31 at different wavelengths and angular resolution. Top panels: magnetic field segments (red) overlaid on the Stokes I (contours) at (left) 879 µm observed with the SMA and a synthesized beam of 1″.34×0″.83 by Girart et al. (2009), (middle) 1.3 mm with ALMA and a synthesized beam of 0″.28×0″.20 by Beltrán et al. (2019), and (right) 1.3 mm with ALMA and a synthesized beam of 0″.072×0″.064 (this work). Contours levels are −0.8%, 0.8%, 1.5%, 2.5%, 4% and 6% to 96% in steps of 10% of the peak intensity, which is 9.13 Jy beam⁻¹ (left), −5, 5, 10, 15, 40, 160, and 300 times σ, where 1σ is 1.2 mJy beam⁻¹ (middle), and −5, 5, 10, 30, 60, 120, 160, and 200 times σ, where 1σ is 0.15 mJy beam⁻¹ (right). The synthesized beams are shown in the lower left corner. Black dots mark the position of four embedded continuum sources (Beltrán et al. 2021). Bottom panels: contour map of the Stokes I emission superposed on the color image of the polarized flux intensity P.