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We present several models of the magnetic structure of solar coronal mass ejections (CMEs). First, we model CMEs as expanding force-free magnetic structures. While keeping the internal magnetic field structure of the stationary solutions,…

Solar and Stellar Astrophysics · Physics 2012-10-04 Maxim Lyutikov , Konstantinos Nektarios Gourgouliatos

We analyze the detection capability of Coronal Mass Ejections (CMEs) for all currently operating coronagraphs in space. We define as CMEs events that propagate beyond 10 solar radii with morphologies broadly consistent with a magnetic flux…

Solar and Stellar Astrophysics · Physics 2020-08-11 Angelos Vourlidas , L. A. Balmaceda , H. Xie , O. C. St. Cyr

Solar coronal jets have been observed in detail since the early 1990s. While it is clear that these jets are magnetically driven, the details of the driving process has recently been updated. Previously it was suspected that the jets were a…

Solar and Stellar Astrophysics · Physics 2019-12-06 Alphonse C. Sterling

Coronal mass ejections (CMEs) are a prominent contributor to solar system space weather and might have impacted the Sun's early angular momentum evolution. A signal diagnostic of CMEs on the Sun is coronal dimming: a drop in coronal…

The physical processes or trigger mechanisms that lead to the eruption of coronal mass ejections (CMEs), the largest eruptive phenomenon in the heliosphere, are still undetermined. Low-altitude magnetic reconnection associated with flux…

Solar and Stellar Astrophysics · Physics 2018-10-17 S. L. Yardley , L. M. Green , L. Van Driel-Gesztelyi , D. R. Williams , D. H. Mackay

The LASCO coronagraphs, in continuous operation since 1995, have observed the evolution of the solar corona and coronal mass ejections (CMEs) over a full solar cycle with high quality images and regular cadence. This is the first time that…

Solar and Stellar Astrophysics · Physics 2015-05-19 Angelos Vourlidas , Russ A. Howard , Ed Esfandiari , Spiros Patsourakos , Seiji Yashiro , Gregorz Michalek

Observations of the solar corona with the Large Angle Spectrometric Coronograph (LASCO) and Extreme ultraviolet Imaging Telescope (EIT) instruments on the Solar and Heliospheric Observatory (SOHO) provide an unprecedented opportunity to…

Astrophysics · Physics 2009-11-06 Prasad Subramanian , K. P. Dere

The solar wind drag-based model is a widely used framework for predicting the propagation of Coronal Mass Ejections (CMEs) through interplanetary space. This model primarily considers the aerodynamic drag exerted by the solar wind on CMEs.…

Solar and Stellar Astrophysics · Physics 2025-02-19 Mattia Rossi , Sabrina Guastavino , Michele Piana , Anna Maria Massone

Coronal Mass Ejections (CMEs) are energetic storms in the Sun that result in the ejection of large-scale magnetic clouds (MCs) in interplanetary space that contain enhanced magnetic fields with coherently changing field direction. The…

Solar and Stellar Astrophysics · Physics 2022-11-09 Sanchita Pal , Dibyendu Nandy , Emilia K J Kilpua

We identify coronal mass ejections (CMEs) associated with magnetic clouds (MCs) observed near Earth by the Wind spacecraft from 2008 to mid-2012, a time period when the two STEREO spacecraft were well positioned to study Earth-directed…

Type II radio bursts are the indicator of adverse space weather in a stellar system. These radio bursts are the consequence of shock wave acceleration due to the coronal mass ejection (CME). In this study, we conduct a series of…

Earth and Planetary Astrophysics · Physics 2025-05-02 Soumitra Hazra , Ofer Cohen , Igor V. Sokolov

In this contribution to the panel discussion of the IAU Symposium 388 "Solar and Stellar Coronal Mass Ejections", I concentrate on white-light observations of solar coronal mass ejections (CMEs) from space and specifically address the…

Solar and Stellar Astrophysics · Physics 2024-07-12 Philippe Lamy

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 shape and dynamics of coronal mass ejections (CMEs) vary significantly based on the instrument and wavelength used. This has led to significant debate about the proper definitions of CME/shock fronts, pile-up/compression regions, and…

Solar and Stellar Astrophysics · Physics 2025-08-27 Oleg Stepanyuk , Kamen Kozarev

The free energy that is dissipated in a magnetic reconnection process of a solar flare, generally accompanied by a coronal mass ejection (CME), has been considered as the ultimate energy source of the global energy budget of solar flares in…

Solar and Stellar Astrophysics · Physics 2019-06-19 Markus J. Aschwanden , Nat Gopalswamy

We present a statistical study of dynamical and kinetic characteristics of CMEs which show temporal and spatial association with flares and type II radio bursts or complex radio events of type II bursts and type IV continua. This study is…

Solar and Stellar Astrophysics · Physics 2010-09-24 M. Georgiou , E. Mitsakou , G. Pothitakis , A. Hillaris , P. Preka-Papadema , X. Moussas

Context: Metric type II bursts are the most direct diagnostic of shock waves in the solar corona. Aims: There are two main competing views about the origin of coronal shocks: that they originate in either blast waves ignited by the pressure…

Solar and Stellar Astrophysics · Physics 2015-05-28 A. Nindos , C. E. Alissandrakis , A. Hillaris , P. Preka-Papadema

We analyze a coronal mass ejection (CME) which resulted from an intense flare in active region AR486 on November 4, 2003. The CME propagation and speed are studied with interplanetary scintillation images, near-Earth space mission data, and…

Solar and Stellar Astrophysics · Physics 2015-05-13 M. Lahkar , P. K. Manoharan , K. Mahalakshmi , K. Prabhu , G. Agalya , S. Shaheda Begum , P. Revathi

Exoplanetary and planetary environments are forced by stellar activity which manifest through variable radiation, particle and magnetic fluxes, stellar winds, flares and magnetic storms known as coronal mass ejections (CMEs). Recent studies…

Earth and Planetary Astrophysics · Physics 2025-06-04 Sakshi Gupta , Souvik Roy , Dibyendu Nandy

Coronal mass ejections (CMEs) are large-scale eruptions of plasma and magnetic feld that can produce adverse space weather at Earth and other locations in the Heliosphere. Due to the intrinsic multiscale nature of features in coronagraph…

Solar and Stellar Astrophysics · Physics 2011-04-25 Peter T. Gallagher , C. Alex Young , Jason P. Byrne , R. T. James McAteer
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