Observations of cross scale energy transfer in the inner heliosphere by Parker Solar Probe

Abstract

The solar wind, a continuous flow of plasma from the sun, not only shapes the near Earth space environment but also serves as a natural laboratory to study plasma turbulence in conditions that are not achievable in the lab. Starting with the Mariners, for more than five decades, multiple space missions have enabled in-depth studies of solar wind turbulence. Parker Solar Probe (PSP) was launched to explore the origins and evolution of the solar wind. With its state-of-the-art instrumentation and unprecedented close approaches to the sun, PSP is starting a new era of inner heliospheric exploration. In this review we discuss observations of turbulent energy flow across scales in the inner heliosphere as observed by PSP. After providing a quick theoretical overview and a quick recap of turbulence before PSP, we discuss in detail the observations of energy at various scales on its journey from the largest scales to the internal degrees of freedom of the plasma. We conclude with some open ended questions, many of which we hope that PSP will help answer.

Editorial : Reviews of Modern Plasma Physics: Volume 6

“…Topical collection "Nonlinear Processes in Solar-Terrestrial Plasmas (NLST)" is organized by Tohru Hada, Abraham Chian and Ryoji Matsumoto selected from SG and SA speakers in AAPPS-DPP2021 and published four articles in 2022 (Nariyuki 2022;Dominguez and Utz 2022;Chian et al 2022;Parashar and Matthaeus 2022).…”

Editorial to the Special Issue “Solar Wind Structures and Phenomena: Origins, Properties, Geoeffectiveness, and Prediction”

“…Solar wind is an open system with free energy transfer from the large to small scales. The study of solar wind structures and phenomena is the key to understanding solar, heliospheric, and solar-terrestrial physics [1][2][3][4]. The present Special Issue focuses on exploring certain aspects of these fundamental questions.…”