Role of the variable solar wind in the dynamics of small-scale magnetosheath structures

Rakhmanova, L. S.; Рязанцева, М. О.; Zastenker, G. N.; Yermolaev, Yuri

doi:10.3389/fspas.2023.1121230

Cited by 8 publications

(1 citation statement)

References 99 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wang et al, 2022). Such far-reaching influences highlight the significance of the jets in the solar wind coupling with the magnetosphere and ionosphere of Earth (Plaschke et al, 2018;Rakhmanova et al, 2023). However, the extent of their impact remains uncertain, mainly due to our limited understanding of their structure, dimensions, and formation mechanisms (Plaschke et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Unveiling the 3D Structure of Magnetosheath Jets

Fatemi,

Hamrin,

Krämer

et al. 2023

Preprint

View full text Add to dashboard Cite

Magnetosheath jets represent localized enhancements in dynamic pressure observed within the magnetosheath. These energetic entities, carrying excess energy and momentum, can impact the magnetopause and disrupt the magnetosphere. Therefore, they play a vital role in coupling the solar wind and terrestrial magnetosphere. However, our understanding of the morphology and formation of these complex, transient events remains incomplete over two decades after their initial observation. Previous studies have relied on oversimplified assumptions, considering jets as elongated cylinders with dimensions ranging from 0.1 RE to 5.0 RE (Earth radii). In this study, we present simulation results obtained from Amitis, a high-performance hybrid-kinetic plasma framework (particle ions and fluid electrons) running in parallel on Graphics Processing Units (GPUs) for fast and more environmentally friendly computation compared to CPU-based models. Considering realistic scales, we present the first global, three-dimensional (3D in both configuration and velocity spaces) hybrid-kinetic simulation results of the interaction between solar wind plasma and Earth. Our high-resolution kinetic simulations reveal the 3D structure of magnetosheath jets, showing that jets are far from being simple cylinders. Instead, they exhibit intricate and highly interconnected structures with dynamic 3D characteristics. As they move through the magnetosheath, they wrinkle, fold, merge, and split in complex ways before a subset reaches the magnetopause.

show abstract

Section: Introductionmentioning

confidence: 99%

Unveiling the 3D Structure of Magnetosheath Jets

Fatemi,

Hamrin,

Krämer

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

Impact of solar-wind turbulence on a planetary bow shock

Behar,

Pucci,

Simon Wedlund

et al. 2024

A&A

View full text Add to dashboard Cite

The interaction of the solar-wind plasma with a magnetized planet generates a bow-shaped shock ahead of the wind. Over recent decades, near-Earth spacecraft observations have provided insights into the physics of the bow shock, and the findings suggest that solar-wind intrinsic turbulence influences the bow shock dynamics. On the other hand, theoretical studies, primarily based on global numerical simulations, have not yet investigated the global three-dimensional (3D) interaction between a turbulent solar wind and a planetary magnetosphere. This paper addresses this gap for the first time by presenting an investigation of the global dynamics of this interaction that provides new perspectives on the underlying physical processes. We use the newly developed numerical code Menura to examine how the turbulent nature of the solar wind influences the 3D structure and dynamics of magnetized planetary environments, such as those of Mercury, Earth, and magnetized Earth-like exoplanets. We used the hybrid particle-in-cell (PIC) code Menura to conduct 3D simulations of the turbulent solar wind and its interaction with an Earth-like magnetized planet through global numerical simulations of the magnetosphere and its surroundings. Menura runs in parallel on graphics processing units (GPUs), enabling efficient and self-consistent modeling of turbulence. By comparison with a case in which the solar wind is laminar, we show that solar-wind turbulence globally influences the shape and dynamics of the bow shock, the magnetosheath structures, and the ion foreshock dynamics. Also, a turbulent solar wind disrupts the coherence of foreshock fluctuations, induces large fluctuations on the quasi-perpendicular surface of the bow shock, facilitates the formation of bubble-like structures near the nose of the bow shock, and modifies the properties of the magnetosheath region. The turbulent nature of the solar wind impacts the 3D shape and dynamics of the bow shock, magnetosheath, and ion foreshock region. This influence should be taken into account when studying solar-wind--planet interactions in both observations and simulations. We discuss the relevance of our findings for current and future missions launched into the heliosphere.

show abstract

Unveiling the 3D structure of magnetosheath jets

Fatemi,

Hamrin,

Krämer

et al. 2024

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

Magnetosheath jets represent localized enhancements in dynamic pressure observed within the magnetosheath. These energetic entities, carrying excess energy and momentum, can impact the magnetopause and disrupt the magnetosphere. Therefore, they play a vital role in coupling the solar wind and terrestrial magnetosphere. However, our understanding of the morphology and formation of these complex, transient events remains incomplete over two decades after their initial observation. Previous studies have relied on oversimplified assumptions, considering jets as elongated cylinders with dimensions ranging from $0.1\, R_{\rm E}$ to $5\, R_{\rm E}$ (Earth radii). In this study, we present simulation results obtained from Amitis, a high-performance hybrid-kinetic plasma framework (particle ions and fluid electrons) running in parallel on graphics processing units (GPUs) for fast and more environmentally friendly computation compared to CPU-based models. Considering realistic scales, we present the first global, three-dimensional (3D in both configuration and velocity spaces) hybrid-kinetic simulation results of the interaction between solar wind plasma and the Earth. Our high-resolution kinetic simulations reveal the 3D structure of magnetosheath jets, showing that jets are far from being simple cylinders. Instead, they exhibit intricate and highly interconnected structures with dynamic 3D characteristics. As they move through the magnetosheath, they wrinkle, fold, merge, and split in complex ways before a subset reaches the magnetopause.

show abstract

Role of the variable solar wind in the dynamics of small-scale magnetosheath structures

Cited by 8 publications

References 99 publications

Unveiling the 3D Structure of Magnetosheath Jets

Unveiling the 3D Structure of Magnetosheath Jets

Impact of solar-wind turbulence on a planetary bow shock

Unveiling the 3D structure of magnetosheath jets

Contact Info

Product

Resources

About