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Magnetic flux ropes are a bundle of twisted magnetic field lines produced by internal electric currents, which are responsible for solar eruptions and are the major drivers of geomagnetic storms. As such, it is crucial to develop a…

太阳与恒星天体物理 · 物理学 2023-10-31 J. H. Guo , Y. W. Ni , Y. Guo , C. Xia , B. Schmieder , S. Poedts , Z. Zhong , Y. H. Zhou , F. Yu , P. F. Chen

A standard model for eruptive flares aims at describing observational 3D features of the reconnecting coronal magnetic field. Extensions to the 2D model require the physical understanding of 3D reconnection processes at the origin of the…

太阳与恒星天体物理 · 物理学 2015-06-16 Miho Janvier , Guillaume Aulanier , Etienne Pariat , Pascal Demoulin

Magnetic reconnection is a fundamental physical process in various astrophysical, space, and laboratory environments. Many pieces of evidence for magnetic reconnection have been uncovered. However, its specific processes that could be…

太阳与恒星天体物理 · 物理学 2018-10-24 X. Cheng , Y. Li , L. F. Wan , M. D. Ding , P. F. Chen , J. Zhang , J. J. Liu

Magnetic reconnection plays an integral part in nearly all models of solar flares and coronal mass ejections (CMEs). The reconnection heats and accelerates the plasma, produces energetic electrons and ions, and changes the magnetic topology…

太阳与恒星天体物理 · 物理学 2017-07-26 John C. Raymond , Silvio Giordano , Angela Ciaravella

Magnetic field fluctuations in MHD turbulence can be viewed as current sheets that are progressively more anisotropic at smaller scales. As suggested by Loureiro & Boldyrev (2017) and Mallet et al (2017), below a certain critical thickness…

等离子体物理 · 物理学 2017-08-09 Stanislav Boldyrev , Nuno F. Loureiro

Magnetic reconnection can explosively release magnetic energy when opposing magnetic fields merge and annihilate through a current sheet, driving plasma jets and accelerating non-thermal particle populations to high energy, in plasmas…

Aiming to capture the formation and eruption of flux ropes (FRs) in the source active regions (ARs), we simulate the coronal magnetic field evolution of the AR 11429 employing the time-dependent magneto-friction model (TMF). The initial…

太阳与恒星天体物理 · 物理学 2024-09-24 P. Vemareddy

In an attempt to test current initiation models of coronal mass ejections (CMEs), with an emphasis on the magnetic breakout model, we inspect the magnetic topology of the sources of 26 CME events in the context of their chromospheric and…

天体物理学 · 物理学 2011-02-11 I. Ugarte-Urra , H. P. Warren , A. R. Winebarger

We present observations of the eruption and then reformation of a filament caused by its nearby emerging magnetic flux. Driven by the emerging magnetic flux, the emerged positive fluxes moved toward and cancelled with its nearby negative…

太阳与恒星天体物理 · 物理学 2019-04-03 Bo Yang , Huadong Chen

X-ray activity of Anomalous X-ray Pulsars and Soft Gamma-Ray Repeaters may result from the heating of their magnetic corona by direct currents dissipated by magnetic reconnection. We investigate the possibility that X-ray flares and bursts…

天体物理学 · 物理学 2011-07-18 Maxim Lyutikov

We study the magnetic structure of successively erupting sigmoid in active region 12371 by modeling the quasi-static coronal field evolution with non-linear force-free field (NLFFF) equilibria. HMI/SDO vector magnetograms are used as input…

太阳与恒星天体物理 · 物理学 2018-05-02 P. Vemareddy , P. Demóulin

We clarify a relationship of the dynamics of a solar flare and a growing Coronal Mass Ejection (CME) by investigating the dynamics of magnetic fields during the X2.2-class flare taking place in the solar active region 11158 on 2011 February…

太阳与恒星天体物理 · 物理学 2015-06-23 S. Inoue , K. Hayashi , T. Magara , G. S. Choe , Y. D. Park

The rotation of erupting filaments in the solar corona is addressed through a parametric simulation study of unstable, rotating flux ropes in bipolar force-free initial equilibrium. The Lorentz force due to the external shear field…

太阳与恒星天体物理 · 物理学 2015-06-03 B. Kliem , T. Török , W. T. Thompson

The magnetic flux rope (MFR) is believed to be the underlying magnetic structure of coronal mass ejections (CMEs). However, it remains unclear how an MFR evolves into and forms the multi-component structure of a CME. In this paper, we…

太阳与恒星天体物理 · 物理学 2015-06-17 X. Cheng , M. D. Ding , Y. Guo , J. Zhang , A. Vourlidas , Y. D. Liu , O. Olmedo , J. Q. Sun , C. Li

We investigate the failed partial eruption of a filament system in NOAA AR 12104 on 2014 July 5, using multiwavelength EUV, magnetogram, and H$\alpha$ observations, as well as magnetic field modeling. The filament system consists of two…

太阳与恒星天体物理 · 物理学 2021-12-22 Jialin Chen , Yingna Su , Rui Liu , Bernhard Kliem , Qingmin Zhang , Haisheng Ji , Tie Liu

Combined tearing-thermal evolution plays an important role in the disruption of current sheets, and formation of cool condensations within the solar atmosphere. However, this has received limited attention to date. We numerically explore a…

太阳与恒星天体物理 · 物理学 2023-10-18 Samrat Sen , Jack Jenkins , Rony Keppens

When magnetic field in the solar convection zone buoyantly rises to pierce the visible solar surface (photosphere), the atmosphere (corona) above this surface must respond in some way. One response of the coronal field to photospheric…

太阳与恒星天体物理 · 物理学 2013-09-19 Lucas A. Tarr

We present the first results of three-dimensional (3D) numerical magnetohydrodynamic (MHD) simulations of the onset of magnetic reconnection via the tearing instability in dynamically thinning current sheets in the solar corona. In all our…

太阳与恒星天体物理 · 物理学 2024-06-10 James Leake , Lars Daldorff , James Klimchuk

We investigated the dynamic evolution of a 3-dimensional (3D) flux rope eruption and magnetic reconnection process in a solar flare, by simply extending 2-dimensional (2D) resistive magnetohydrodynamic simulation model of solar flares with…

太阳与恒星天体物理 · 物理学 2013-09-18 Keisuke Nishida , Naoto Nishizuka , Kazunari Shibata

The magnetic breakout model explains a variety of solar eruptions, ranging from small-scale jets to large-scale coronal mass ejections (CMEs). Most of our previous studies are focused on jets and CMEs in single null-point topologies. Here,…

太阳与恒星天体物理 · 物理学 2025-09-16 Pankaj Kumar , Judith T. Karpen , Peter F. Wyper , David Lario , Spiro K. Antiochos , C. Richard DeVore