Magnetic reconnection in the low solar chromosphere with a more realistic radiative cooling model | |
Ni L(倪蕾)1,2![]() | |
刊名 | PHYSICS OF PLASMAS
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2018-04-01 | |
卷号 | 25期号:4 |
ISSN号 | 1070-664X |
DOI | 10.1063/1.5018351 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | 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. |
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 | 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA |
资助项目 | NSFC[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] |
WOS关键词 | Ellerman Bombs ; Ambipolar Diffusion ; Flux Emergence ; Simulations ; Atmosphere |
WOS研究方向 | Physics |
语种 | 英语 |
出版者 | AMER INST PHYSICS |
WOS记录号 | WOS:000431142200043 |
资助机构 | NSFC[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] |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/12366] ![]() |
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, 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 |
推荐引用方式 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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