Magnetic field draping in the x − y plane in the analysed simulations. A) Photoionisation only. B) Photoionisation+electron ionisation. C) Photoionisation+charge exchange. D) All processes. The colour code shows the intensity of the magnetic field ranging from low (blue) to high intensity (red), with the same scale. The seed points for the field line tracing are shown as a horizontal dotted line along the x axis.