scholarly journals Magnetic reconnection during eruptive magnetic flux ropes

2017 ◽  
Vol 604 ◽  
pp. L7 ◽  
Author(s):  
Z. X. Mei ◽  
R. Keppens ◽  
I. I. Roussev ◽  
J. Lin
Keyword(s):  
Magnetic Flux ◽  
Magnetic Reconnection ◽  
Magnetic Flux Ropes ◽  
Flux Ropes

Interaction of Magnetic Flux Ropes Via Magnetic Reconnection Observed at the Magnetopause

2017 ◽  
Vol 122 (10) ◽  
pp. 10,436-10,447 ◽  
Author(s):  
Rongsheng Wang ◽  
Quanming Lu ◽  
Rumi Nakamura ◽  
Wolfgang Baumjohann ◽  
C. T. Russell ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Magnetic Reconnection ◽  
Magnetic Flux Ropes ◽  
Flux Ropes

scholarly journals Observations of magnetic flux ropes during magnetic reconnection in the Earth's magnetotail

2012 ◽  
Vol 30 (5) ◽  
pp. 761-773 ◽  
Author(s):  
A. L. Borg ◽  
M. G. G. T. Taylor ◽  
J. P. Eastwood
Keyword(s):  
Magnetic Flux ◽  
Magnetic Reconnection ◽  
Electron Flux ◽  
Energetic Electron ◽  
Flux Rope ◽  
Clear Correlation ◽  
Particle Measurements ◽  
Magnetic Flux Ropes ◽  
Flux Ropes ◽  
Show Evidence

Abstract. We present an investigation of magnetic flux ropes observed by the four Cluster spacecraft during periods of magnetic reconnection in the Earth's magnetotail. Using a list of 21 Cluster encounters with the reconnection process in the period 2001–2006 identified in Borg et al. (2012), we present the distribution and characteristics of the flux ropes. We find 27 flux ropes embedded in the reconnection outflows of only 11 of the 21 reconnection encounters. Reconnection processes associated with no flux rope observations were not distinguishable from those where flux ropes were observed. Only 7 of the 27 flux ropes show evidence of enhanced energetic electron flux above 50 keV, and there was no clear signature of the flux rope in the thermal particle measurements. We found no clear correlation between the flux rope core field and the prevailing IMF By direction.

scholarly journals Asymmetry in the current sheet and secondary magnetic flux ropes during guide field magnetic reconnection

2012 ◽  
Vol 117 (A7) ◽  
pp. n/a-n/a ◽  
Author(s):  
Rongsheng Wang ◽  
Rumi Nakamura ◽  
Quanming Lu ◽  
Aimin Du ◽  
Tielong Zhang ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Magnetic Reconnection ◽  
Current Sheet ◽  
Magnetic Flux Ropes ◽  
Guide Field ◽  
Flux Ropes

scholarly journals Non-Gaussianity and cross-scale coupling in interplanetary magnetic field turbulence during a rope–rope magnetic reconnection event

2018 ◽  
Vol 36 (2) ◽  
pp. 497-507 ◽  
Author(s):  
Rodrigo A. Miranda ◽  
Adriane B. Schelin ◽  
Abraham C.-L. Chian ◽  
José L. Ferreira
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Magnetic Reconnection ◽  
Coherent Structures ◽  
Flux Rope ◽  
Inertial Subrange ◽  
Order Moment ◽  
Magnetic Flux Ropes ◽  
Flux Ropes ◽  
Non Gaussian

Abstract. In a recent paper (Chian et al., 2016) it was shown that magnetic reconnection at the interface region between two magnetic flux ropes is responsible for the genesis of interplanetary intermittent turbulence. The normalized third-order moment (skewness) and the normalized fourth-order moment (kurtosis) display a quadratic relation with a parabolic shape that is commonly observed in observational data from turbulence in fluids and plasmas, and is linked to non-Gaussian fluctuations due to coherent structures. In this paper we perform a detailed study of the relation between the skewness and the kurtosis of the modulus of the magnetic field |B| during a triple interplanetary magnetic flux rope event. In addition, we investigate the skewness–kurtosis relation of two-point differences of |B| for the same event. The parabolic relation displays scale dependence and is found to be enhanced during magnetic reconnection, rendering support for the generation of non-Gaussian coherent structures via rope–rope magnetic reconnection. Our results also indicate that a direct coupling between the scales of magnetic flux ropes and the scales within the inertial subrange occurs in the solar wind. Keywords. Space plasma physics (turbulence)

Direct evidence of secondary reconnection inside filamentary currents of magnetic flux ropes in magnetic reconnection

2020 ◽  
Author(s):  
Shimou Wang ◽  
Quanming Lu
Keyword(s):  
Energy Dissipation ◽  
Magnetic Flux ◽  
Magnetic Reconnection ◽  
Current Sheet ◽  
Magnetic Energy ◽  
Flux Rope ◽  
Plasma Jets ◽  
Magnetic Flux Ropes ◽  
Flux Ropes ◽  
Reconnecting Current Sheet

