Small-scale localized structures in sub-alfvenic regions of solar wind

Starting from encounter 22, Parker Solar Probe is on orbits having the closest approach to the sun (perihelion of 9.9 Rs). We examine the encounter 22, the period from 22nd to 27th December 2024, during which there is roughly three continuous days of sub-alfvenic solar wind. Two heliospheric current sheet crossings are identified. A particular region of interest is also the region of strong fluctuations in the plasma parameters on the 24th of December, when the spacecraft is close to the perihelion. We study the dynamics of the solar wind and the formation of localized structures, such as switchbacks, current sheets, and magnetic flux ropes. We compare these to similar structures that form during periods of Aflvenic solar wind. This allows us to conclude on potential generation mechanisms of different localized structures.