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We investigate the large scale evolution of a relativistic magnetic reconnection in an electron-positron pair plasma by a relativistic two-fluid magnetohydrodynamic (MHD) code. We introduce an inter-species friction force as an effective…

High Energy Astrophysical Phenomena · Physics 2014-11-18 Seiji Zenitani , Michael Hesse , Alex Klimas

Recent numerical simulations of magnetic reconnection in two dimensions have shown that, when the resistivity is strongly localized, the reconnection region develops a Petschek-like structure, with the width of the inner diffusion region…

Astrophysics · Physics 2009-11-07 Dmitri A. Uzdensky

Using a recently developed analytical procedure, we determine the rate of magnetic reconnection in the "standard" model of eruptive solar flares. During the late phase, the neutral line is located near the lower tip of the reconnection…

Solar and Stellar Astrophysics · Physics 2018-05-23 Terry G. Forbes , Daniel B. Seaton , Katharine K. Reeves

Magnetic reconnection in an antiparallel uniform Harris current sheet equilibrium, which is initially perturbed by a region of enhanced resistivity limited in all three dimensions, is investigated through compressible magnetohydrodynamic…

Astrophysics · Physics 2009-10-31 Joerg Schumacher , Bernhard Kliem , Norbert Seehafer

We use extensive 3D resistive MHD simulations to study how large-scale current sheets will undergo fast reconnection in the high Lundquist number $S$ limit (above $\sim 10^4$), when the system is subject to different externally driven…

Solar and Stellar Astrophysics · Physics 2022-04-06 Yang Liping , Li Hui , Guo Fan , Li Xiaocan , Li Shengtai , He jiansen , Zhang Lei , Feng Xueshang

The reconnection rate is obtained for the simplest case of 2D symmetric reconnection in an incompressible plasma. In the short note (Erkaev et al., Phys. Rev. Lett.,84, 1455 (2000)), the reconnection rate is found by matching the outer…

Plasma Physics · Physics 2009-11-07 Nikolai V. Erkaev , Vladimir S. Semenov , Ilya V. Alexeev , Helfried K. Biernat

We consider the phenomenon of magnetic reconnection, namely a change in the topology of magnetic lines, for sufficiently regular solutions of the three-dimensional periodic magnetohydrodynamic (MHD) equations. We provide examples where…

Analysis of PDEs · Mathematics 2025-10-21 Gennaro Ciampa , Renato Lucà

Magnetic reconnection drives a wide range of astrophysical plasma phenomena, including solar flares, by converting magnetic energy into plasma energy through changes in magnetic field topology. Petschek reconnection is a magnetohydrodynamic…

Solar and Stellar Astrophysics · Physics 2026-04-01 Keita Akutagawa , Shinsuke Imada , Munehito Shoda

We present a constructive numerical example of fast magnetic reconnection in a three dimensional periodic box. Reconnection is initiated by a strong, localized perturbation to the field lines. The solution is intrinsically three…

Plasma Physics · Physics 2015-05-18 Bijia Pang , Ue-Li Pen , Ethan T. Vishniac

In this paper we present a two-dimensional, time dependent, numerical simulation of a reconnection current layer in incompressible resistive magnetohydrodynamics with uniform resistivity in the limit of very large Lundquist numbers. We use…

Astrophysics · Physics 2009-10-31 Dmitri A. Uzdensky , Russell M. Kulsrud

Relativistic magnetic reconnection is one of the most fundamental mechanisms considered responsible for the acceleration of relativistic particles in astrophysical jets and magnetospheres of compact objects. Understanding the properties of…

High Energy Astrophysical Phenomena · Physics 2025-01-22 M. Bugli , E. F. Lopresti , E. Figueiredo , A. Mignone , B. Cerutti , G. Mattia , L. Del Zanna , G. Bodo , V. Berta

We present particle-in-cell simulations of collisionless magnetic reconnection in a system (like the magnetopause) with a large density asymmetry across the current layer. In the presence of an ambient component of the magnetic field…

Space Physics · Physics 2015-06-26 M. Swisdak , B. N. Rogers , J. F. Drake , M. A. Shay

In this paper quasi-stationary, two-and-a-half-dimensional magnetic reconnection is studied in the framework of incompressible resistive magnetohydrodynamics (MHD). A new theoretical approach for calculation of the reconnection rate is…

Astrophysics · Physics 2009-11-23 Leonid M. Malyshkin , Timur Linde , Russell M. Kulsrud

Reconnection rate is found for the canonical simplest case of steady-state two-dimensional symmetric reconnection in an incompressible plasma by matching of outer Petschek solution and internal diffusion region solution. The reconnection…

Plasma Physics · Physics 2007-05-23 Nikolai V. Erkaev , Vladimir S. Semenov , Ferdinand Jamitzky

In this paper we present a two-dimensional numerical simulation of a reconnection current layer in incompressible resistive magnetohydrodynamics with uniform resistivity in the limit of very large Lundquist numbers. We use realistic…

Plasma Physics · Physics 2007-05-23 Dmitri A. Uzdensky , Russell M. Kulsrud

We demonstrate the dragging of the magnetic field by the super-Alfvenic shear flows out of the reconnection plane can strongly localize the reconnection x-line in collisionless plasmas, reversing the current direction at the x-line.…

Plasma Physics · Physics 2018-08-29 Yi-Hsin Liu , Michael Hesse , Fan Guo , Hui Li , T. K. M. Nakamura

In this paper, we investigate a simple model where two, initially unconnected, flux systems are forced to interact in response to the imposed boundary driving by solving the non-ideal 3D MHD equations numerically. The reconnection rate of…

Astrophysics · Physics 2007-05-23 K. Galsgaard , C. Parnell

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

Magnetic field embedded in a perfectly conducting fluid preserves its topology for all time. Although ionized astrophysical objects, like stars and galactic disks, are almost perfectly conducting, they show indications of changes in…

Astrophysics of Galaxies · Physics 2010-03-16 A. Lazarian , G. Kowal , E. Vishniac , K. Kulpa-Dubel , K. Otmianowska-Mazur

Magnetic reconnection is a plasma phenomenon where a topological rearrangement of magnetic field lines with opposite polarity results in dissipation of magnetic energy into heat, kinetic energy and particle acceleration. Such a phenomenon…

High Energy Astrophysical Phenomena · Physics 2016-08-31 Edoardo Striani , Andrea Mignone , Bhargav Vaidya , Gianluigi Bodo , Attilio Ferrari
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