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Numerous observations have revealed that power-law distributions are ubiquitous in energetic solar processes. Hard X-rays, soft X-rays, extreme ultraviolet radiation, and radio waves all display power-law frequency distributions. Since…

Solar and Stellar Astrophysics · Physics 2018-02-14 Kalman J. Knizhnik , Vadim M. Uritsky , James A. Klimchuk , C. Richard DeVore

For a solar flare occurring on 2010 November 3, we present observations using several SDO/AIA extreme-ultraviolet (EUV) passbands of an erupting flux rope followed by inflows sweeping into a current sheet region. The inflows are soon…

Solar and Stellar Astrophysics · Physics 2015-06-03 S. L. Savage , G. Holman , K. K. Reeves , D. B. Seaton , D. E. McKenzie , Y. Su

Within the framework of a two-fluid description possible pathways for the generation of fast flows (dynamical as well as steady) in the lower solar atmosphere is established. It is shown that a primary plasma flow (locally sub-Alfv\'enic)…

Employing Solar Dynamics Observatory/Atmospheric Imaging Assembly (AIA) multi-wavelength images, we have presented coronal condensations caused by magnetic reconnection between a system of open and closed solar coronal loops. In this…

Solar and Stellar Astrophysics · Physics 2019-01-16 Leping Li , Jun Zhang , Peter Hardi , Lakshmi Pradeep Chitta , Jiangtao Su , Hongqiang Song , Chun Xia , Yijun Hou

The structure of magnetic reconnection-driven outflows and their dissipation are explored with large-scale, 3-D particle-in-cell (PIC) simulations. Outflow jets resulting from 3-D reconnection with a finite length x-line form fronts as they…

Plasma Physics · Physics 2015-06-18 J. F. Drake , M. Swisdak , P. A. Cassak , T. D. Phan

We developed an experimental platform for studying magnetic reconnection in an external magnetic field with simultaneous measurements of plasma imaging, flow velocity, and magnetic-field variation. Here, we investigate the stagnation and…

Magnetic field-aligned electric fields are characteristic features of magnetic reconnection processes operating in externally agitated magnetized plasmas. An especially interesting environment for such a process are the coronae of accretion…

Astrophysics · Physics 2011-05-23 R. Schopper , H. Lesch , G. T. Birk

Magnetic reconnection is an explosive process that accelerates particles to high energies in Earth's magnetosphere, offering a unique natural laboratory to study this phenomenon. This study investigates how well data-driven fully kinetic…

Space Physics · Physics 2026-02-18 Nadja Reisinger , Fabio Bacchini

As a fundamental process converting magnetic to plasma energy in high-energy astrophysical plasmas, relativistic magnetic reconnection is a leading explanation for the acceleration of particles to the ultrarelativistic energies necessary to…

High Energy Astrophysical Phenomena · Physics 2017-07-26 Gregory R. Werner , Dmitri A. Uzdensky

We study the energy release process of a set of 51 flares (32 confined, 19 eruptive) ranging from GOES class B3 to X17. We use H$\alpha$ filtergrams from Kanzelh\"ohe Observatory together with SDO HMI and SOHO MDI magnetograms to derive…

Solar and Stellar Astrophysics · Physics 2018-02-07 Johannes Tschernitz , Astrid M. Veronig , Julia K. Thalmann , Jürgen Hinterreiter , Werner Pötzi

Context: The strong electric fields associated with magnetic reconnection in solar flares are a plausible mechanism to accelerate populations of high energy, non-thermal particles. One such reconnection scenario occurs at a 3D magnetic null…

Solar and Stellar Astrophysics · Physics 2015-06-03 Adam J. Stanier , Philippa K. Browning , Silvia Dalla

We use 3D fully kinetic particle-in-cell simulations to study the occurrence of magnetic reconnection in a simulation of decaying turbulence created by anisotropic counter-propagating low-frequency Alfv\'en waves consistent with…

Electron heating in an ultracold neutral plasma is modeled using classical molecular dynamics simulations in the presence of an externally applied magnetic field. A sufficiently strong magnetic field is found to reduce disorder induced…

Plasma Physics · Physics 2018-02-14 Sanat Kumar Tiwari , Scott D. Baalrud

The density decreases exponentially with height in the solar gravitationally stratified atmosphere, therefore the collisional coupling between the ionized plasma and the neutrals also decreases. Here, we investigate the role of collisions…

Solar and Stellar Astrophysics · Physics 2023-10-11 B. Popescu Braileanu , R. Keppens

The rate of magnetic reconnection is of the utmost importance in a variety of processes because it controls, for example, the rate energy is released in solar flares, the speed of the Dungey convection cycle in Earth's magnetosphere, and…

Plasma Physics · Physics 2022-04-29 Yi-Hsin Liu , Paul Cassak , Xiaocan Li , Michael Hesse , Shan-Chang Lin , Kevin Genestreti

Cooling microwave resonators to near the quantum ground state, crucial for their operation in the quantum regime, is typically achieved by direct device refrigeration to a few tens of millikelvin. However, in quantum experiments that…

Quantum Physics · Physics 2020-01-29 Mingrui Xu , Xu Han , Chang-Ling Zou , Wei Fu , Yuntao Xu , Changchun Zhong , Liang Jiang , Hong X. Tang

The discovery of rapid synchrotron gamma-ray flares above 100 MeV from the Crab Nebula has attracted new interest in alternative particle acceleration mechanisms in pulsar wind nebulae. Diffuse shock-acceleration fails to explain the flares…

High Energy Astrophysical Phenomena · Physics 2015-06-17 Benoit Cerutti , Gregory R. Werner , Dmitri A. Uzdensky , Mitchell C. Begelman

High cadence, multiwavelength, optical observations of a solar active region are presented, obtained with the Swedish Solar Telescope. Two magnetic bright points are seen to separate in opposite directions at a constant velocity of 2.8km/s.…

Solar and Stellar Astrophysics · Physics 2015-05-18 D. B. Jess , M. Mathioudakis , P. K. Browning , P. J. Crockett , F. P. Keenan

We characterize the plasma flows generated during the ablation stage of an over-massed exploding planar wire array, fielded on the COBRA pulsed-power facility (1 MA peak current, 250 ns rise time). The planar wire array is designed to…

Magnetic reconnection is a ubiquitous and fundamental process in plasmas by which magnetic fields change their topology and release magnetic energy. Despite decades of research, the physics governing the reconnection process in many…

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