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SLOW RISE AND PARTIAL ERUPTION OF A DOUBLE-DECKER FILAMENT. II. A DOUBLE FLUX ROPE MODEL
Bernhard Kliem1,2,3,4; Torok, T5; Titov, VS5; Lionello, R5; Linker, JA5; Liu, R6,7; Liu, C7; Wang, HM7; Kliem, B (reprint author), Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24, D-14476 Potsdam, Germany.
发表期刊ASTROPHYSICAL JOURNAL
2014-09-10
卷号792期号:2
DOI10.1088/0004-637X/792/2/107
产权排序第2完成单位
收录类别SCI
关键词Instabilities Magnetohydrodynamics (Mhd) Sun: Coronal Mass Ejections (Cmes) Sun: Flares Sun: Filaments Prominences
摘要Force-free equilibria containing two vertically arranged magnetic flux ropes of like chirality and current direction are considered as a model for split filaments/prominences and filament-sigmoid systems. Such equilibria are constructed analytically through an extension of the methods developed in Titov & Demoulin and numerically through an evolutionary sequence including shear flows, flux emergence, and flux cancellation in the photospheric boundary. It is demonstrated that the analytical equilibria are stable if an external toroidal (shear) field component exceeding a threshold value is included. If this component decreases sufficiently, then both flux ropes turn unstable for conditions typical of solar active regions, with the lower rope typically becoming unstable first. Either both flux ropes erupt upward, or only the upper rope erupts while the lower rope reconnects with the ambient flux low in the corona and is destroyed. However, for shear field strengths staying somewhat above the threshold value, the configuration also admits evolutions which lead to partial eruptions with only the upper flux rope becoming unstable and the lower one remaining in place. This can be triggered by a transfer of flux and current from the lower to the upper rope, as suggested by the observations of a split filament in Paper I. It can also result from tether-cutting reconnection with the ambient flux at the X-type structure between the flux ropes, which similarly influences their stability properties in opposite ways. This is demonstrated for the numerically constructed equilibrium.
项目资助者DFG ; STFC ; NSF [AGS-1249270, AGS-1153226, AGS-1348513] ; Chinese Academy of Sciences [2012T1J0017] ; NASA's HTP ; LWS ; SRT programs ; CISM (an NSF Science and Technology Center) ; NASA [NNX13AG13G, NNX13AF76G]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
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WOS记录号WOS:000341172200025
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]CORONAL MASS EJECTION ; SOLAR ACTIVE-REGION ; 2010 APRIL 8 ; MAGNETIC-STRUCTURE ; PROMINENCE ; EVOLUTION ; EQUILIBRIUM ; SIMULATIONS ; HELICITY ; SIGMOIDS
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6244
专题太阳物理研究组
通讯作者Kliem, B (reprint author), Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24, D-14476 Potsdam, Germany.
作者单位1.Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Strasse 24, D-14476 Potsdam, Germany
2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
3.Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, UK
4.College of Science, George Mason University, Fairfax, VA 22030, USA
5.Predictive Science, Inc., San Diego, CA 92121, USA
6.CAS Key Laboratory of Geospace Environment, University of Science and Technology of China, Hefei 230026, China
7.Space Weather Research Laboratory, Center for Solar-Terrestrial Research, NJIT, Newark, NJ 07102, USA
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Bernhard Kliem,Torok, T,Titov, VS,et al. SLOW RISE AND PARTIAL ERUPTION OF A DOUBLE-DECKER FILAMENT. II. A DOUBLE FLUX ROPE MODEL[J]. ASTROPHYSICAL JOURNAL,2014,792(2).
APA Bernhard Kliem.,Torok, T.,Titov, VS.,Lionello, R.,Linker, JA.,...&Kliem, B .(2014).SLOW RISE AND PARTIAL ERUPTION OF A DOUBLE-DECKER FILAMENT. II. A DOUBLE FLUX ROPE MODEL.ASTROPHYSICAL JOURNAL,792(2).
MLA Bernhard Kliem,et al."SLOW RISE AND PARTIAL ERUPTION OF A DOUBLE-DECKER FILAMENT. II. A DOUBLE FLUX ROPE MODEL".ASTROPHYSICAL JOURNAL 792.2(2014).
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