Maps of kinematic parameters. Left panel: bright component of centroid velocity map of C¹⁸O (2–1). Right panel: centroid velocity map only showing the weak component of the Gaussian fitting. The black vectors represent the polarization angles, tilted by 90 degrees. The star shows the position of the protostar. The contours represent N(H₂) column density levels, as derived from Herschel data: [1.0,1.5,2.0] × 10²² cm⁻².