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Magnetic Reconnection in Strongly Magnetized Regions of the Low Solar Chromosphere
Ni L(倪蕾)1,2; Lukin, Vyacheslav S.3; Murphy, Nicholas A.4; Lin J(林隽)1,2; Ni, Lei(Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650216, Yunnan, Peoples R China)
发表期刊ASTROPHYSICAL JOURNAL
2018-01-10
卷号852期号:2
DOI10.3847/1538-4357/aa9edb
产权排序第1完成单位
收录类别SCI
关键词Magnetic Reconnection Magnetohydrodynamics (Mhd) Methods: Numerical Sun: Chromosphere
摘要Magnetic reconnection in strongly magnetized regions around the temperature minimum region of the low solar atmosphere is studied by employing MHD-based simulations of a partially ionized plasma within a reactive 2.5D multi-fluid model. It is shown that in the absence of magnetic nulls in a low beta plasma, the ionized and neutral fluid flows are well-coupled throughout the reconnection region. However, non-equilibrium ionization-recombination dynamics play a critical role in determining the structure of the reconnection region, leading to much lower temperature increases and a faster magnetic reconnection rate as compared to simulations that assume plasma to be in ionization-recombination equilibrium. The rate of ionization of the neutral component of the plasma is always faster than recombination within the current sheet region even when the initial plasma beta is as high as beta(0) = 1.46. When the reconnecting magnetic field is in excess of a kilogauss and the plasma beta is lower than 0.0145, the initially weakly ionized plasmas can become fully ionized within the reconnection region and the current sheet can be strongly heated to above 2.5 x 10(4) K, even as most of the collisionally dissipated magnetic energy is radiated away. The Hall effect increases the reconnection rate slightly, but in the absence of magnetic nulls it does not result in significant asymmetries or change the characteristics of the reconnection current sheet down to meter scales.
项目资助者NSFC(11573064, 11203069, 11333007, 11303101, 11403100) ; Western Light of Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS ; Program 973(2013CBA01503) ; NSFC-CAS(U1631130) ; CAS(QYZDJ-SSW-SLH012) ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund(nsfc2015-460, nsfc2015-463, U1501501) ; US National Science Foundation (NSF) ; NSF SHINE(AGS-135842) ; DOE(DE-SC0016363)
语种英语
学科领域太阳与太阳系
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000422716100002
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]WHITE-LIGHT FLARES ; ELLERMAN BOMBS ; AMBIPOLAR DIFFUSION ; 2-FLUID SIMULATIONS ; LOWER ATMOSPHERE ; TRANSITION ; EMISSION ; MODEL
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/12201
专题太阳物理研究组
通讯作者Ni, Lei(Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650216, Yunnan, Peoples R China)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan 650216, P. R. China
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, P. R. China
3.National Science Foundation, 2415 Eisenhower Avenue, Alexandria, VA 22314, USA
4.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA
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GB/T 7714
Ni L,Lukin, Vyacheslav S.,Murphy, Nicholas A.,et al. Magnetic Reconnection in Strongly Magnetized Regions of the Low Solar Chromosphere[J]. ASTROPHYSICAL JOURNAL,2018,852(2).
APA Ni L,Lukin, Vyacheslav S.,Murphy, Nicholas A.,Lin J,&Ni, Lei.(2018).Magnetic Reconnection in Strongly Magnetized Regions of the Low Solar Chromosphere.ASTROPHYSICAL JOURNAL,852(2).
MLA Ni L,et al."Magnetic Reconnection in Strongly Magnetized Regions of the Low Solar Chromosphere".ASTROPHYSICAL JOURNAL 852.2(2018).
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