Herschel column density map of the B59 and Stem in the Pipe complex, as presented in Fig. 1. The red segments provide the direction of the local magnetic field as measured from near-infrared dust polarization data (Franco et al. 2010). The blue segments mark a  ± 2σ deviation on either side of the nominal field direction. Note that gravitationally unstable regions, those lying above N_H2 ≃ 7 × 10²¹ cm^-2, correspond to the white areas.