Current-sheet-like structures in different type of solar winds and their effects on the solar wind MHD turbulence

Current-sheet-like structures are ubiquitous in the solar wind. It is an important component of solar wind MHD turbulence intermittency. In this work, we examine the effect of current sheet of the solar wind MHD turbulence by analyzing the power spectrum, cross-helicity, residual energy, and structure function etc in different periods of the solar wind that is characterized by the occurrence rate of current sheets. Our study is performed to different types of solar wind according to the O7+/O6+ ratio and entropy. Earlier works have shown that O7+/O6+ ratio and the proton specific entropy can be used to identify the solar wind type. Our results show that the presence of current sheets can affect the solar wind MHD turbulence in both coronal hole wind and streamer stalking wind. We also present a case study in which a group of current sheets are found to bound a delta-shape like magnetic structure. Our analysis suggests that it may be due to a reconnection at the solar surface and then convected out with the solar wind.