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, Lei1,2,3; 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 |
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. |
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 ; NSFC ; Western Light of Chinese Academy of Sciences ; Western Light of Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Applied Basic Research of Yunnan Province in China ; Applied Basic Research of Yunnan Province in China ; Key Laboratory of Solar Activity grant ; Key Laboratory of Solar Activity grant ; Program 973 ; Program 973 ; NSFC-CAS Joint grant ; NSFC-CAS Joint grant ; CAS ; CAS ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; US National Science Foundation (NSF) ; US National Science Foundation (NSF) ; NSFC ; NSFC ; Western Light of Chinese Academy of Sciences ; Western Light of Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Applied Basic Research of Yunnan Province in China ; Applied Basic Research of Yunnan Province in China ; Key Laboratory of Solar Activity grant ; Key Laboratory of Solar Activity grant ; Program 973 ; Program 973 ; NSFC-CAS Joint grant ; NSFC-CAS Joint grant ; CAS ; CAS ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; US National Science Foundation (NSF) ; US National Science Foundation (NSF) ; NSFC ; NSFC ; Western Light of Chinese Academy of Sciences ; Western Light of Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Applied Basic Research of Yunnan Province in China ; Applied Basic Research of Yunnan Province in China ; Key Laboratory of Solar Activity grant ; Key Laboratory of Solar Activity grant ; Program 973 ; Program 973 ; NSFC-CAS Joint grant ; NSFC-CAS Joint grant ; CAS ; CAS ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; US National Science Foundation (NSF) ; US National Science Foundation (NSF) ; NSFC ; NSFC ; Western Light of Chinese Academy of Sciences ; Western Light of Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Applied Basic Research of Yunnan Province in China ; Applied Basic Research of Yunnan Province in China ; Key Laboratory of Solar Activity grant ; Key Laboratory of Solar Activity grant ; Program 973 ; Program 973 ; NSFC-CAS Joint grant ; NSFC-CAS Joint grant ; CAS ; CAS ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; US National Science Foundation (NSF) ; US National Science Foundation (NSF) |
源URL | [http://ir.bao.ac.cn/handle/114a11/23861] |
专题 | 中国科学院国家天文台 |
通讯作者 | Ni, Lei |
作者单位 | 1.Chinese Acad Sci, Ctr Astron Mega Sci, 20A Datun Rd, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650216, Yunnan, Peoples R China 3.Natl Astron Observ, CAS Key Lab Solar Act, Beijing 100012, Peoples R China 4.Natl Sci Fdn, 2415 Eisenhower Ave, Alexandria, VA 22314 USA |
推荐引用方式 GB/T 7714 | Ni, Lei,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, Lei,&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, Lei,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:国家天文台
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