The column density map of the filament in B59 (from Herschel data) overlaid with the polarization segments from Pico dos Dias Observatory. The blue rectangles divide the filament into three regions labeled R1, R2, and R3. The red dashed lines represent the axis of each region. Contours show column density of H₂ with levels: [4, 6] × 10²² cm². The scale bar is on the top right side of the panel.