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In this paper we present a statistical study of the kinematics of 28894 coronal mass ejections (CMEs) recorded by the Large Angle and Spectrometric Coronagraph (LASCO) on board the Solar and Heliospheric Observatory spacecraft from 1996…

太阳与恒星天体物理 · 物理学 2020-10-07 Anitha Ravishankar , Grzegorz Michalek , Seiji Yashiro

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…

太阳与恒星天体物理 · 物理学 2011-06-09 Shane A. Maloney , Peter T. Gallagher

We report on 49 fast-mode forward shocks propagating inside coronal mass ejections (CMEs) as measured by Wind and ACE at 1 AU from 1997 to 2006. Compared to typical CME-driven shocks, these shocks propagate in different upstream conditions,…

空间物理 · 物理学 2015-06-03 N. Lugaz , C. J. Farrugia , C. W. Smith , K. Paulson

Coronal mass ejections (CMEs) are large-scale eruptions of plasma from the coronae of stars. Understanding the plasma processes involved in CME initiation has applications to space weather forecasting and laboratory plasma experiments.…

太阳与恒星天体物理 · 物理学 2018-03-21 Alexander W. James , Gherardo Valori , Lucie M. Green , Yang Liu , Mark C. M. Cheung , Yang Guo , Lidia van Driel-Gesztelyi

Halo coronal mass ejections (CMEs) were found to be significantly faster than normal CMEs, which was a long-standing puzzle. In order to solve the puzzle, we first investigate the observed properties of 31 limb CMEs that display clearly…

太阳与恒星天体物理 · 物理学 2015-05-18 Q. M. Zhang , Y. Guo , P. F. Chen , M. D. Ding , C. Fang

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…

太阳与恒星天体物理 · 物理学 2022-11-09 Sanchita Pal , Dibyendu Nandy , Emilia K J Kilpua

To improve the forecasting capability of impactful solar energetic particle (SEP) events, the relation between coronal mass ejections (CMEs) and SEP events needs to be better understood. Here we present a statistical study of SEP…

太阳与恒星天体物理 · 物理学 2020-09-09 Kosuke Kihara , Yuwei Huang , Nobuhiko Nishimura , Nariaki V. Nitta , Seiji Yashiro , Kiyoshi Ichimoto , Ayumi Asai

The radial expansion of coronal mass ejections (CMEs) is known to occur from remote observations; from the variation of their properties with radial distance; and from local in situ plasma measurements showing a decreasing speed profile…

空间物理 · 物理学 2020-08-26 N. Lugaz , T. M. Salman , R. M. Winslow , N. Al-Haddad , C. J. Farrugia , B. Zhuang , A. B. Galvin

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…

太阳与恒星天体物理 · 物理学 2009-02-20 Jason P. Byrne , Peter T. Gallagher , R. T. James McAteer , C. Alex Young

We present our results on the correlation of non-interacting coronal mass ejections (CMEs) and solar energetic particles (SEPs). A statistical analysis was conducted on 25 SEP events and the associated CME and flare during the ascending…

太阳与恒星天体物理 · 物理学 2020-10-06 Anitha Ravishankar , Grzegorz Michalek

Coronal mass ejections (CME) occur when long-lived magnetic flux ropes (MFR) anchored to the solar surface destabilize and erupt away from the Sun. This destabilization is often described in terms of an ideal magnetohydrodynamic (MHD)…

We study the association of solar flares with coronal mass ejections (CMEs) during the deep, extended solar minimum of 2007-2009, using extreme-ultraviolet (EUV) and white-light (coronagraph) images from the {\it Solar Terrestrial Relations…

太阳与恒星天体物理 · 物理学 2015-06-16 N. V. Nitta , M. J. Aschwanden , S. L. Freeland , J. R. Lemen , J. -P. Wülser , D. M. Zarro

Coronal mass ejections (CMEs) are eruptive events that cause a solar-type star to shed mass and magnetic flux. CMEs tend to occur together with flares, radio storms, and bursts of energetic particles. On the Sun, CME-related mass loss is…

太阳与恒星天体物理 · 物理学 2017-05-24 Steven R. Cranmer

White light images of Coronal Mass Ejections (CMEs) are projections on the plane-of-sky (POS). As a result, CME kinematics are subject to projection effects. The error in the true (deprojected) speed of CMEs is one of the main causes of…

太阳与恒星天体物理 · 物理学 2020-12-14 Evangelos Paouris , Angelos Vourlidas , Athanasios Papaioannou , Anastasios Anastasiadis

Researchers have reported (i) correlations of coronal mass ejection (CME) speeds and the total photospheric magnetic flux swept out by flare ribbons in flare-associated eruptive events, and, separately, (ii) correlations of CME speeds and…

太阳与恒星天体物理 · 物理学 2017-01-25 Minda Deng , Brian T. Welsch

Coronal mass ejections (CMEs) are more energetic than any other class of solar phenomena. They arise from the rapid release of up to $10^{33}$ erg of magnetic energy mainly in the form of particle acceleration and bulk plasma motion. Their…

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…

太阳与恒星天体物理 · 物理学 2012-02-20 Jason P. Byrne

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

We present results from a set of numerical simulations aimed at exploring the mechanism of coronal mass ejection (CME) suppression in active stars by an overlying large-scale magnetic field. We use a state-of-the-art 3D magnetohydrodynamic…

太阳与恒星天体物理 · 物理学 2018-08-08 Julián D. Alvarado-Gómez , Jeremy J. Drake , Ofer Cohen , Sofia P. Moschou , Cecilia Garraffo

Coronal mass ejections (CMEs) are the primary drivers of severe space weather disturbances in the heliosphere. Models of CME dynamics have been proposed that do not fully include the effects of magnetic reconnection on the forces driving…

太阳与恒星天体物理 · 物理学 2018-07-20 Brian T. Welsch