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We report on a numerical investigation of two coronal mass ejections (CMEs) which interact as they propagate in the inner heliosphere. We focus on the effect of the orientation of the CMEs relative to each other by performing four different…

空间物理 · 物理学 2015-06-17 N. Lugaz , C. J. Farrugia , W. B. Manchester , N. Schwadron

As a follow-up study on Sun-to-Earth propagation of fast coronal mass ejections (CMEs), we examine the Sun-to-Earth characteristics of slow CMEs combining heliospheric imaging and in situ observations. Three events of particular interest,…

太阳与恒星天体物理 · 物理学 2016-03-23 Ying D. Liu , Huidong Hu , Chi Wang , Janet G. Luhmann , John D. Richardson , Zhongwei Yang , Rui Wang

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…

空间物理 · 物理学 2019-02-20 Hengqiang Feng , Yan Zhao , Guoqing Zhao , Qiang Liu , Dejin Wu

We study dynamics of relativistic Coronal Mass Ejections (CMEs), from launching by shearing of foot-points (either slowly - the ``Solar flare'' paradigm, or suddenly - the ``star quake" paradigm), to propagation in the preceding magnetar…

高能天体物理现象 · 物理学 2023-08-14 Praveen Sharma , Maxim Barkov , Maxim Lyutikov

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…

太阳与恒星天体物理 · 物理学 2024-07-12 Philippe Lamy

Coronal mass ejections (CMEs) are the largest type of eruptions on the Sun and the main driver of severe space weather at the Earth. In this study, we implement a force-free spheromak CME description within 3-D magnetohydrodynamic…

太阳与恒星天体物理 · 物理学 2022-12-20 Gordon J. Koehn , Ravindra T. Desai , Emma E. Davies , Robert J. Forsyth , Jonathan P. Eastwood , Stefaan Poedts

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…

太阳与恒星天体物理 · 物理学 2022-04-22 Wageesh Mishra

Coronal mass ejections (CMEs) are large-scale ejections of magnetized plasma from the Sun and are associated with the most extreme space weather events. The geoeffectiveness of a CME is primarily determined by the southward component of its…

太阳与恒星天体物理 · 物理学 2024-07-09 Devojyoti Kansabanik , Angelos Voulidas

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…

太阳与恒星天体物理 · 物理学 2019-07-31 Nishtha Sachdeva

Coronal mass ejections (CMEs) play a decisive role in driving space weather, especially, the fast ones (e.g., with speeds above $800$~km~s$^{-1}$). Understanding the trigger mechanisms of fast CMEs can help us gaining important information…

太阳与恒星天体物理 · 物理学 2019-11-06 Peng Zou , Chaowei Jiang , Fengsi Wei , Pingbing Zuo , Yi Wang

The important role played by magnetic reconnection in the early acceleration of coronal mass ejections (CMEs) has been widely discussed. However, as CMEs may have expansion speeds comparable to their propagation speeds in the corona, it is…

太阳与恒星天体物理 · 物理学 2022-07-20 Bin Zhuang , Noé Lugaz , Manuela Temmer , Tingyu Gou , Nada Al-Haddad

Coronal Mass Ejections (CMEs), as they can inject a large amounts of mass and magnetic flux into the interplanetary space, are the primary source of space weather phenomena on the Earth. The present review first briefly introduces the solar…

太阳与恒星天体物理 · 物理学 2023-03-28 Wageesh Mishra , Luca Teriaca

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,…

太阳与恒星天体物理 · 物理学 2012-10-04 Maxim Lyutikov , Konstantinos Nektarios Gourgouliatos

Coronal mass ejections (CMEs) are spectacular ejections of material from the Sun as seen in the coronal field of view. Regular observations are possible with both ground-based and space-based coronagraphs. I present our current…

太阳与恒星天体物理 · 物理学 2015-05-13 Nandita Srivastava

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…

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…

地球与行星天体物理 · 物理学 2025-06-04 Sakshi Gupta , Souvik Roy , Dibyendu Nandy

Coronal Mass Ejections (CMEs) may have major importance for planetary and stellar evolution. Stellar CME parameters, such as mass and velocity, have yet not been determined statistically. So far only a handful of stellar CMEs has been…

太阳与恒星天体物理 · 物理学 2020-02-26 M. Leitzinger , P. Odert , R. Greimel , K. Vida , L. Kriskovics , E. W. Guenther , H. Korhonen , F. Koller , A. Hanslmeier , Zs. Kővári , H. Lammer

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…

太阳与恒星天体物理 · 物理学 2015-05-19 Angelos Vourlidas , Russ A. Howard , Ed Esfandiari , Spiros Patsourakos , Seiji Yashiro , Gregorz Michalek

Solar coronal mass ejections (CMEs) produce adverse space weather effects at Earth. Planets in the close habitable zone of magnetically active M dwarfs may experience more extreme space weather than at Earth, including frequent CME impacts…

太阳与恒星天体物理 · 物理学 2016-08-17 C. Kay , M. Opher , M. Kornbleuth

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…

太阳与恒星天体物理 · 物理学 2015-05-13 N. Gopalswamy , S. Akiyama , S. Yashiro , P. Makela