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We investigate the coronal and interplanetary evolution of a coronal mass ejection (CME) launched on 2010 September 4 from a source region linking two active regions (ARs) 11101 and 11103, using extreme ultraviolet imaging, magnetogram,…

太阳与恒星天体物理 · 物理学 2017-05-24 Huidong Hu , Ying D. Liu , Rui Wang , Xiaowei Zhao , Bei Zhu , Zhongwei Yang

Aims. The study of the morphology of coronal mass ejections (CMEs) is an auspicious approach to understanding how magnetic fields are structured within CMEs. Although earlier studies have suggested an asymmetry in the width of CMEs in…

太阳与恒星天体物理 · 物理学 2020-03-25 Hebe Cremades , Francisco A. Iglesias , Luciano A. Merenda

The mass evolution of a coronal mass ejection (CME) is an important parameter characterizing the drag force acting on a CME as it propagates through interplanetary space. Spacecraft measure in-situ plasma densities of CMEs during crossing…

太阳与恒星天体物理 · 物理学 2019-04-26 L. Holzknecht , M. Temmer , M. Dumbovic , S. Wellenzohn , K. Krikova , S. G. Heinemann , M. Rodari , B. Vrsnak , A. M. Veronig

Magnetism defines the complex and dynamic solar corona. Coronal mass ejections (CMEs) are thought to be caused by stresses, twists, and tangles in coronal magnetic fields that build up energy and ultimately erupt, hurling plasma into…

We present a statistical analysis of coronal mass ejections (CMEs) imaged by the Heliospheric Imager (HI) instruments aboard NASAs twin-spacecraft STEREO mission between April 2007 and August 2017 for STEREO-A and between April 2007 and…

Coronal mass ejections (CMEs) are solar eruptions of plasma and magnetic fields that significantly impact Space Weather, causing disruptions in technological systems and potential damage to power grids when directed towards Earth.…

太阳与恒星天体物理 · 物理学 2024-10-07 Shantanu Jain , Tatiana Podladchikova , Galina Chikunova , Karin Dissauer , Astrid M. Veronig

Since Coronal Mass Ejections (CMEs) are the major drivers of space weather, it is crucial to study their evolution starting from the inner corona. In this work we use Graduated Cylindrical Shell (GCS) model to study the 3D evolution of 59…

太阳与恒星天体物理 · 物理学 2020-08-12 Satabdwa Majumdar , Vaibhav Pant , Ritesh Patel , Dipankar Banerjee

Coronal Mass Ejections (CMEs) are large-scale eruptions from the Sun into interplanetary space. Despite being major space weather drivers, our knowledge of the CME properties in the inner heliosphere remains constrained by the scarcity of…

太阳与恒星天体物理 · 物理学 2021-05-12 Camilla Scolini , Sergio Dasso , Luciano Rodriguez , Andrei N. Zhukov , Stefaan Poedts

Coronal mass ejections (CMEs) are the most dynamic phenomena in our solar system. They abruptly disrupt the continuous outflow of solar wind by expelling huge clouds of magnetized plasma into interplanetary space with velocities enabling to…

太阳与恒星天体物理 · 物理学 2016-12-07 Manuela Temmer

Of all the activity observed on the Sun, two of the most energetic events are flares and Coronal Mass Ejections (CMEs). Usually, solar active regions that produce large flares will also produce a CME, but this is not always true (Yashiro et…

太阳与恒星天体物理 · 物理学 2016-04-25 Monica G. Bobra , Stathis Ilonidis

Context. We study two coronal mass ejections (CMEs) observed between April 1-2, 2019 by both the inner Wide-Field Imager for Parker Solar Probe (WISPR-I) and the inner heliospheric imager (HI-1) on board STEREO-A. This is the first study of…

太阳与恒星天体物理 · 物理学 2021-06-02 Carlos Roberto Braga , Angelos Vourlidas

Statistical dependencies among features of coronal mass ejections (CMEs), solar flares, and sigmoidal structures in soft-X-ray images were investigated. We applied analysis methods to all the features in the same way in order to investigate…

太阳与恒星天体物理 · 物理学 2018-12-26 Y. Kawabata , Y. Iida , T. Doi , S. Akiyama , S. Yashiro , T. Shimizu

We report on a comparison of the expansion speeds of limb coronal mass ejections (CMEs) between solar cycles 23 and 24. We selected a large number of limb CME events associated with soft X-ray flare size greater than or equal to M1.0 from…

太阳与恒星天体物理 · 物理学 2020-07-28 Fithanegest Kassa Dagnew , Nat Gopalswamy , Solomon Belay Tessema

The severe geomagnetic effects of solar storms or coronal mass ejections (CMEs) are to a large degree determined by their propagation direction with respect to Earth. There is a lack of understanding of the processes that determine their…

Accurate estimation of propagation characteristics of coronal mass ejections (CMEs) is crucial for predicting their geoeffectiveness. Stereoscopic techniques to study the kinematics of CMEs generally have been carried out using remote…

太阳与恒星天体物理 · 物理学 2026-02-19 Sandeep Kumar , Nandita Srivastava , Parthib Banerjee , Nat Gopalswamy

A new, automated method of detecting coronal mass ejections (CMEs) in three dimensions for the LASCO C2 and STEREO COR2 coronagraphs is presented. By triangulating isolated CME signal from the three coronagraphs over a sliding window of…

空间物理 · 物理学 2016-12-19 Joe Hutton , Huw Morgan

Coronal mass ejections (CMEs) are energetic expulsions of organized magnetic features from the Sun. The study of CME quasi-periodicity helps establish a possible relationship between CMEs, solar flares, and geomagnetic disturbances. We used…

太阳与恒星天体物理 · 物理学 2023-02-15 Xia Li , Hui Deng , Feng Wang , Linhua Deng , Ying Mei

In a space weather context, the most geoeffective coronal mass ejections (CMEs) are fast CMEs from Earth-facing solar active regions. These CMEs are difficult to characterize in coronagraph data due to their high speed (fewer observations),…

太阳与恒星天体物理 · 物理学 2025-03-04 Harshita Gandhi , Alexander James , Huw Morgan , Lucie Green

The statistical study of the Coronal Mass Ejections (CMEs) is a hot topic in solar physics. To further reveal the temporal and spatial behaviors of the CMEs at different latitudes and heights, we analyzed the correlation and phase…

太阳与恒星天体物理 · 物理学 2022-06-22 Jiaqi Lin , Feng Wang , Linhua Deng , Hui Deng , Ying Mei , Yangfan Xie

Interplanetary coronal mass ejections (ICMEs) have complex magnetic and density structures, which is the result of their interaction with the structured solar wind and with previous eruptions. ICMEs are revealed by in situ measurements and…

太阳与恒星天体物理 · 物理学 2011-06-06 N. Lugaz , I. I. Roussev