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In this paper, a generic self-similar flux rope model is proposed to probe the internal state of CMEs in order to understand the thermodynamic process and expansion of CMEs in interplanetary space. Using this model, three physical…

Solar and Stellar Astrophysics · Physics 2014-11-20 Yuming Wang , Jie Zhang , Chenglong Shen

Most earlier studies have been limited to estimating the kinematic evolution of coronal mass ejections (CMEs), and only limited efforts have been made to investigate their thermodynamic evolution. We focus on the interplay of the thermal…

Solar and Stellar Astrophysics · Physics 2024-11-07 Soumyaranjan Khuntia , Wageesh Mishra , Yuming Wang , Sudheer K Mishra , Teresa Nieves-Chinchilla , Shaoyu Lyu

Coronal Mass Ejections (CMEs) are the most energetic expulsions of magnetized plasma from the Sun that play a crucial role in space weather dynamics. This study investigates the diverse kinematics and thermodynamic evolution of two CMEs…

Solar and Stellar Astrophysics · Physics 2023-10-11 Soumyaranjan Khuntia , Wageesh Mishra , Sudheer K Mishra , Yuming Wang , Jie Zhang , Shaoyu Lyu

The thermodynamic evolution of Coronal Mass Ejections (CMEs) in the inner corona (< 1.5 R$_{sun}$) is not yet completely understood. In this work, we study the evolution of thermodynamic properties of a CME core observed in the inner corona…

Solar and Stellar Astrophysics · Physics 2023-01-31 Jyoti Sheoran , Vaibhav Pant , Ritesh Patel , Dipankar Banerjee

We investigate the Sun-Earth dynamics of a set of 38 well-observed Coronal Mass Ejections(CMEs) using data from the STEREO, SOHO missions and WIND instrument. We seek to quantify the relative contributions of Lorentz force and aerodynamic…

Solar and Stellar Astrophysics · Physics 2019-07-31 Nishtha Sachdeva

The arrival of a series of coronal mass ejections (CMEs) at the Earth resulted in a great geomagnetic storm on 10 May 2024, the strongest storm in the last two decades. We investigate the kinematic and thermal evolution of the successive…

Solar and Stellar Astrophysics · Physics 2025-04-07 Soumyaranjan Khuntia , Wageesh Mishra , Anjali Agarwal

The magnetic fields of interplanetary coronal mass ejections (ICMEs), which originate close to the Sun in the form of a flux rope, determine their geoeffectiveness. Therefore, robust flux rope-based models of CMEs are required to perform…

Space Physics · Physics 2020-06-24 Talwinder Singh , Tae K. Kim , Nikolai V. Pogorelov , Charles N. Arge

Solar coronal mass ejections (CMEs) are large-scale eruptions of plasma and magnetic field from the Sun into the corona and interplanetary space. They are the most significant drivers of adverse space weather at Earth and other locations in…

Solar and Stellar Astrophysics · Physics 2012-02-20 Jason P. Byrne

Solar coronal mass ejections (CMEs) show a large variety in their kinematic properties. CMEs originating in active regions and accompanied by strong flares are usually faster and accelerated more impulsively than CMEs associated with…

Astrophysics · Physics 2007-10-11 T. Toeroek , B. Kliem

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…

Solar and Stellar Astrophysics · Physics 2021-05-12 Camilla Scolini , Sergio Dasso , Luciano Rodriguez , Andrei N. Zhukov , Stefaan Poedts

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

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

Our knowledge of the properties of Coronal Mass Ejections (CMEs) in the inner heliosphere is constrained by the relative lack of plasma observations between Sun and 1 AU. In this work, we present a comprehensive catalog of 47 CMEs measured…

Space Physics · Physics 2020-05-06 T. M. Salman , R. M. Winslow , N. Lugaz

Some of the major challenges faced in understanding the early evolution of Coronal Mass Ejections (CMEs) are due to limited observations in the inner corona ($<\,3$ R$_{\odot}$) and the plane of sky measurements. In this work, we have thus…

Solar and Stellar Astrophysics · Physics 2022-04-20 Satabdwa Majumdar , Ritesh Patel , Vaibhav Pant

A fundamental property of coronal mass ejections (CMEs) is their radial expansion, which determines the increase in the CME radial size and the decrease in the CME magnetic field strength as the CME propagates. CME radial expansion can be…

Solar and Stellar Astrophysics · Physics 2023-07-19 Bin Zhuang , Noé Lugaz , Nada Al-Haddad , Réka M. Winslow , Camilla Scolini , Charles J. Farrugia , Antoinette B. Galvin

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

Understanding coronal mass ejection (CME) energetics and dynamics has been a long-standing problem, and although previous observational estimates have been made, such studies have been hindered by large uncertainties in CME mass. Here, the…

Solar and Stellar Astrophysics · Physics 2015-06-04 Eoin P. Carley , R. T. James McAteer , Peter T. Gallagher

Numerical models of the solar wind and coronal mass ejections (CMEs) utilize photospheric magnetic field observations to prescribe the inner boundary conditions for the plasma solutions. These magnetic field data are available to the…

Solar and Stellar Astrophysics · Physics 2026-02-03 Nishtha Sachdeva , Zhenguang Huang , Gabor Toth , Hongfan Chen , Ward B. Manchester , Bart van der Holst

Coronal mass ejections (CMEs) are complex magnetized plasma structures in which the magnetic field spirals around a central axis, forming what is known as a flux rope (FR). The central FR axis can be oriented at any angle to the ecliptic.…

Solar and Stellar Astrophysics · Physics 2024-08-28 Karmen Martinić , Eleanna Asvestari , Mateja Dumbović , Tobias Rindlisbacher , Manuela Temmer , Bojan Vršnak
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