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Strong solar flares and coronal mass ejections (CMEs) are prone to originate within and near active regions (ARs) with a high magnetic complexity. Therefore, to better understand the generation mechanism of flares and the resultant CME…

Solar and Stellar Astrophysics · Physics 2024-09-26 Shin Toriumi

Solar flares are energetic events taking place in the Sun's atmosphere, and their effects can greatly impact the environment of the surrounding planets. In particular, eruptive flares, as opposed to confined flares, launch coronal mass…

Solar and Stellar Astrophysics · Physics 2016-01-20 Miho Janvier , Guillaume Aulanier , Pascal Demoulin

Flares and CMEs can have deleterious effects on their surroundings: they can erode atmospheres of orbiting planets over time and also have high importance in stellar evolution. Most of the CME detections in the literature are single events…

Interest in stealth coronal mass ejections (CMEs) is increasing due to their relatively high occurrence rate and space weather impact. However, typical CME signatures such as extreme-ultraviolet dimmings and post-eruptive arcades are hard…

Coronal mass ejections (CMEs) are large clouds of magnetized plasma ejected from the Sun, and are often associated with acceleration of electrons that can result in radio emission via various mechanisms. However, the underlying mechanism…

Solar and Stellar Astrophysics · Physics 2022-05-25 Lei Lu , Li Feng , Weiqun Gan

Stars interact with their planets through gravitation, radiation, and magnetic fields. Although magnetic activity decreases with time, reducing associated high-energy (e.g., coronal XUV emission, flares), stellar winds persist throughout…

Solar and Stellar Astrophysics · Physics 2022-11-08 J. J. Chebly , J. D. Alvarado-Gómez , K. Poppenhaeger

Coronal mass ejections (CMEs) originate from closed magnetic field regions on the Sun, which are active regions and quiescent filament regions. The energetic populations such as halo CMEs, CMEs associated with magnetic clouds, geoeffective…

Solar and Stellar Astrophysics · Physics 2015-05-13 N. Gopalswamy , S. Akiyama , S. Yashiro , P. Makela

On the Sun, the energetic, erupting phenomena of flares and coronal mass ejections (CMEs) often occur together. While space-based photometry has revealed frequent white-light flares for vast numbers of stars, only a handful of coronal mass…

Solar and Stellar Astrophysics · Physics 2024-07-17 K. Vida , B. Seli , R. M. Roettenbacher , A. Görgei , L. Kriskovics , Zs. Kővári , K. Oláh

Two major processes have been proposed to convert the coronal magnetic energy into the kinetic energy of a coronal mass ejection (CME): resistive magnetic reconnection and ideal macroscopic magnetohydrodynamic instability of magnetic flux…

Solar and Stellar Astrophysics · Physics 2015-06-16 H. Q. Song , Y. Chen , D. D. Ye , G. Q. Han , G. H. Du , G. Li , J. Zhang , Q. Hu

Coronal mass ejections (CMEs) are explosive plasma phenomena prevalently occurring on the Sun and probably on other magnetically active stars. However, how their pre-eruptive configuration evolves toward the main explosion remains elusive.…

Solar and Stellar Astrophysics · Physics 2023-08-28 X. Cheng , C. Xing , G. Aulanier , S. K. Solanki , H. Peter , M. D. Ding

Coronal mass ejections (CMEs) are large scale eruptions observed close to the Sun. They are travelling through the heliosphere and possibly interacting with the Earth environment creating interruptions or even damaging new technology…

Solar and Stellar Astrophysics · Physics 2022-07-08 C. Verbeke , B. Schmieder , P. Démoulin , S. Dasso , B. Grison , E. Samara , C. Scolini , S. Poedts

Solar coronal mass ejections (CMEs) have a strong association with solar flares that is not fully understood. This characteristic of our Sun's magnetic activity may also occur on other stars, but the lack of successfully detected stellar…

Solar and Stellar Astrophysics · Physics 2022-08-31 Maurice L. Wilson , John C. Raymond

Solar filament eruptions play a crucial role in triggering coronal mass ejections (CMEs). More than 80 % of eruptions lead to a CME. This correlation has been studied extensively during the past solar cycles and the last long solar minimum.…

Solar and Stellar Astrophysics · Physics 2015-06-12 B. Schmieder , P. Demoulin , G. Aulanier

Most simulations of coronal mass ejections (CMEs) to date either focus on the interplanetary propagation of a giant plasma "blob" without paying too much attention to its origin and to the formation process or they focus on the complex…

Solar and Stellar Astrophysics · Physics 2014-11-20 N. Lugaz , I. I. Roussev , I. V. Sokolov , C. Jacobs

Solar coronal mass ejections (CMEs) are the most significant drivers of adverse space weather at Earth, but the physics governing their propagation through the heliosphere is not well understood. While stereoscopic imaging of CMEs with the…

Solar and Stellar Astrophysics · Physics 2010-11-15 Jason P. Byrne , Shane A. Maloney , R. T. James McAteer , Jose M. Refojo , Peter T. Gallagher

Aims. Our goal is to thoroughly analyse the dynamics of single and multiple solar eruptions, as well as a stealth ejecta. The data were obtained through self-consistent numerical simulations performed in a previous study. We also assess the…

Solar and Stellar Astrophysics · Physics 2022-07-13 Dana-Camelia Talpeanu , Stefaan Poedts , Elke D'Huys , Marilena Mierla , Ian G. Richardson

Roles played by the currents in the impulsive phase of a solar flare and in a coronal mass ejection (CME) are reviewed. Solar flares are magnetic explosions: magnetic energy stored in unneutralized currents in coronal loops is released into…

Solar and Stellar Astrophysics · Physics 2017-08-16 D. B. Melrose

Coronal mass ejections (CMEs) are often accompanied by coronal dimming evident in extreme ultraviolet (EUV) and soft X-ray observations. The locations of dimming are sometimes considered to map footpoints of the erupting flux rope. As the…

Solar and Stellar Astrophysics · Physics 2016-07-06 J. X. Cheng , J. Qiu

Type II radio bursts are observed in the Sun in association with many coronal mass ejections (CME's. In view of this association, there has been an expectation that, by scaling from solar flares to the flares which are observed on M dwarfs,…

Solar and Stellar Astrophysics · Physics 2019-03-06 D. J. Mullan , R. R. Paudel

Coronal mass ejections (CMEs) can exhibit non-radial evolution. The background magnetic field is considered the main driver for the trajectory deviation relative to the source region. The influence of the magnetic environment has been…

Solar and Stellar Astrophysics · Physics 2024-12-30 A. Sahade , A. Vourlidas , C. Mac Cormack