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Coronal mass ejections (CMEs) are magnetized plasma systems with highly complex magnetic topology and evolution. Methods developed to assess their magnetic configuration have primarily focused on reconstructing three-dimensional…

Space Physics · Physics 2024-08-09 Nada Al-Haddad , Mitchell Berger

Investigating the heliospheric evolution and consequences of Coronal mass ejections (CMEs) is critical to understanding the solar-terrestrial relationship. For the first time, Heliospheric Imagers (HIs) onboard STEREO, providing multiple…

Solar and Stellar Astrophysics · Physics 2022-04-22 Wageesh Mishra

Coronal mass ejections (CMEs) are large-scale ejections of plasma and magnetic field from the solar corona, which propagate through interplanetary space at velocities of $\sim$100--2500~km~s$^{-1}$. Although plane-of-sky coronagraph…

Solar and Stellar Astrophysics · Physics 2011-06-09 Shane A. Maloney , Peter T. Gallagher

Owing to our dependance on spaceborne technology, an awareness of disturbances in the near-Earth space environment is proving to be increasingly crucial. Earth-directed Coronal mass ejections (CMEs) emanating from the Sun are the primary…

Solar and Stellar Astrophysics · Physics 2014-07-17 Arun Babu

In-situ measurements carried out by spacecraft in radial alignment are critical to advance our knowledge on the evolutionary behavior of coronal mass ejections (CMEs) and their magnetic structures during propagation through interplanetary…

Solar and Stellar Astrophysics · Physics 2021-08-11 Camilla Scolini , Reka M. Winslow , Noé Lugaz , Stefaan Poedts

Predicting the impacts of coronal mass ejections (CMEs) is a major focus of current space weather forecasting efforts. Typically, CME properties are reconstructed from stereoscopic coronal images and then used to forward model a CME's…

Solar and Stellar Astrophysics · Physics 2024-04-05 C. Kay , E. Palmerio

Understanding the evolution of radial sizes and instantaneous expansion speeds of coronal mass ejections (CMEs) is crucial for assessing their impact duration on Earth's environment. We introduce a non-conventional approach to derive the…

Solar and Stellar Astrophysics · Physics 2024-09-30 Anjali Agarwal , Wageesh Mishra

The diffuse morphology and transient nature of coronal mass ejections (CMEs) make them difficult to identify and track using traditional image processing techniques. We apply multiscale methods to enhance the visibility of the faint CME…

Solar and Stellar Astrophysics · Physics 2009-02-20 Jason P. Byrne , Peter T. Gallagher , R. T. James McAteer , C. Alex Young

We have studied two Coronal Mass Ejections (CMEs) that occurred on September 25 and 28, 2012 and interacted near the Earth. By fitting the Graduated Cylindrical Shell (GCS) model on the SECCHI/COR2 images and applying the Stereoscopic…

Solar and Stellar Astrophysics · Physics 2016-02-03 Wageesh Mishra , Nandita Srivastava , Talwinder Singh

Our study attempts to understand the collision characteristics of two coronal mass ejections (CMEs) launched successively from the Sun on 2013 October 25. The estimated kinematics, from three-dimensional (3D) reconstruction techniques…

Solar and Stellar Astrophysics · Physics 2016-11-09 Wageesh Mishra , Yuming Wang , Nandita Srivastava

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…

Solar and Stellar Astrophysics · Physics 2020-03-25 Hebe Cremades , Francisco A. Iglesias , Luciano A. Merenda

Forecasting the in situ properties of coronal mass ejections (CMEs) from remote images is expected to strongly enhance predictions of space weather, and is of general interest for studying the interaction of CMEs with planetary…

Coronal mass ejections (CMEs) stand as intense eruptions of magnetized plasma from the Sun, playing a pivotal role in driving significant changes of the heliospheric environment. Deducing the properties of CMEs from their progenitors in…

Solar and Stellar Astrophysics · Physics 2024-07-15 J. H. Guo , L. Linan , S. Poedts , Y. Guo , B. Schmieder , A. Lani , Y. W. Ni , M. Brchnelova , B. Perri , T. Baratashvili , S. T. Li , P. F. Chen

Previous survey studies reported that coronal mass ejections (CMEs) can exhibit various structures in white-light coronagraphs, and $\sim$30\% of them have the typical three-part feature in the high corona (e.g., 2--6 $R_\odot$), which has…

Solar and Stellar Astrophysics · Physics 2023-08-02 Hongqiang Song , Leping Li , Zhenjun Zhou , Lidong Xia , Xin Cheng , Yao Chen

In this paper, we analyze 91 coronal mass ejection (CME) events studied by Manoharan et al. (2004) and Gopalswamy and Xie (2008). These earth-directed CMEs are large (width $>$160$^\circ$) and cover a wide range of speeds ($\sim$120--2400…

Solar and Stellar Astrophysics · Physics 2015-05-20 P. K. Manoharan , A. Mujiber Rahman

Coronal mass ejections (CMEs) are intense solar explosive eruptions. CMEs are highly important players in solar-terrestrial relationships, and they have important consequences for major geomagnetic storms and energetic particle events. It…

Space Physics · Physics 2019-02-20 Hengqiang Feng , Yan Zhao , Guoqing Zhao , Qiang Liu , Dejin Wu

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…

Solar and Stellar Astrophysics · Physics 2020-08-12 Satabdwa Majumdar , Vaibhav Pant , Ritesh Patel , Dipankar Banerjee

Solar Coronal Mass Ejections (CMEs) are sometimes deflected during their propagation. This deflection may be the consequence of interaction between a CME and a coronal hole or the solar wind. We analyze 44 halo-CMEs whose deflection angle…

Solar and Stellar Astrophysics · Physics 2020-09-02 Jingjing Wang , J. Todd Hoeksema , Siqing Liu

The process by which the Sun affects the terrestrial environment on short timescales is predominately driven by the amount of magnetic reconnection between the solar wind and Earth's magnetosphere. Reconnection occurs most efficiently when…

Earth and Planetary Astrophysics · Physics 2015-06-19 N. P. Savani , A. Vourlidas , A. Szabo , M. L. Mays , I. G. Richardson , B. J. Thompson , A. Pulkkinen , R. Evans , T. Nieves-Chinchilla

Predicting the effects of a coronal mass ejection (CME) impact requires knowing if impact will occur, which part of the CME impacts, and its magnetic properties. We explore the relation between CME deflections and rotations, which change…

Space Physics · Physics 2018-01-31 C. Kay , N. Gopalswamy