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Context. We study two coronal mass ejections (CMEs) observed between April 1-2, 2019 by both the inner Wide-Field Imager for Parker Solar Probe (WISPR-I) and the inner heliospheric imager (HI-1) on board STEREO-A. This is the first study of…

太阳与恒星天体物理 · 物理学 2021-06-02 Carlos Roberto Braga , Angelos Vourlidas

On 8 November 2013 a halo-type coronal mass ejection (CME) was observed, together with flares and type II radio bursts, but the association between the flares, radio bursts, and the CME was not clear. Our aim is to identify the origin of…

太阳与恒星天体物理 · 物理学 2023-10-10 Silja Pohjolainen , Nasrin Talebpour Sheshvan , Christian Monstein

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…

太阳与恒星天体物理 · 物理学 2015-06-04 Eoin P. Carley , R. T. James McAteer , Peter T. Gallagher

Coronal mass ejections (CMEs) are the primary sources of intense disturbances at Earth, where their geo-effectiveness is largely determined by their dynamic pressure and internal magnetic field, which can be significantly altered during…

Intense solar energetic particle (SEP) events data, associated with ground level enhancements (GLEs), occurred during 1989 to 2006 have been obtained from the spectrometers on board GOES spacecraft in the energy range 10-100 MeV. The…

太阳与恒星天体物理 · 物理学 2017-08-02 P. K. Manoharan , G. Agalya

We report the results of the first state-of-the-art numerical simulations of Coronal Mass Ejections (CMEs) taking place in realistic magnetic field configurations of moderately active M-dwarf stars. Our analysis indicates that a clear,…

Intervals of enhanced turbulent fluctuations are typically less frequent within the magnetic cloud region of an interplanetary coronal mass ejection (ICME). We investigate two such intervals inside an ICME observed by the \textit{Wind}…

Interplanetary coronal mass ejections (ICMEs) are major drivers of heliospheric variability and can produce prolonged disturbances near Earth. Understanding their thermodynamic evolution is crucial for assessing their heat budget and…

太阳与恒星天体物理 · 物理学 2025-12-18 Soumyaranjan Khuntia , Wageesh Mishra

One of the most prominent sources for energetic particles in our solar system are huge eruptions of magnetised plasma from the Sun called coronal mass ejections (CMEs), which usually drive shocks that accelerate charged particles up to…

太阳与恒星天体物理 · 物理学 2023-12-13 D. E. Morosan , J. Pomoell , C. Palmroos , N. Dresing , E. Asvestari , R. Vainio , E. K. J. Kilpua , J. Gieseler , A. Kumari , I. C. Jebaraj

An unexpected strong geomagnetic storm occurred on 2018 August 26, which was caused by a slow coronal mass ejection (CME) from a gradual eruption of a large quiet-region filament. We investigate the eruption and propagation characteristics…

太阳与恒星天体物理 · 物理学 2019-11-06 Chong Chen , Ying D. Liu , Rui Wang , Xiaowei Zhao , Huidong Hu , Bei Zhu

Coronal Mass Ejections (CMEs) influence the interplanetary environment over vast distances in the solar system by injecting huge clouds of fast solar plasma and energetic particles (SEPs). A number of fundamental questions remain about how…

太阳与恒星天体物理 · 物理学 2022-06-01 Oleg Stepanyuk , Kamen Kozarev , Mohamed Nedal

The scenario of twin coronal mass ejections (CMEs), i.e., a fast and wide primary CME (priCME) preceded by previous CMEs (preCMEs), has been found to be favorable to a more efficient particle acceleration in large solar energetic particle…

太阳与恒星天体物理 · 物理学 2021-11-03 Bin Zhuang , Noé Lugaz , Tingyu Gou , Liuguan Ding

We present observations and modeling of the magnetic field configuration, morphology, and dynamics of a large-scale, high-latitude filament eruption observed by the Solar Dynamics Observatory. We analyze the 2015 July 9-10 filament eruption…

We report observations of homologous coronal jets and their coronal mass ejections (CMEs) observed by instruments onboard the Solar Dynamics Observatory (SDO) and Solar and Heliospheric Observatory (SOHO) spacecraft. The homologous jets…

太阳与恒星天体物理 · 物理学 2016-05-25 Navdeep K. Panesar , Alphonse C. Sterling , Ronald L. Moore

Counterstreaming beams of electrons are ubiquitous in coronal mass ejections (CMEs) - although their existence is not unanimously accepted as a necessary and/or sufficient signature of these events. We continue the investigations of a…

太阳与恒星天体物理 · 物理学 2015-06-19 M. Lazar , J. Pomoell , S. Poedts , C. Dumitrache , N. A. Popescu

Coronal dimmings associated with coronal mass ejections (CME) from the Sun have gained much attention since the late 1990s when they were first observed in high-cadence imagery of the SOHO/EIT and Yohkoh/SXT instruments. They appear as…

A high-speed halo-type coronal mass ejection (CME), associated with a GOES M4.6 soft X-ray flare in NOAA AR 0180 at S12W29 and an EIT wave and dimming, occurred on 9 November 2002. A complex radio event was observed during the same period.…

天体物理学 · 物理学 2008-01-21 N. J. Lehtinen , S. Pohjolainen , K. Huttunen-Heikinmaa , E. Valtonen , R. Vainio , A. E. Hillaris

We perform a numerical study of the evolution of a Coronal Mass Ejection (CME) and its interaction with the coronal magnetic field based on the May 12, 1997, CME event using a global MagnetoHydroDynamic (MHD) model for the solar corona. The…

太阳与恒星天体物理 · 物理学 2015-05-19 O. Cohen , G. D. R. Attrill , N. A. Schwadron , N. U. Crooker , M. J. Owens , C. Downs , T. I. Gombosi

We carry out a numerical simulation depicting the effects of a Coronal Mass Ejection (CME) event on a close-in giant planet in an extrasolar system. We drive the CME in a similar manner as in simulations of space weather events on Earth.…

太阳与恒星天体物理 · 物理学 2015-05-27 O. Cohen , V. L. Kashyap , J. J. Drake , I. V. Sokolov , T. I. Gombosi

We report on the parallel analysis of the periodic behaviour of coronal mass ejections (CMEs) based on 21 years [1996 -- 2016] of observations with the SOHO/LASCO--C2 coronagraph, solar flares, prominences, and several proxies of solar…

太阳与恒星天体物理 · 物理学 2018-08-15 Tatiana Barlyaeva , Julien Wojak , Philippe Lamy , Brice Boclet , Imre Toth