<p>Magnetic reconnection is a fundamental plasma process, by which magnetic energy is explosively released in the current sheet to energize charged particles and to create bi-directional Alfvénic plasma jets. A long-outstanding issue is how the stored magnetic energy is rapidly released in the process. Numerical simulations and observations show that formation and interaction of magnetic flux ropes dominate the evolution of the reconnecting current sheet. Accordingly, most volume of the reconnecting current sheet is occupied by the flux ropes and energy dissipation primarily occurs along their edges via the flux rope coalescence. Here, for the first time, we present in-situ evidence of magnetic reconnection inside the filamentary currents which was driven possibly by electron vortices inside the flux ropes. Our results reveal an important new way for energy dissipation in magnetic reconnection.</p>

scholarly journals SIGNATURES OF MAGNETIC RECONNECTION AT BOUNDARIES OF INTERPLANETARY SMALL-SCALE MAGNETIC FLUX ROPES

2010 ◽  
Vol 720 (1) ◽  
pp. 454-464 ◽  
Author(s):  
Hui Tian ◽  
Shuo Yao ◽  
Qiugang Zong ◽  
Jiansen He ◽  
Yu Qi
Keyword(s):  
Magnetic Flux ◽  
Magnetic Reconnection ◽  
Small Scale ◽  
Magnetic Flux Ropes ◽  
Flux Ropes

scholarly journals Electrostatic and electromagnetic fluctuations detected inside magnetic flux ropes during magnetic reconnection

2016 ◽  
Vol 121 (10) ◽  
pp. 9473-9482 ◽  
Author(s):  
Rongsheng Wang ◽  
Quanming Lu ◽  
Rumi Nakamura ◽  
Can Huang ◽  
Xing Li ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Magnetic Reconnection ◽  
Magnetic Flux Ropes ◽  
Flux Ropes

Observations of Electron‐Only Magnetic Reconnection Associated With Macroscopic Magnetic Flux Ropes

2020 ◽  
Vol 47 (19) ◽  
Author(s):  
H. Y. Man ◽  
M. Zhou ◽  
Y. Y. Yi ◽  
Z. H. Zhong ◽  
A. M. Tian ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Magnetic Reconnection ◽  
Magnetic Flux Ropes ◽  
Flux Ropes

scholarly journals Three-dimensional magnetic reconnection in particle-in-cell simulations of anisotropic plasma turbulence

2021 ◽  
Vol 87 (3) ◽  
Author(s):  
Jeffersson A. Agudelo Rueda ◽  
Daniel Verscharen ◽  
Robert T. Wicks ◽  
Christopher J. Owen ◽  
Georgios Nicolaou ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Magnetic Reconnection ◽  
Three Dimensional ◽  
Small Scale ◽  
Particle In Cell ◽  
Magnetic Flux Ropes ◽  
Simulation Domain ◽  
Initial Anisotropy ◽  
Flux Ropes ◽  
Turbulent Cascade

We use three-dimensional (3-D) fully kinetic particle-in-cell simulations to study the occurrence of magnetic reconnection in a simulation of decaying turbulence created by anisotropic counter-propagating low-frequency Alfvén waves consistent with critical-balance theory. We observe the formation of small-scale current-density structures such as current filaments and current sheets as well as the formation of magnetic flux ropes as part of the turbulent cascade. The large magnetic structures present in the simulation domain retain the initial anisotropy while the small-scale structures produced by the turbulent cascade are less anisotropic. To quantify the occurrence of reconnection in our simulation domain, we develop a new set of indicators based on intensity thresholds to identify reconnection events in which both ions and electrons are heated and accelerated in 3-D particle-in-cell simulations. According to the application of these indicators, we identify the occurrence of reconnection events in the simulation domain and analyse one of these events in detail. The event is related to the reconnection of two flux ropes, and the associated ion and electron exhausts exhibit a complex 3-D structure. We study the profiles of plasma and magnetic-field fluctuations recorded along artificial-spacecraft trajectories passing near and through the reconnection region. Our results suggest the presence of particle heating and acceleration related to small-scale reconnection events within magnetic flux ropes produced by the anisotropic Alfvénic turbulent cascade in the solar wind. These events are related to current structures of the order of a few ion inertial lengths in size.

scholarly journals Coalescence of magnetic flux ropes in the ion diffusion region of magnetic reconnection

2015 ◽  
Vol 12 (3) ◽  
pp. 263-267 ◽  
Author(s):  
Rongsheng Wang ◽  
Quanming Lu ◽  
Rumi Nakamura ◽  
Can Huang ◽  
Aimin Du ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Magnetic Reconnection ◽  
Diffusion Region ◽  
Ion Diffusion ◽  
Magnetic Flux Ropes ◽  
Flux Ropes
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