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We simulate a coronal mass ejection (CME) using a three-dimensional magnetohydrodynamic (MHD) code that includes coronal heating, thermal conduction, and radiative cooling in the energy equation. The magnetic flux distribution at 1 R$_s$ is…

太阳与恒星天体物理 · 物理学 2020-01-08 Katharine K. Reeves , Tibor Török , Zoran Mikić , Jon Linker , Nicholas A. Murphy

A three-dimensional numerical experiment of the launching of a hot and fast coronal jet followed by several violent eruptions is analyzed in detail. These events are initiated through the emergence of a magnetic flux rope from the solar…

太阳与恒星天体物理 · 物理学 2015-06-15 Fernando Moreno-Insertis , Klaus Galsgaard

Magnetic reconnection between open and closed magnetic field in the corona is believed to play a crucial role in the corona/heliosphere coupling. At large scale, the exchange of open/closed connectivity is expected to occur in…

太阳与恒星天体物理 · 物理学 2015-06-12 Sophie Masson , Patrick McCauley , Leon Golub , Katharine K. Reeves , Ed DeLuca

Multi-instrument observations of two filament eruptions on 24 February and 11 May 2011 suggest the following updated scenario for eruptive flare, CME and shock wave evolution. An initial destabilization of a filament results in stretching…

太阳与恒星天体物理 · 物理学 2014-11-05 V. V. Grechnev , A. M. Uralov , I. V. Kuzmenko , A. A. Kochanov , I. M. Chertok , S. S. Kalashnikov

An X3.4 solar flare and a fast halo coronal mass ejection (CME) occurred on 2006 December 13, accompanied by a high flux of energetic particles recorded both in near-Earth space and at ground level. Our purpose is to provide evidence of…

太阳与恒星天体物理 · 物理学 2013-05-27 C. Li , Y. Dai , J. -C. Vial , C. J. Owen , S. A. Matthews , Y. H. Tang , C. Fang , A. N. Fazakerley

We present results from 3D visco-resistive magnetohydrodynamic (MHD) simulations of the emergence of a convection zone magnetic flux tube into a solar atmosphere containing a pre-existing dipole coronal field, which is orientated to…

太阳与恒星天体物理 · 物理学 2015-06-17 James E. Leake , Mark G. Linton , Tibor Török

We investigate two successive flux rope (FR1 and FR2) eruptions resulting in two coronal mass ejections (CMEs) on 2012 January 23. Both FRs appeared as an EUV channel structure in the images of high temperature passbands of the Atmospheric…

太阳与恒星天体物理 · 物理学 2015-06-15 X. Cheng , J. Zhang , M. D. Ding , O. Olmedo , X. D. Sun , Y. Guo , Y. Liu

Using high time cadence images from the STEREO EUVI, COR1 and COR2 instruments, we derived detailed kinematics of the main acceleration stage for a sample of 95 CMEs in comparison with associated flares and filament eruptions. We found that…

太阳与恒星天体物理 · 物理学 2015-06-05 B. M. Bein , S. Berkebile-Stoiser , A. M. Veronig , M. Temmer , B. Vrsnak

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…

太阳与恒星天体物理 · 物理学 2023-10-11 Soumyaranjan Khuntia , Wageesh Mishra , Sudheer K Mishra , Yuming Wang , Jie Zhang , Shaoyu Lyu

We report on a study comparing coronal flux ropes inferred from eruption data with their interplanetary counterparts constructed from in situ data. The eruption data include the source-region magnetic field, post-eruption arcades, and…

太阳与恒星天体物理 · 物理学 2018-12-05 N. Gopalswamy , S. Akiyama , S. Yashiro , H. Xie

Magnetic flux emergence from the solar interior to the atmosphere is believed to be a key process of formation of solar active regions and driving solar eruptions. Due to the limited capability of observation, the flux emergence process is…

太阳与恒星天体物理 · 物理学 2023-01-04 Zhipeng Liu , Chaowei Jiang , Xueshang Feng , Pingbing Zuo , Yi Wang

Homologous coronal mass ejections (CMEs) are an interesting phenomenon, and it is possible to investigate the formation of CMEs by comparing multi-CMEs under a homologous physical condition. AR 11283 had been present on the solar surface…

太阳与恒星天体物理 · 物理学 2022-02-16 Rui Wang , Ying D. Liu , Shangbin Yang , Huidong Hu

Magnetic reconnection changes the magnetic field topology and powers explosive events in astrophysical, space and laboratory plasmas. For flares and coronal mass ejections (CMEs) in the solar atmosphere, the standard model predicts the…

太阳与恒星天体物理 · 物理学 2010-10-11 Rui Liu , Jeongwoo Lee , Tongjiang Wang , Guillermo Stenborg , Chang Liu , Haimin Wang

We present a comprehensive analysis of a particular class of coronal mass ejection (CME) event, called streamer-blowout CME (SBOs). The events are characterized by a gradual swelling of the overlying streamer, lasting hours to days,…

太阳与恒星天体物理 · 物理学 2018-07-25 Angelos Vourlidas , David F. Webb

We present an analysis of the formation of atmospheric flux ropes in a magnetohydrodynamic (MHD) solar flux emergence simulation. The simulation domain ranges from the top of the solar interior to the low corona. A twisted magnetic flux…

太阳与恒星天体物理 · 物理学 2015-06-17 David MacTaggart , Andrew Haynes

On 13 February 2009, a coronal wave -- CME -- dimming event was observed in quadrature by the STEREO spacecraft. We analyze this event using a three-dimensional, global magnetohydrodynamic (MHD) model for the solar corona. The numerical…

太阳与恒星天体物理 · 物理学 2014-11-20 Ofer Cohen , Gemma D. R. Attrill , Ward B. Manchester , Meredith J. Wills-Davey

We describe and analyze observations by the Solar Dynamics Observatory of the emergence of a small, bipolar active region within an area of unipolar magnetic flux that was surrounded by a circular, quiescent filament. Within only eight…

太阳与恒星天体物理 · 物理学 2018-08-08 Sally Dacie , Tibor Torok , Pascal Demoulin , Mark Linton , Cooper Downs , Lidia van Driel-Gesztelyi , David Long , James Leake

Small, impulsive jets commonly occur throughout the solar corona, but are especially visible in coronal holes. Evidence is mounting that jets are part of a continuum of eruptions that extends to much larger coronal mass ejections and…

太阳与恒星天体物理 · 物理学 2018-02-28 Pankaj Kumar , Judith T. Karpen , Spiro K. Antiochos , Peter F. Wyper , C. Richard DeVore , Craig E. DeForest

In this article, we present the multi-viewpoint and multi-wavelength analysis of an atypical solar jet based on the data from Solar Dynamics Observatory, SOlar, and Heliospheric Observatory, and Solar TErrestrial RElations Observatory. It…

太阳与恒星天体物理 · 物理学 2020-10-07 Reetika Joshi , Yuming Wang , Ramesh Chandra , Quanhao Zhang , Lijuan Liu , Xiaolei Li

We present the multi-wavelength observations of asymmetric filament eruption, associated CME and coronal downflows on 2012 June 17-18 during 20:00-05:00 UT. We use SDO/AIA, STEREO-B/SECCHI observations to understand the filament eruption…

太阳与恒星天体物理 · 物理学 2015-06-15 N. C. Joshi , A. K. Srivastava , B. Filippov , W. Uddin , P. Kayshap , R. Chandra