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The contemporary multi-wavelength observations have revealed various important features during solar flares which, on one hand, support the two-dimensional (2D) "standard flare model" while, on other hand, also urge for the exploration of…

太阳与恒星天体物理 · 物理学 2024-09-17 Bhuwan Joshi , Prabir K. Mitra , Astrid M. Veronig , R. Bhattacharyya

Large solar flares and eruptions may influence remote regions through perturbations in the outer-atmospheric magnetic field, leading to causally related events outside of the primary or triggering eruptions that are referred to as…

太阳与恒星天体物理 · 物理学 2015-11-04 Carolus J. Schrijver , Paul A. Higgins

Nanoflares, the basic unit of impulsive energy release may produce much of the solar background emission. Extrapolation of the energy frequency distribution of observed microflares, which follows a power law to lower energies can give an…

太阳与恒星天体物理 · 物理学 2011-12-22 E. Tajfirouze , H. Safari

Solar flares are complicated physical phenomena that are observable in a broad range of the electromagnetic spectrum, from radiowaves to $\gamma$-rays. For a more comprehensive understanding of flares, it is necessary to perform a combined…

太阳与恒星天体物理 · 物理学 2017-08-02 Viacheslav M Sadykov , Alexander G Kosovichev , Vincent Oria , Gelu M Nita

Solar flares are the most powerful, magnetically driven, explosions in the heliosphere. The nature of magnetic energy release in the solar corona that heats the plasma and accelerates particles in a flare, however, remains poorly…

Computational heliophysics has shed light on the fundamental physical processes inside the Sun, such as the differential rotation, meridional circulation, and dynamo-generation of magnetic fields. However, despite the substantial advances,…

太阳与恒星天体物理 · 物理学 2023-01-25 A. G. Kosovichev , G. Guerrero , A. M. Stejko , V. V. Pipin , A. V. Getling

In this paper, we demonstrate the applicability of the data-driven and self-consistent solar energetic particle model, Solar-wind with FIeld-lines and Energetic-particles (SOFIE), to simulate acceleration and transport processes of solar…

This paper reviews our growing understanding of the physics behind coronal heating (in open-field regions) and the acceleration of the solar wind. Many new insights have come from the last solar cycle's worth of observations and theoretical…

太阳与恒星天体物理 · 物理学 2010-02-02 Steven R. Cranmer , John L. Kohl , Mari Paz Miralles , Adriaan A. van Ballegooijen

We aim to better characterize the conditions of the solar corona, especially with respect to the occurrence of confined and eruptive flares. In this work, we model the coronal evolution around 231 large flares observed during solar cycle…

太阳与恒星天体物理 · 物理学 2025-01-29 Julia K. Thalmann , Manu Gupta , Astrid M. Veronig , Yang Liu

Recent observations and simulations indicate that solar flares undergo extremely complex three-dimensional (3D) evolution, making 3D particle transport models essential for understanding electron acceleration and interpreting flare…

太阳与恒星天体物理 · 物理学 2025-08-19 Xiaocan Li , Chengcai Shen , Xiaoyan Xie , Fan Guo , Bin Chen , Ivan Oparin , Yuqian Wei , Sijie Yu , Jeongbhin Seo

Solar X-ray jets are evidently made by a burst of reconnection of closed magnetic field in a jet's base with ambient "open" field (1,2). In the widely-accepted version of the "emerging-flux" model, that reconnection occurs at a current…

太阳与恒星天体物理 · 物理学 2017-05-10 Alphonse C. Sterling , Ronald L. Moore , David A. Falconer , Mitzi Adams

Solar Energetic Particles (SEPs) are an important aspect of space weather. SEP events posses a high destructive potential, since they may cause disruptions of communication systems on Earth and be fatal to crew members onboard spacecrafts…

空间物理 · 物理学 2018-09-05 D. Borovikov , I. V. Sokolov , I. Roussev , A. Taktakishvili , T. I. Gombosi

One of the leading hypotheses for sunquake generation suggests that flare-accelerated particles originating from the reconnection site in the corona travel down to the chromosphere and photosphere, where they deposit energy through…

太阳与恒星天体物理 · 物理学 2025-09-09 John Stefan , Alexander Kosovichev

Heliophysics theory and modeling build understanding from fundamental principles to motivate, interpret, and predict observations. Together with observational analysis, they constitute a comprehensive scientific program in heliophysics. As…

Solar Energetic Particles (SEPs) are an important component of Space Weather, including radiation hazard to humans and electronic equipment, and the ionisation of the Earth's atmosphere. We review the key observations of SEPs, our current…

太阳与恒星天体物理 · 物理学 2017-05-23 Karl-Ludwig Klein , Silvia Dalla

Recent space based observations of the Sun revealed that magnetic reconnection is ubiquitous in the solar atmosphere, ranging from small scale reconnection (observed as nanoflares) to large scale one (observed as long duration flares or…

太阳与恒星天体物理 · 物理学 2016-07-01 Kazunari Shibata , Shinsuke Takasao

Observations from the Kepler mission have revealed frequent superflares on young and active solar-like stars. Superflares result from the large-scale restructuring of stellar magnetic fields, and are associated with the eruption of coronal…

We present a detailed analysis of a confined filament eruption and jet associated with a C1.5 class solar flare. Multi-wavelength observations from GONG and SDO reveal the filament forming over several days following the emergence and then…

太阳与恒星天体物理 · 物理学 2020-01-08 Lauren Doyle , Peter F. Wyper , Eamon Scullion , James A. McLaughlin , Gavin Ramsay , J. Gerard Doyle

n order to better understand the solar genesis of interplanetary magnetic clouds (MCs) we model the magnetic and topological properties of four large eruptive solar flares and relate them to observations. We use the three-dimensional…

太阳与恒星天体物理 · 物理学 2015-05-27 Maria D. Kazachenko , Richard C. Canfield , Dana W. Longcope , Jiong Qiu

Solar flares are powerful radiations occuring in the Sun's atmosphere. They are powered by magnetic reconnection, a phemonenon that can convert magnetic energy into other forms of energy such as heat and kinetic energy, and it is believed…

太阳与恒星天体物理 · 物理学 2017-02-08 Miho Janvier