3D PFSS rendering of the magnetic field lines of streamer and pseudostreamer configurations. Top left panel: solar magnetogram on disk with open magnetic field lines obtained via 3D PFSS modeling and R_SS = 2.0 R_⊙ on 14 July 2020 18:04 UT using SDO/HMI data. The PFSS reconstructed magnetic field helmet streamer configuration is shown as it appears on the limb (corresponds to the map in Fig. 11a, the PFSS model was made along the 161 degree Carrington Longitude). Top right panel: 3D PFSS model for the pseudostreamer rotated to the limb view – an area of the origin of Alfvénic slow solar wind observed at Solar Orbiter on 17 July 2020 (corresponds to the map in Fig. 11d). White arrows point to the regions of the Solar Orbiter magnetic footpoints. Bottom panel: magnetic pressure map with locations of cuts along which the top panel 3D PFSS models were constructed. The blue cut corresponds to the top left, and the red cut to the top right model.