Onset of Secondary Instabilities and Plasma Heating during Magnetic Reconnection in Strongly Magnetized Regions of the Low Solar Atmosphere
文献类型:期刊论文
作者 | Ni L(倪蕾)1,2,3; Lukin, Vyacheslav S.4 |
刊名 | ASTROPHYSICAL JOURNAL |
出版日期 | 2018-12-01 |
卷号 | 868期号:2页码:10 |
ISSN号 | 0004-637X |
关键词 | magnetic reconnection magnetohydrodynamics (MHD) methods: numerical Sun: chromosphere |
DOI | 10.3847/1538-4357/aaeb97 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | We numerically study magnetic reconnection on different spatial scales and at different heights in the weakly ionized plasma of the low solar atmosphere (around 300-800 km above the solar surface) within a reactive 2.5D multifluid plasma-neutral model. We consider a strongly magnetized plasma (beta similar to 6%) evolving from a force-free magnetic configuration and perturbed to initialize formation of a reconnection current sheet. On large scales, the resulting current sheets are observed to undergo a secondary "plasmoid" instability. A series of simulations at different scales demonstrates a cascading current sheet formation process that terminates for current sheets with width of 2 m and length of similar to 100 m, corresponding to the critical current sheet aspect ratio of -50. We also observe that the plasmoid instability is the primary physical mechanism accelerating the magnetic reconnection in this plasma parameter regime. After plasmoid instabilities appear, the reconnection rate sharply increases to a value of similar to 0.035, observed to be independent of the Lundquist number. These characteristics are very similar to magnetic reconnection in fully ionized plasmas. In this low-beta guide-field reconnection regime, both the recombination and collisionless effects are observed to have a small contribution to the reconnection rate. The simulations show that it is difficult to heat the dense weakly ionized photospheric plasmas to above 2 x 10(4) K during the magnetic reconnection process. However, the plasmas in the low solar chromosphere can be heated above 3 x 10(4) K with reconnection magnetic fields of 500 G or stronger. |
学科主题 | 天文学 ; 太阳与太阳系 ; 太阳物理学 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
资助项目 | NSFC[11573064] ; NSFC[11333007] ; NSFC[11303101] ; NSFC[11403100] ; Western Light of Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS ; Applied Basic Research of Yunnan Province in China[2018FB009] ; Key Laboratory of Solar Activity grant[KLSA201812] ; Program 973[2013CBA01503] ; NSFC-CAS Joint grant[U1631130] ; CAS[QYZDJ-SSW-SLH012] ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund[nsfc2015-460] ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund[nsfc2015-463] ; Strategic Priority Research Program of CAS[XDA17040507] ; US National Science Foundation (NSF) |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000452414800002 |
资助机构 | NSFC[11573064, 11333007, 11303101, 11403100] ; Western Light of Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS ; Applied Basic Research of Yunnan Province in China[2018FB009] ; Key Laboratory of Solar Activity grant[KLSA201812] ; Program 973[2013CBA01503] ; NSFC-CAS Joint grant[U1631130] ; CAS[QYZDJ-SSW-SLH012] ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund[nsfc2015-460, nsfc2015-463] ; Strategic Priority Research Program of CAS[XDA17040507] ; US National Science Foundation (NSF) |
源URL | [http://ir.ynao.ac.cn/handle/114a53/18605] |
专题 | 云南天文台_太阳物理研究组 |
通讯作者 | Ni L(倪蕾) |
作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, P. O. Box 110, Kunming, Yunnan 650216, People's Republic of China 2.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Beijing 100012, People's Republic of China 3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China 4.National Science Foundation, 2415 Eisenhower Avenue, Alexandria, VA 22314, USA |
推荐引用方式 GB/T 7714 | Ni L,Lukin, Vyacheslav S.. Onset of Secondary Instabilities and Plasma Heating during Magnetic Reconnection in Strongly Magnetized Regions of the Low Solar Atmosphere[J]. ASTROPHYSICAL JOURNAL,2018,868(2):10. |
APA | Ni L,&Lukin, Vyacheslav S..(2018).Onset of Secondary Instabilities and Plasma Heating during Magnetic Reconnection in Strongly Magnetized Regions of the Low Solar Atmosphere.ASTROPHYSICAL JOURNAL,868(2),10. |
MLA | Ni L,et al."Onset of Secondary Instabilities and Plasma Heating during Magnetic Reconnection in Strongly Magnetized Regions of the Low Solar Atmosphere".ASTROPHYSICAL JOURNAL 868.2(2018):10. |
入库方式: OAI收割
来源:云南天文台
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。