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Magnetic reconnection in the low solar chromosphere with a more realistic radiative cooling model
Ni L(倪蕾)1,2; Lukin, Vyacheslav S.3; Murphy, Nicholas A.4; Lin, Jun1,2
Source PublicationPHYSICS OF PLASMAS
2018-04-01
Volume25Issue:4
DOI10.1063/1.5018351
Contribution Rank第1完成单位
Indexed BySCI ; EI
Abstract

Magnetic reconnection is the most likely mechanism responsible for the high temperature events that are observed in strongly magnetized locations around the temperature minimum in the low solar chromosphere. This work improves upon our previous work [Ni et al., Astrophys. J. 852, 95 (2018)] by using a more realistic radiative cooling model computed from the OPACITY project and the CHIANTI database. We find that the rate of ionization of the neutral component of the plasma is still faster than recombination within the current sheet region. For low beta plasmas, the ionized and neutral fluid flows are well-coupled throughout the reconnection region resembling the single-fluid Sweet-Parker model dynamics. Decoupling of the ion and neutral inflows appears in the higher beta case with beta(0) = 1.46, which leads to a reconnection rate about three times faster than the rate predicted by the Sweet-Parker model. In all cases, the plasma temperature increases with time inside the current sheet, and the maximum value is above 2 x 10(4) K when the reconnection magnetic field strength is greater than 500 G. While the more realistic radiative cooling model does not result in qualitative changes of the characteristics of magnetic reconnection, it is necessary for studying the variations of the plasma temperature and ionization fraction inside current sheets in strongly magnetized regions of the low solar atmosphere. It is also important for studying energy conversion during the magnetic reconnection process when the hydrogen-dominated plasma approaches full ionization. Published by AIP Publishing.

Funding ProjectNSFC[11573064] ; NSFC[11203069] ; NSFC[11333007] ; NSFC[11303101] ; NSFC[11403100] ; Western Light of Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS ; 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] ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund[U1501501] ; U.S. National Science Foundation (NSF) ; NSF SHINE Grant[AGS-1358342] ; DOE[DE-SC0016363]
Funding OrganizationNSFC[11573064, 11203069, 11333007, 11303101, 11403100] ; Western Light of Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS ; 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, U1501501] ; U.S. National Science Foundation (NSF) ; NSF SHINE Grant[AGS-1358342] ; DOE[DE-SC0016363]
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherAMER INST PHYSICS
Publication Place1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
ISSN1070-664X
URL查看原文
WOS IDWOS:000431142200043
WOS Research AreaPhysics
WOS SubjectPhysics, Fluids & Plasmas
WOS KeywordEllerman Bombs ; Ambipolar Diffusion ; Flux Emergence ; Simulations ; Atmosphere
EI Accession Number20181605025043
EI KeywordsMagnetoplasma
EI Classification Number443.1atmospheric Properties - 525.5energy Conversion Issues - 631.1fluid Flow, General - 641.2heat Transfer - 701.2magnetism: Basic Concepts And Phenomena - 802.2chemical Reactions - 932.3plasma Physics
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12366
Collection太阳物理研究组
Corresponding AuthorNi L(倪蕾)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, P. O. Box 110, Kunming, Yunnan 650216,
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District,
3.National Science Foundation, 2415 Eisenhower Avenue, Alexandria, Virginia 22314, USA
4.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Ni L,Lukin, Vyacheslav S.,Murphy, Nicholas A.,et al. Magnetic reconnection in the low solar chromosphere with a more realistic radiative cooling model[J]. PHYSICS OF PLASMAS,2018,25(4).
APA Ni L,Lukin, Vyacheslav S.,Murphy, Nicholas A.,&Lin, Jun.(2018).Magnetic reconnection in the low solar chromosphere with a more realistic radiative cooling model.PHYSICS OF PLASMAS,25(4).
MLA Ni L,et al."Magnetic reconnection in the low solar chromosphere with a more realistic radiative cooling model".PHYSICS OF PLASMAS 25.4(2018).
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