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A broad variety of observational methods allows us to see the effect of magnetic reconnection in high-temperature strongly-magnetized plasma of the solar corona. Some specific features of the large-scale reconnection in large solar flares…

Solar and Stellar Astrophysics · Physics 2011-02-23 B. V. Somov , S. I. Bezrodnykh , L. S. Ledentsov

Reconnection of the self-generated magnetic fields in laser-plasma interaction was first investigated experimentally by Nilson {\it et al.} [Phys. Rev. Lett. 97, 255001 (2006)] by shining two laser pulses a distance apart on a solid target…

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…

Magnetic reconnection is a ubiquitous process in astrophysical plasmas, responsible for the explosive conversion of magnetic energy into thermal and kinetic energy. In extreme astrophysical systems, such as black hole coronae and neutron…

Plasma Physics · Physics 2024-10-15 Rishabh Datta

This work presents a 2.5-dimensional simulation study of the instability of current-sheets located in a medium with a strong density variation along the current layer. The initial force-free configuration is observed to undergo a two-stage…

Solar and Stellar Astrophysics · Physics 2015-05-13 Lapo Bettarini , Giovanni Lapenta

Null and X-points are not themselves directly important to magnetic reconnection because distinguishable field lines do not approach them closely. Even in a collision-free plasma, magnetic field lines that approach each other on a scale…

Plasma Physics · Physics 2020-01-08 Allen H. Boozer

We report on computer simulations and analytic theory to provide a self-consistent understanding of the role of the reconnection electric field, which extends substantially beyond the simple change of magnetic connections. Rather, we find…

It has recently been proposed (Loureiro & Boldyrev 2017; Mallet et al. 2017) that the inertial interval in magnetohydrodynamic (MHD) turbulence is terminated at small scales not by a Kolmogorov-like dissipation region, but rather by a new…

Plasma Physics · Physics 2017-12-13 N. F. Loureiro , S. Boldyrev

The properties of the turbulence which develops in the outflows of magnetic reconnection have been investigated using self-consistent plasma simulations, in three dimensions. As commonly observed in space plasmas, magnetic reconnection is…

The main subject of my talk is the question: in what kind of astrophysical systems magnetic reconnection is interesting and/or important? To address this question, I first put forward three general criteria for selecting the relevant…

Astrophysics · Physics 2007-05-23 Dmitri A. Uzdensky

Magnetic reconnection is a basic plasma process of dramatic rearrangement of magnetic topology, often leading to a violent release of magnetic energy. It is important in magnetic fusion and in space and solar physics --- areas that have so…

High Energy Astrophysical Phenomena · Physics 2015-05-27 Dmitri A. Uzdensky

We present auroral evidence for multiple and, most probably, small scale reconnection in the near Earth magnetospheric plasma sheet current layer during auroral activity. Hall currents as the source of upward and downward field-aligned…

Space Physics · Physics 2009-02-18 R. A. Treumann , C. H. Jaroschek , R. Pottelette

A prediction of the steady-state reconnection electric field in asymmetric reconnection is obtained by maximizing the reconnection rate as a function of the opening angle made by the upstream magnetic field on the weak magnetic field…

Plasma Physics · Physics 2018-06-13 Yi-Hsin Liu , M. Hesse , P. A. Cassak , M. A. Shay , S. Wang , L. -J. Chen

This work presents a magnetic reconnection experiment in which the kinetic, magnetic and thermal properties of the plasma each play an important role in the overall energy balance and structure of the generated reconnection layer. Magnetic…

This work presents a more detailed analysis of the process of magnetic reconnection as promising ion beam accelerator mechanism with possible applications in laboratory plasmas and, more importantly, in the plasma propulsion field. In a…

Plasma Physics · Physics 2018-08-15 Emanuele Cazzola , Davide Curreli , Giovanni Lapenta

We study magnetic reconnection events in a turbulent plasma within the two-fluid theory. By identifying the diffusive regions, we measure the reconnection rates as function of the conductivity and current sheet thickness. We have found that…

Plasma Physics · Physics 2017-03-06 Nicola Offeddu , Miller Mendoza

UV bursts and Ellerman bombs are transient brightenings observed in the low solar atmospheres of emerging flux regions. Observations have discovered the cospatial and cotemporal EBs and UV bursts, and their formation mechanisms are still…

Solar and Stellar Astrophysics · Physics 2021-02-17 Lei Ni , Yajie Chen , Hardi Peter , Hui Tian , Jun Lin

Fast reconnection of magnetic field in turbulent fluids allows magnetic field to change its topology and connections. As a result, the traditional concept of magnetic fields being frozen into the plasma is no longer applicable. The…

Astrophysics of Galaxies · Physics 2012-02-07 A. Lazarian

Fast reconnection operating in magnetically dominated plasmas is often invoked in models for magnetar giant flares, for magnetic dissipation in pulsar winds, or to explain the gamma-ray flares observed in the Crab nebula, hence its…

High Energy Astrophysical Phenomena · Physics 2016-07-27 L. Del Zanna , E. Papini , S. Landi , M. Bugli , N. Bucciantini

Magnetic reconnection, the rearrangement of magnetic field topology, is a fundamental physical process in magnetized plasma systems all over the universe1,2. Its process is difficult to be directly observed. Coronal structures, such as…

Solar and Stellar Astrophysics · Physics 2016-09-21 Leping Li , Jun Zhang , Hardi Peter , Eric Priest , Huadong Chen , Lijia Guo , Feng Chen , Duncan Mackay