Chaos-induced resistivity in different magnetic configurations

来源 :天文和天体物理学研究 | 被引量 : 0次 | 上传用户:zhaojie25
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
It is widely believed that magnetic reconnection plays an important role in various eruptive phenomena of space and astrophysical plasmas.The mechanism of anomalous resistivity,however,has been an open and unsolved problem.The chaos-induced resistivity proposed by Yoshida et al.is one of possible mechanisms for anomalous resistivity.By use of the test particle simulation,the present work studies the chaos-induced resistivity for different configurations of reconnection magnetic fields and its distribution in different chaos regions of reconnection current sheets.The results show that the chaos-induced resistivity can be 6-7 orders of magnitude higher than the classical Spitzer resistivity in the X-type chaos regions and 5 orders of magnitude in the O-type chaos regions.Moreover,in the X-type chaos regions the chaos-induced resistivity of the magnetized case is higher by a factor of 2 to 3 times than that of the unmagnetized case,but in the O-type chaos regions the chaos-induced resistivity of the magnetized case is close to or lower than that of the unmagnetized case.The present work is helpful to the understanding of the dynamics of reconnection current sheets,especially of the generation mechanism of the anomalous resistivity of collisionless reconnection regions.
其他文献
Thirty massive clumps associated with bright infrared sources were observed to detect the infall signatures and characterize infall properties in the envelope o
In this paper,we propose a long short-term memory (LSTM) deep learning model to deal with the smoothed monthly sunspot number (SSN),aiming to address the proble
We report the discovery of four new open clusters (named QC 1,QC 2,QC 3 and QC 4) in the direction of Cygnus Cloud and select their members based on five astrom
A sky model from CLEAN deconvolution is a particularly effective high dynamic range reconstruction in radio astronomy,which can effectively model the sky and re
At low temperatures (~10 K),hydrogen atoms can diffuse quickly on grain ice mantles and frequently encounter hydrogen molecules,which cover a notable fraction of
This paper reports results from the first long-term BV(RI)c photometric CCD observations of three variable pre-main-sequence stars collected during the period f
We present the observational results from a detailed timing analysis of the black hole candidate EXO 1846-031 during its outburst in 2019 with the observations
In this work,we train three decision-tree based ensemble machine learning algorithms (Random Forest Classifier,Adaptive Boosting and Gradient Boosting Decision
The first BV bands photometric observations and the low-resolution spectrum of the shortest period Am type eclipsing binary TYC 6408-989-1 have been obtained.Th
For lots of scientific questions about lunar physics deep inside the Moon,in-situ observation on lunar physical libration is one of the most potential ways.In t