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Understanding how the release of stored magnetic energy contributes to the generation of non-thermal high energy particles during solar flares is an important open problem in solar physics. Magnetic reconnection plays a fundamental role in…

太阳与恒星天体物理 · 物理学 2020-03-11 Alexei Borissov , Thomas Neukirch , Eduard Kontar , James Threlfall , Clare Parnell

The magnetic fields can change their topology through a process known as magnetic reconnection. This process in not only important for understanding the origin and evolution of the large-scale magnetic field, but is seen as a possibly…

高能天体物理现象 · 物理学 2015-05-27 Grzegorz Kowal , E. M. de Gouveia Dal Pino , A. Lazarian

The conversion of magnetic energy into other forms during solar flares is one of the outstanding open problems in solar physics. It is generally accepted that magnetic reconnection plays a crucial role in these conversion processes. To…

等离子体物理 · 物理学 2017-09-20 Alexei Borissov , Eduard P. Kontar , James Threlfall , Thomas Neukirch

3D Magnetohydrodynamic (MHD) resistive simulations have highlighted the significance of ubiquitous turbulence to drive fast reconnection. It has been demonstrated that particle acceleration via reconnection in 3D magnetized flows, where…

高能天体物理现象 · 物理学 2025-04-08 E. M. de Gouveia Dal Pino , J. C. Ramirez-Rodriguez , T. Medina-Torrejon , G. H. Vicentin , L. Passos Reis

The basic physics and recent progresses in theoretical and particle-in-cell (PIC) simulation studies of particle acceleration in multi-island magnetic reconnection are briefly reviewed. Particle acceleration in multi-island magnetic…

太阳与恒星天体物理 · 物理学 2020-01-08 H. Che , G. P. Zank

Particles are accelerated to very high, non-thermal energies during explosive energy-release phenomena in space, solar, and astrophysical plasma environments. While it has been established that magnetic reconnection plays an important role…

Understanding plasma dynamics and nonthermal particle acceleration in 3D magnetic reconnection has been a long-standing challenge. In this paper, we explore these problems by performing large-scale fully kinetic simulations of multi-xline…

太阳与恒星天体物理 · 物理学 2024-04-16 Qile Zhang , Fan Guo , William Daughton , Xiaocan Li , Hui Li

The role of MHD turbulence in the cosmic ray acceleration process in a volume with a reconnecting magnetic field is studied by means of Monte Carlo simulations. We performed modelling of proton acceleration with the 3D analytic model of…

天体物理学 · 物理学 2009-10-31 Tomasz Kobak , Michal Ostrowski

In solar flares and other astrophysical systems, a major challenge for solving particle acceleration problem associated with magnetic reconnection is the enormous scale separation between kinetic scales and observed reconnection scale.…

太阳与恒星天体物理 · 物理学 2018-10-08 Xiaocan Li , Fan Guo , Hui Li , Shengtai Li

Fast particles are accelerated in astrophysical environments by a variety of processes. Acceleration in reconnection sites has attracted the attention of researchers recently. In this letter we analyze the energy distribution evolution of…

高能天体物理现象 · 物理学 2015-06-04 Grzegorz Kowal , Elisabete M. de Gouveia Dal Pino , Alex Lazarian

We investigate particle acceleration in an MHD-scale system of multiple current sheets by performing 2D and 3D MHD simulations combined with a test particle simulation. The system is unstable for the tearing-mode instability, and magnetic…

空间物理 · 物理学 2022-08-16 M. Nakanotani , G. P. Zank , L. -L. Zhao

Magnetic reconnection has long been known to be the most important mechanism not only for mixing the plasmas by changing the magnetic field topology but also for releasing the magnetic field energy into the plasma kinetic energy. During…

高能天体物理现象 · 物理学 2024-04-25 Masahiro Hoshino

Magnetic reconnection is invoked as one of the primary mechanisms to produce energetic particles. We employ large-scale three-dimensional (3D) particle-in-cell simulations of reconnection in magnetically-dominated ($\sigma=10$) pair plasmas…

高能天体物理现象 · 物理学 2021-12-15 Hao Zhang , Lorenzo Sironi , Dimitrios Giannios

Magnetic reconnection is a ubiquitous process in astrophysical plasmas and an efficient mechanism for particle acceleration. Using 2.5D magnetohydrodynamic (MHD) simulations with a co-evolving fluid-particle framework, we investigate how…

等离子体物理 · 物理学 2026-01-01 Shimin Liang , Nianyu Yi

We analyze particle acceleration in explosive reconnection events in magnetically dominated proton-electron plasmas. Reconnection is driven by large-scale magnetic stresses in interacting current-carrying flux tubes. Our model relies on…

高能天体物理现象 · 物理学 2019-02-07 B. Ripperda , O. Porth , C. Xia , R. Keppens

Magnetic reconnection is thought to be the driver for many explosive phenomena in the universe. The energy release and particle acceleration during reconnection have been proposed as a mechanism for producing high-energy emissions and…

高能天体物理现象 · 物理学 2015-04-10 Fan Guo , Yi-Hsin Liu , William Daughton , Hui Li

The ubiquitous turbulence in astrophysical plasmas is important for both magnetic reconnection and reconnection acceleration. We study the particle acceleration during fast 3D turbulent reconnection with reconnection-driven turbulence.…

等离子体物理 · 物理学 2023-01-11 Siyao Xu , Alex Lazarian

The theoretical prediction that magnetic reconnection spontaneously drives turbulence has been supported by magnetohydrodynamic (MHD) and kinetic simulations. While reconnection with externally driven turbulence is accepted as an effective…

等离子体物理 · 物理学 2023-08-16 Jian-Fu Zhang , Siyao Xu , Alex Lazarian , Grzegorz Kowal

Magnetic Reconnection is an efficient and fast acceleration mechanism by means of direct electric field acceleration parallel to the magnetic field. Thus, acceleration of particles in reconnection regions is a very important topic in plasma…

天体物理学 · 物理学 2015-06-24 Rudiger Schopper , Guido T. Birk , Harald Lesch

While the exact acceleration mechanism of energetic particles during solar flares is (as yet) unknown, magnetic reconnection plays a key role both in the release of stored magnetic energy of the solar corona and the magnetic restructuring…

太阳与恒星天体物理 · 物理学 2015-01-21 J. Threlfall , T. Neukirch , C. E. Parnell , S. Eradat Oskoui
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