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Using high spatial and temporal data from the \emph{Solar Dynamics Observatory} (\emph{SDO}) and the \emph{Interface Region Imaging Spectrograph} (\emph{IRIS}), several observational signatures of magnetic reconnection in the course of…

Solar and Stellar Astrophysics · Physics 2018-07-25 Bo Yang , Jiayan Yang , Yi Bi , Junchao Hong , Haidong Li , Zhe Xu , Hechao Chen

Solar UV bursts are small-scale features that exhibit intermittent brightenings that are thought to be due to magnetic reconnection. They are observed abundantly in the chromosphere and transition region, in particular in active regions. We…

Solar and Stellar Astrophysics · Physics 2017-09-13 L. P. Chitta , H. Peter , P. R. Young , Y. -M. Huang

When several solar flares with comparable classes occur successively at the same location and exhibit similar morphological features, they are called homologous flares. During 2012 May 8-10, five M-class homologous circular-ribbon flares…

Solar and Stellar Astrophysics · Physics 2025-06-11 Shuhong Yang , Ruisheng Zheng , Yijun Hou , Yuandeng Shen , Yin Li , Xiaoshuai Zhu , Ting Li , Guiping Zhou

Magnetic reconnection plays a crucial role in powering solar flares, production of energetic particles, and plasma heating. However, where the magnetic reconnections occur, how and where the released magnetic energy is transported, and how…

Solar and Stellar Astrophysics · Physics 2020-09-02 Sijie Yu , Bin Chen , Katharine K. Reeves , Dale E. Gary , Sophie Musset , Gregory D. Fleishman , Gelu M. Nita , Lindsay Glesener

Magnetic reconnection is a universal process that powers explosive energy release events such as solar flares, geomagnetic substorms, and some astrophysical jets. A characteristic feature of magnetic reconnection is the production of fast…

Solar and Stellar Astrophysics · Physics 2022-02-15 Chengcai Shen , Bin Chen , Katharine K. Reeves , Sijie Yu , Vanessa Polito , Xiaoyan Xie

In the previous numerical study, we find the blob formation and ejection in the presence of magnetic reconnection in the environment of the hot flow of the accretion disk. Based on those encouraging results, in the present work, we…

High Energy Astrophysical Phenomena · Physics 2021-10-20 TianLe Zhao , Rajiv Kumar

We present observations of a confined M4.0 flare from NOAA 11302 on 2011 September 26. Observations at high temporal, spatial, and spectral resolution from Solar Dynamics Observatory, Reuven Ramaty High Energy Solar Spectroscopic Imager,…

Solar and Stellar Astrophysics · Physics 2014-08-05 Upendra Kushwaha , Bhuwan Joshi , Kyung-Suk Cho , Astrid Veronig , Sanjiv Kumar Tiwari , S. K. Mathew

We aim at investigating the formation of jet-like features in the lower solar atmosphere, e.g. chromosphere and transition region, as a result of magnetic reconnection. Magnetic reconnection as occurring at chromospheric and transition…

Solar and Stellar Astrophysics · Physics 2015-05-30 J. Y. Ding , M. S. Madjarska , J. G. Doyle , Q. M. Lu , K. Vanninathan , Z. Huang

Solar flare termination shocks have been suggested as one of the promising drivers for particle acceleration in solar flares, yet observational evidence remains rare. By utilizing radio dynamic spectroscopic imaging of decimetric stochastic…

Solar and Stellar Astrophysics · Physics 2019-10-16 Bin Chen , Chengcai Shen , Katharine K. Reeves , Fan Guo , Sijie Yu

Dynamics of hot chromospheric plasma of solar flares is a key to understanding of mechanisms of flare energy release and particle acceleration. A moderate M1.0 class flare of 12 June, 2014 (SOL2014-06-12T21:12) was simultaneously observed…

On 27 October, 2003, two GOES M-class flares occurred in the lapse of three hours in active region NOAA 10486. The two flares were confined and their associated brightenings appeared at the same location, displaying a very similar shape…

Astrophysics · Physics 2008-11-26 M. L. Luoni , C. H. Mandrini , G. Cristiani , P. Démoulin

Magnetic reconnection is understood to be the main physical process that facilitates the transformation of magnetic energy into heat, motion, and particle acceleration during solar eruptions. Yet, observational constraints on reconnection…

Solar and Stellar Astrophysics · Physics 2024-02-07 Marcel F. Corchado Albelo , Maria D. Kazachenko , Benjamin J. Lynch

Typical solar flares display two quasi-parallel, bright ribbons on the chromosphere. In between is the polarity inversion line (PIL) separating concentrated magnetic fluxes of opposite polarity in active regions (ARs). Intriguingly a series…

Solar and Stellar Astrophysics · Physics 2016-09-30 Rui Liu , Jun Chen , Yuming Wang , Kai Liu

Solid evidence of magnetic reconnection is rarely reported within sunspots, the darkest regions with the strongest magnetic fields and lowest temperatures in the solar atmosphere. Using the world's largest solar telescope, the 1.6-meter…

In this article, we review some key aspects of a multi-wavelength flare which have essentially contributed to form a standard flare model based on the magnetic reconnection. The emphasis is given on the recent observations taken by the…

Solar and Stellar Astrophysics · Physics 2012-11-14 Bhuwan Joshi , Astrid Veronig , P. K. Manoharan , B. V. Somov

Fan-shaped jets can be observed above light bridges and are driven by reconnection of the vertical umbral field with the more horizontal field above the light bridges. Because these jets are not fully opaque in chromospheric lines, one…

Solar and Stellar Astrophysics · Physics 2022-03-14 A. G. M. Pietrow , M. Druett , J. de la Cruz Rodriguez , F. Calvo , D. Kiselman

Solar flares with a fan-spine magnetic topology can form circular ribbons. The previous study based on H\alpha line observations of the solar flares during March 05, 2014 by Xu et al. (2017) revealed uniform and continuous rotation of the…

Solar and Stellar Astrophysics · Physics 2020-10-21 L. K. Kashapova , E. G. Kupriyanova , Z. Xu , H. A. S. Reid , D. Y. Kolotkov

We study flare processes in the lower solar atmosphere using observational data for a M1-class flare of June 12, 2014, obtained by New Solar Telescope (NST/BBSO) and Helioseismic Magnetic Imager (HMI/SDO). The main goal is to understand…

Solar and Stellar Astrophysics · Physics 2016-04-20 I. N. Sharykin , V. M. Sadykov , A. G. Kosovichev , S. Vargas-Dominguez , I. V. Zimovets

We report two sympathetic solar eruptions, including a partial and a full flux rope eruption in a quadrupolar magnetic region, where a large and a small filament resided above the middle and the east neutral lines respectively. The large…

Solar and Stellar Astrophysics · Physics 2015-06-04 Yuandeng Shen , Yu Liu , Jiangtao Su

Flare ribbons serve as chromospheric footprints of energy deposition resulting from particle acceleration during magnetic reconnection. Their fine-scale structure provides a valuable tool for probing the dynamics of the flare reconnection…