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Fig. 4


Relative orientation parameter ξ, defined in Eq. (3), calculated for the different NH bins towards the South-Nest, South-Ridge, Centre-Nest, and Centre-Ridge sub-regions of Vela C. The blue, green, and red curves correspond to the analysis of the BLASTPol observations at 250, 350, and 500 μm, respectively. The values ξ> 0 and ξ< 0 correspond to the magnetic field being oriented mostly parallel or perpendicular to the iso-NH contours, respectively. The black dashed line and the values of CHRO and XHRO correspond to the linear fit introduced in Eq. (5). The grey line is ξ = 0, which corresponds to the case where there is no preferred relative orientation.

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