Maps of the two Stokes parameters for linear polarization, Q_d and U_d, the polarized intensity, P_d, the LoS-averaged polarization fraction, $p_{\text{d}}^{\text{los}}$, and the LoS-averaged polarization angle, ${\psi }_{\text{d}}^{\text{los}}$, of the dust emission at 353 GHz toward the G139 region. Left: observational maps from Planck. Middle: best-fit maps reconstructed with our seven clouds, ℂ₁, …, ℂ₇. Right: maps of the residuals obtained by subtracting the respective reconstructed maps from the observational Planck maps.