Structure and Coalescence of Magnetopause Flux Ropes and Their Dependence on IMF Clock Angle: Three‐Dimensional Global Hybrid Simulations

2021 ◽  
Vol 126 (2) ◽  
Author(s):  
Jin Guo ◽  
San Lu ◽  
Quanming Lu ◽  
Yu Lin ◽  
Xueyi Wang ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Flux Ropes ◽  
Imf Clock Angle ◽  
Hybrid Simulations

Structure and Coalescence of Magnetopause Flux Ropes and Their Dependence on IMF Clock Angle: Three-Dimensional Global Hybrid Simulations

2021 ◽  
Author(s):  
Jin Guo ◽  
San Lu ◽  
Quanming Lu ◽  
Yu Lin ◽  
Xueyi Wang ◽  
...  
Keyword(s):  
Energy Transport ◽  
Three Dimensional ◽  
Helical Structure ◽  
Axial Direction ◽  
Core Field ◽  
Flux Ropes ◽  
Subsolar Point ◽  
Imf Clock Angle ◽  
The Imf ◽  
Hybrid Simulations

<p>Flux ropes are ubiquitous at Earth’s magnetopause and play important roles in energy transport between the solar wind and Earth’s magnetosphere. In this paper, structure and coalescence of the magnetopause flux ropes formed by multiple X line reconnection in cases with different southward interplanetary magnetic field (IMF) clock angles are investigated by using three-dimensional global hybrid simulations. As the IMF clock angle decreases from 180°, the axial direction of the flux ropes becomes tilted relative to the equatorial plane, the length of the flux ropes gradually increases, and core field within flux ropes is formed by the increase in the guide field. The flux ropes are formed mostly near the subsolar point and then move poleward towards cusps. The flux ropes can eventually enter the cusps, during which their helical structure collapses, their core field weakens gradually, and their axial length decreases. When the IMF clock angle is large (i.e., the IMF is predominantly southward), the flux ropes can coalesce and form new ones with larger diameter. The coalescence between flux ropes can occur both near the subsolar point when they are newly formed and away from the subsolar point (e.g., in the southern hemisphere) when they move towards cusps. However, when the IMF clock angle is small (≤ 135° ), we do not find coalescence between flux ropes.</p>

scholarly journals Stability and Dynamic Evolution of Three‐dimensional Flux Ropes

2006 ◽  
Vol 645 (1) ◽  
pp. 732-741 ◽  
Author(s):  
Joachim Birn ◽  
Terry G. Forbes ◽  
Michael Hesse
Keyword(s):  
Three Dimensional ◽  
Dynamic Evolution ◽  
Flux Ropes

scholarly journals Three-Dimensional Evolution of Erupted Flux Ropes from the Sun (2 – 20 R ⊙) to 1 AU

Solar Physics ◽  
2013 ◽  
Vol 284 (1) ◽  
pp. 203-215 ◽  
Author(s):  
A. Isavnin ◽  
A. Vourlidas ◽  
E. K. J. Kilpua
Keyword(s):  
Three Dimensional ◽  
The Sun ◽  
Flux Ropes

scholarly journals A three-dimensional model of spiral null pair to form ion-scale flux ropes in magnetic reconnection region observed by Cluster

2019 ◽  
Vol 26 (11) ◽  
pp. 112901
Author(s):  
Ruilong Guo ◽  
Zuyin Pu ◽  
Zhonghua Yao ◽  
Malcolm Dunlop ◽  
Yulia V. Bogdanova ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Three Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Reconnection Region ◽  
Flux Ropes ◽  
Null Pair

THREE-DIMENSIONAL RECONNECTION INVOLVING MAGNETIC FLUX ROPES

2012 ◽  
Vol 753 (2) ◽  
pp. 131 ◽  
Author(s):  
W. Gekelman ◽  
E. Lawrence ◽  
B. Van Compernolle
Keyword(s):  
Magnetic Flux ◽  
Three Dimensional ◽  
Magnetic Flux Ropes ◽  
Flux Ropes
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