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Large-scale solar eruptive activities have a close relationship with coronal magnetic flux ropes. Previous numerical studies have found that the equilibrium of a coronal flux rope system could be disrupted if the axial magnetic flux of the…

太阳与恒星天体物理 · 物理学 2023-01-02 Quanhao Zhang , Xin Cheng , Rui Liu , Anchuan Song , Xiaolei Li , Yuming Wang

Coronal mass ejections (CMEs) are one of the primary manifestations of solar activity and can drive severe space weather effects. Therefore, it is vital to work towards being able to predict their occurrence. However, many aspects of CME…

太阳与恒星天体物理 · 物理学 2017-05-24 A. W. James , L. M. Green , E. Palmerio , G. Valori , H. A. S. Reid , D. Baker , D. H. Brooks , L. van Driel-Gesztelyi , E. K. J. Kilpua

Magnetic flux ropes are a key component of coronal mass ejections, forming the core of these eruptive phenomena. However, determining whether a flux rope is present prior to eruption onset and, if so, the rope's handedness and the number of…

Erupting magnetic flux ropes (MFRs) play a crucial role in producing solar flares. However, the formation of erupting MFRs in complex coronal magnetic configurations and their subsequent evolution in the flaring events are not fully…

太阳与恒星天体物理 · 物理学 2023-08-30 Avijeet Prasad , Sanjay Kumar , Alphonse C. Sterling , Ronald L. Moore , Guillaume Aulanier , R. Bhattacharyya , Qiang Hu

The eruptions of solar filaments often show rotational motion about their rising direction, but it remains elusive what mechanism governs such rotation and how the rotation is related to the initial morphology of the pre-eruptive filament…

太阳与恒星天体物理 · 物理学 2022-03-14 Zhenjun Zhou , Chaowei Jiang , Rui Liu , Yuming Wang , Lijuan Liu , Jun Cui

We propose a magnetic confinement nuclear fusion mechanism for the evolution of a solar flare in solar atmosphere. The mechanism agree with two observed characteristics of explosive flares and coronal mass ejections (CMEs) that have proved…

太阳与恒星天体物理 · 物理学 2020-03-11 Ying-Zhi Zhang

Magnetic flux ropes within interplanetary coronal mass ejections are often characterized as simplistic cylindrical or toroidal tubes with field lines that twist around the cylinder or torus axis. Recent multi-point observations suggest that…

太阳与恒星天体物理 · 物理学 2024-06-21 Andreas J. Weiss , Teresa Nieves-Chinchilla , Christian Möstl

Magnetic flux ropes are bundles of twisted magnetic field enveloping a central axis. They harbor free magnetic energy and can be progenitors of coronal mass ejections (CMEs), but identifying flux ropes on the Sun can be challenging. One of…

It is well known that solar flares have broad impacts on the low atmosphere, but it is largely unknown how they affect sunspot waves and oscillations. It is also under debate as to whether the flare-induced photospheric changes are due to…

太阳与恒星天体物理 · 物理学 2021-03-17 Wensi Wang , Rui Liu

Magnetic flux ropes (MFRs) are believed to be at the heart of solar coronal mass ejections (CMEs). A well-known example is the prominence cavity in the low corona that sometimes makes up a three-part white-light (WL) CME upon its eruption.…

太阳与恒星天体物理 · 物理学 2015-06-22 Bin Chen , Timothy S. Bastian , Dale E. Gary

Magnetic flux rope (MFR) is the core structure of the greatest eruptions, i.e., the coronal mass ejections (CMEs), on the Sun, and magnetic clouds are post-eruption MFRs in interplanetary space. There is a strong debate about whether or not…

太阳与恒星天体物理 · 物理学 2018-03-06 Yuming Wang , Chenglong Shen , Rui Liu , Jiajia Liu , Jingnan Guo , Xiaolei Li , Mengjiao Xu , Qiang Hu , Tielong Zhang

Solar eruptive events such as coronal mass ejections and eruptive flares are frequently associated with the emergence of magnetic flux from the convection zone into the corona. We use three dimensional magnetohydrodynamic numerical…

太阳与恒星天体物理 · 物理学 2022-07-27 James Leake , Mark Linton , Spiro Antiochos

Magnetic reconnection is essential to release the flux rope during its ejection. The question remains: how does the magnetic reconnection change the flux rope structure? Following the original study of \citet{Qiu2007}, we compare properties…

太阳与恒星天体物理 · 物理学 2014-09-30 Qiang Hu , Jiong Qiu , B. Dasgupta , A. Khare , G. M. Webb

Magnetic flux rope is believed to be an important structural component of coronal mass ejections (CMEs). While there exist much observational evidence of the flux rope after the eruption, e.g., as seen in remote-sensing coronagraph images…

太阳与恒星天体物理 · 物理学 2015-05-27 X. Cheng , J. Zhang , Y. Liu , M. D. Ding

Time-dependent resistive magnetohydrodynamic simulations are carried out to study a flux rope eruption caused by magnetic reconnection with implication in coexistent flare-CME (coronal mass ejection) events. An early result obtained in a…

天体物理学 · 物理学 2009-11-11 Y. Z. Zhang , J. X. Wang , Y. Q. Hu

Loss of equilibrium of magnetic flux ropes is a leading candidate for the origin of solar coronal mass ejections (CMEs). The aim of this paper is to explore to what extent this mechanism can account for the initiation of CMEs in the global…

太阳与恒星天体物理 · 物理学 2011-02-11 A. R. Yeates , D. H. Mackay

Combining the Solar Dynamics Observatory and the New Vacuum Solar Telescope observations, we study a confined flare triggered by a rising flux rope within the trailing sunspots of active region 12733. The flux rope lying above the sheared…

太阳与恒星天体物理 · 物理学 2019-06-19 Shuhong Yang , Jun Zhang , Qiao Song , Yi Bi , Ting Li

With the global view and high-cadence observations from SDO/AIA and STEREO, many spatially separated solar eruptive events appear to be coupled. However, the mechanisms for "sympathetic" events are still largely unknown. In this study, we…

太阳与恒星天体物理 · 物理学 2016-03-17 M. Jin , C. J. Schrijver , M. C. M. Cheung , M. L. DeRosa , N. V. Nitta , A. M. Title

An eruption event launched from solar active region (AR) NOAA 11719 is investigated based on coronal EUV observations and photospheric magnetic field measurements obtained from Solar Dynamic Observatory. The AR consists of a filament…

太阳与恒星天体物理 · 物理学 2015-06-23 P. Vemareddy , J. Zhang

We study a filament eruption, two-ribbon flare, and coronal mass ejection (CME) that occurred in Active Region NOAA 10898 on 6 July 2006. The filament was located South of a strong sunspot that dominated the region. In the evolution leading…

太阳与恒星天体物理 · 物理学 2014-01-14 Tibor Török , Manuela Temmer , Gherardo Valori , Astrid Veronig , Lidia van Driel-Gesztelyi , Bojan Vršnak