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HEATING MECHANISMS IN THE LOW SOLAR ATMOSPHERE THROUGH MAGNETIC RECONNECTION IN CURRENT SHEETS
Ni L(倪蕾)1,2; Lin J(林隽)1; Ilia I. Roussev3; Brigitte Schmieder4; Ni, L (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China
发表期刊ASTROPHYSICAL JOURNAL
2016-12-01
卷号832期号:2
DOI10.3847/0004-637X/832/2/195
产权排序第1完成单位
收录类别SCI
关键词Magnetic Reconnection Magnetohydrodynamics (Mhd) Shock Waves Sun: Chromosphere
摘要We simulate several magnetic reconnection processes in the low solar chromosphere/photosphere; the radiation cooling, heat conduction and ambipolar diffusion are all included. Our numerical results indicate that both the high temperature (greater than or similar to 8 x 10(4) K) and low temperature (similar to 10(4) K) magnetic reconnection events can happen in the low solar atmosphere (100-600 km above the solar surface). The plasma beta controlled by plasma density and magnetic fields is one important factor to decide how much the plasma can be heated up. The low temperature event is formed in a high beta magnetic reconnection process, Joule heating is the main mechanism to heat plasma and the maximum temperature increase is only several thousand Kelvin. The high temperature explosions can be generated in a low beta magnetic reconnection process, slow and fast-mode shocks attached at the edges of the well developed plasmoids are the main physical mechanisms to heat the plasma from several thousand Kelvin to over 8 x 10(4) K. Gravity in the low chromosphere can strongly hinder the plasmoid instability and the formation of slow-mode shocks in a vertical current sheet. Only small secondary islands are formed; these islands, however, are not as well developed as those in the horizontal current sheets. This work can be applied to understand the heating mechanism in the low solar atmosphere and could possibly be extended to explain the formation of common low temperature Ellerman bombs (similar to 10(4) K) and the high temperature Interface Region Imaging Spectrograph (IRIS) bombs (greater than or similar to 8 x 10(4)) in the future.
项目资助者ISSI ; NSFC(11573064, 11203069, 11273055, 11333007) ; Western Light of Chinese Academy of Sciences ; key Laboratory of Solar Activity grant(KLSA201404) ; Program 973(2013CBA01503) ; CAS(XDB09040202) ; Special Program for applied Research on Super Computation of the NSFC-Guangdong Joint Fund(nsfc2015-460, nsfc2015-463)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
归档日期2016-12-02
WOS记录号WOS:000390490100055
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]FLUX EMERGENCE IMPLICATIONS ; WHITE-LIGHT FLARES ; ELLERMAN BOMBS ; NUMERICAL SIMULATIONS ; FINE-STRUCTURES ; CHROMOSPHERE ; JETS ; INTRANETWORK ; INSTABILITY ; EMISSION
引用统计
被引频次:2[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/114a53/9848
专题太阳物理研究组
通讯作者Ni, L (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
3.Division of Geosciences, National Science Foundation Arlington, Virginia, USA
4.Observatoire de Paris, LESIA, Meudon, France
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Ni L,Lin J,Ilia I. Roussev,et al. HEATING MECHANISMS IN THE LOW SOLAR ATMOSPHERE THROUGH MAGNETIC RECONNECTION IN CURRENT SHEETS[J]. ASTROPHYSICAL JOURNAL,2016,832(2).
APA Ni L,Lin J,Ilia I. Roussev,Brigitte Schmieder,&Ni, L .(2016).HEATING MECHANISMS IN THE LOW SOLAR ATMOSPHERE THROUGH MAGNETIC RECONNECTION IN CURRENT SHEETS.ASTROPHYSICAL JOURNAL,832(2).
MLA Ni L,et al."HEATING MECHANISMS IN THE LOW SOLAR ATMOSPHERE THROUGH MAGNETIC RECONNECTION IN CURRENT SHEETS".ASTROPHYSICAL JOURNAL 832.2(2016).
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