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The current sheet is an essential feature in solar flares and is the primary site for magnetic reconnetion and energy release. Imaging observations feature a long linear structure above the candle-flame-shaped flare loops, which resembles…

Solar and Stellar Astrophysics · Physics 2024-07-03 Tingyu Gou , Katharine K. Reeves

The elongated bright structures above solar flare loops are suggested to be current sheets, where magnetic reconnection takes place. Observations have revealed various characteristics of the current sheet; however, their physical origin…

Solar and Stellar Astrophysics · Physics 2025-02-21 Zining Ren , Yulei Wang , Xin Cheng , Mingde Ding

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…

Solar and Stellar Astrophysics · Physics 2018-10-24 X. Cheng , Y. Li , L. F. Wan , M. D. Ding , P. F. Chen , J. Zhang , J. J. Liu

We report on the structure and evolution of a current sheet that formed in the wake of an eruptive X8.3 flare observed at the west limb of the Sun on September 10, 2017. Using observations from the EUV Imaging Spectrometer (EIS) on Hinode…

Solar and Stellar Astrophysics · Physics 2018-02-28 Harry P. Warren , David H. Brooks , Ignacio Ugarte-Urra , Jeffrey W. Reep , Nicholas A. Crump , George A. Doschek

In the solar corona, magnetic reconnection occurs due to the finite resistivity of the plasma. At the same time, resistivity leads to ohmic heating. Therefore, the reconnecting current sheet should heat the surrounding plasma. This paper…

Solar and Stellar Astrophysics · Physics 2023-06-06 Anton Reva , Sergey Bogachev , Ivan Loboda , Artem Ulyanov , Alexey Kirichenko

A current sheet, where magnetic energy is liberated through reconnection and is converted to other forms, is thought to play the central role in solar flares, the most intense explosions in the heliosphere. However, the evolution of a…

Solar and Stellar Astrophysics · Physics 2021-04-28 L. P. Chitta , E. R. Priest , X. Cheng

We report multi-wavelength and multi-viewpoint observations of a solar eruptive event which involves loop-loop interactions. During a C2.0 flare, motions associated with inflowing and outflowing plasma provide evidence for ongoing magnetic…

Solar and Stellar Astrophysics · Physics 2016-04-27 Chunming Zhu , Rui Liu , David Alexander , R. T. James McAteer

Magnetic reconnection changes the magnetic field topology and powers explosive events in astrophysical, space and laboratory plasmas. For flares and coronal mass ejections (CMEs) in the solar atmosphere, the standard model predicts the…

Solar and Stellar Astrophysics · Physics 2010-10-11 Rui Liu , Jeongwoo Lee , Tongjiang Wang , Guillermo Stenborg , Chang Liu , Haimin Wang

The presence of current sheet instabilities, such as the tearing mode instability, are needed to account for the observed rate of energy release in solar flares. Insights into these current sheet dynamics can be revealed by the behaviour of…

Solar and Stellar Astrophysics · Physics 2021-12-08 Ryan J. French , Sarah A. Matthews , I. Jonathan Rae , Andrew W. Smith

Magnetic reconnection in current sheets converts magnetic energy into particle energy. The process may play an important role in the acceleration and heating of the solar wind close to the Sun. Observations from Parker Solar Probe provide a…

Solar flares can release coronal magnetic energy explosively and may impact the safety of near-earth space environments. Their structures and properties on macroscale have been interpreted successfully by the generally-accepted…

Solar and Stellar Astrophysics · Physics 2023-09-11 Yulei Wang , Xin Cheng , Mingde Ding , Zhaoyuan Liu , Jian Liu , Xiaojue Zhu

Magnetic reconnection is a fundamental physical process converting magnetic energy into not only plasma energy but also particle energy in various astrophysical phenomena. In this letter, we show a unique dataset of a solar flare where…

Solar and Stellar Astrophysics · Physics 2022-01-12 Lei Lu , Li Feng , Alexander Warmuth , Astrid M. Veronig , Jing Huang , Siming Liu , Weiqun Gan , Zongjun Ning , Beili Ying , Guannan Gao

A reconnecting current layer is a `heart' of a solar flare, because it is a place of magnetic-field energy release. However there are no direct observations of these layers. The aim of our work is to understand why we actually do not…

Solar and Stellar Astrophysics · Physics 2014-04-18 A. V. Oreshina , I. V. Oreshina

Magnetic reconnection before flux cancellation in the solar photosphere when two opposite-polarity photospheric magnetic fragments are approaching one another is usually modelled by assuming that a small so-called "floating current sheet"…

Solar and Stellar Astrophysics · Physics 2024-10-16 Eric R. Priest , David I. Pontin

Current sheet is a common structure involved in solar eruptions. However, it is observed in minority of the events and the physical properties of its fine structures during a solar eruption are rarely investigated. Here, we report an…

Solar and Stellar Astrophysics · Physics 2024-04-30 Zhenyong Hou , Hui Tian , Maria S. Madjarska , Hechao Chen , Tanmoy Samanta , Xianyong Bai , Zhentong Li , Yang Su , Wei Chen , Yuanyong Deng

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

We present AIA observations of a structure we interpret as a current sheet associated with an X4.9 flare and coronal mass ejection that occurred on 2014~February~25 in NOAA Active Region 11990. We characterize the properties of the current…

Solar and Stellar Astrophysics · Physics 2017-02-01 Daniel B. Seaton , Allison E. Bartz , Jonathan M. Darnel

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…

Solar and Stellar Astrophysics · Physics 2017-07-26 John C. Raymond , Silvio Giordano , Angela Ciaravella

We report the simultaneous extreme ultraviolet observation of magnetic reconnection inflow and outflow in a flare on 2010 August 18 observed by the Atmospheric Imaging Assembly on board the {\it Solar Dynamics Observatory}. We found that…

Solar and Stellar Astrophysics · Physics 2015-06-03 Shinsuke Takasao , Ayumi Asai , Hiroaki Isobe , Kazunari Shibata

An MHD model of a Hydrogen plasma with flow, an energy equation, NLTE ionization and radiative cooling, and an Ohm's law with anisotropic electrical conduction and thermoelectric effects is used to self-consistently generate atmospheric…

Solar and Stellar Astrophysics · Physics 2014-06-06 Michael L. Goodman , Philip G. Judge
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