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Magnetic separators, which lie on the boundary between four topologically-distinct flux domains, are prime locations in three-dimensional magnetic fields for reconnection, especially in the magnetosphere between the planetary and…

等离子体物理 · 物理学 2016-01-29 Julie E. H. Stevenson , Clare E. Parnell

For 3D magnetic reconnection to occur there must exist a volume within which the electric field component parallel to the magnetic field is non-zero. In numerical experiments, locations of non-zero parallel electric field indicate sites of…

太阳与恒星天体物理 · 物理学 2024-09-25 Clare E Parnell

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…

天体物理学 · 物理学 2007-05-23 K. Galsgaard , C. Parnell

Separators, which are in many ways the three-dimensional equivalent to two-dimensional nulls, are important sites for magnetic reconnection. Magnetic reconnection occurs in strong current layers which have very short length scales. The aim…

太阳与恒星天体物理 · 物理学 2014-12-17 J. E. H. Stevenson , C. E. Parnell , E. R. Priest , A. L. Haynes

Magnetic reconnection is a fundamental process in a laboratory, magnetospheric, solar and astrophysical plasma, whereby magnetic energy is converted into heat, bulk kinetic energy and fast particle energy. Its nature in two dimensions is…

太阳与恒星天体物理 · 物理学 2021-06-09 Ting Li , Eric Priest , Ruilong Guo

Three-dimensional magnetic null points are ubiquitous in the solar corona, and in any generic mixed-polarity magnetic field. We consider magnetic reconnection at an isolated coronal null point, whose fan field lines form a dome structure.…

太阳与恒星天体物理 · 物理学 2013-08-29 D. I. Pontin , E. R. Priest , K. Galsgaard

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

Magnetic reconnection occurs when new flux emerges into the corona and becomes incorporated into the existing coronal field. A new active region (AR) emerging in the vicinity of an existing AR provides a convenient laboratory in which…

太阳与恒星天体物理 · 物理学 2020-01-08 Marika I. McCarthy , Dana W. Longcope , Anna Malanushenko , David E. McKenzie

There is ample evidence for magnetic reconnection in the solar system, but it is a nontrivial task to visualize, to determine the proper approaches and frames to study, and in turn to elucidate the physical processes at work in reconnection…

Solar flare ribbons, manifesting as transient brightenings in the chromosphere, are believed to trace out the footpoints of magnetic field lines that are reconnecting higher in the solar atmosphere. These field lines lie in a separatrix or…

太阳与恒星天体物理 · 物理学 2026-03-26 Graham Barnes , Karin Dissauer

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…

太阳与恒星天体物理 · 物理学 2016-09-21 Leping Li , Jun Zhang , Hardi Peter , Eric Priest , Huadong Chen , Lijia Guo , Feng Chen , Duncan Mackay

Reconnection is one of the key processes in astrophysical and laboratory plasmas: it is the opposite of a dynamo. Looking at energy, a dynamo transforms kinetic energy in magnetic energy while reconnection takes magnetic energy and returns…

等离子体物理 · 物理学 2019-02-20 Giovanni Lapenta , Stefano Markidis , Andrey Divin , David Newman , Martin Goldman

Magnetic reconnection plays an essential role in the generation and evolution of astrophysical magnetic fields. The best tested and most robust reconnection theory is that of Parker and Sweet. According to this theory, the reconnection rate…

天体物理学 · 物理学 2009-11-07 Fabian Heitsch , Ellen G. Zweibel

Magnetic reconnection is a ubiquitous plasma process in which oppositely directed magnetic field lines break and rejoin, resulting in a change of the magnetic field topology. Reconnection generates magnetic islands: regions enclosed by…

等离子体物理 · 物理学 2020-10-06 Divya Banesh , Li-Ta Lo , Patrick Kilian , Fan Guo , Bernd Hamann

There is growing evidence that when magnetic reconnection occurs in high Lundquist number plasmas such as in the Solar Corona or the Earth's Magnetosphere it does so within a fragmented, rather than a smooth current layer. Within the extent…

太阳与恒星天体物理 · 物理学 2016-07-12 Peter F. Wyper , Michael Hesse

Detection of a separator line that connects magnetic nulls and the determination of the dynamics and plasma environment of such a structure can improve our understanding of the three-dimensional (3D) magnetic reconnection process. However,…

The aim of this work is to investigate and characterise particle behaviour in a 3D magnetohydrodynamic (MHD) model of a reconnecting magnetic separator. We use a relativistic guiding-centre test-particle code to investigate electron and…

太阳与恒星天体物理 · 物理学 2015-12-23 J. Threlfall , J. E. H. Stevenson , C. E. Parnell , T. Neukirch

The definition and measurement of magnetic reconnection in three-dimensional magnetic fields with multiple reconnection sites is a challenging problem, particularly in fields lacking null points. We propose a generalization of the familiar…

等离子体物理 · 物理学 2015-05-28 A. R. Yeates , G. Hornig

Magnetic reconnection is one of the fundamental dynamical processes in the solar corona. The method of studying reconnection in active region-scale magnetic fields generally depends on non-local methods (i.e. requiring information across…

太阳与恒星天体物理 · 物理学 2025-04-04 David MacTaggart

Magnetic reconnection is a fundamental process in a plasma that facilitates the release of energy stored in the magnetic field by permitting a change in the magnetic topology. In this article we present a review of the current state of…

太阳与恒星天体物理 · 物理学 2012-07-04 D. I. Pontin
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