The effect of magnetic reconnection and writhing in a partial filament eruption

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 太阳高能及相关物理过程研究团组

	The effect of magnetic reconnection and writhing in a partial filament eruption
	Liu, Rui 1; Gilbert, Holly R.1; Alexander, David 1; Su, Yingna2,3,4
刊名	ASTROPHYSICAL JOURNAL
	2008-06-20
卷号	680 期号:2 页码:1508-1515
关键词	Sun : corona Sun : filaments
ISSN号	0004-637X
英文摘要	We present observations from 2007 March 2 of a partial filament eruption characterized by two distinct phases of writhing motions: a quasi-static, slowly evolving phase followed by a rapid kinking phase showing a bifurcation of the filament. The quasi-static kinking motions are observed before there is any heating or flaring evident in EUV or soft X-ray (SXR) observations. As the writhe of the filament develops, a sigmoid becomes sharply defined in the SXR. Prior to eruption onset, the sigmoid in the EUV appears to be composed of two separate looplike structures, which are discontinuous at the projected location where the sigmoid crosses the filament. Coincident with the onset of the eruption and the production of a GOES class B2 flare, the original "two-loop'' EUV sigmoid is now observed as a single continuous structure lying above the filament, signifying the presence of magnetic reconnection and the associated dissipative heating of field lines above the filament. During the eruption, the escaping portion of the filament rotates quickly and erupts together with the expanding arched sigmoid. The portion of the filament that is left behind develops into an inverse S-shaped configuration. The separation of the filament, the EUV brightening at the separation location, and the surviving sigmoidal structure are all signatures of magnetic reconnection occurring within the body of the original filament. Other features of the same event reported by Sterling and coworkers, e. g., the flux cancellation at the polarity inversion line prior to the eruption and the SXR compact loop formed underneath the erupting sigmoid during the eruption, indicate that magnetic reconnection also occurred in the sheared core field beneath the filament. These results suggest that a combination of the kinking motions and internal tether-cutting are responsible for the initiation of the eruption.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	CORONAL MASS EJECTIONS ; LARGE-SCALE CORONA ; FLUX ROPES ; DRIVEN EVOLUTION ; ACTIVE-REGION ; SOLAR-FLARES ; INITIATION ; HELICITY ; PROMINENCES ; SIGMOIDS
收录类别	SCI
语种	英语
WOS记录号	WOS:000256752400056
公开日期	2011-12-29
内容类型	期刊论文
源URL	[http://159.226.72.40/handle/332002/1873]
专题	紫金山天文台_太阳高能及相关物理过程研究团组
作者单位	1.Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA 2.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA 3.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 4.Chinese Acad Sci, Grad Univ, Beijing 100864, Peoples R China
推荐引用方式 GB/T 7714	Liu, Rui,Gilbert, Holly R.,Alexander, David,et al. The effect of magnetic reconnection and writhing in a partial filament eruption[J]. ASTROPHYSICAL JOURNAL,2008,680(2):1508-1515.
APA	Liu, Rui,Gilbert, Holly R.,Alexander, David,&Su, Yingna.(2008).The effect of magnetic reconnection and writhing in a partial filament eruption.ASTROPHYSICAL JOURNAL,680(2),1508-1515.
MLA	Liu, Rui,et al."The effect of magnetic reconnection and writhing in a partial filament eruption".ASTROPHYSICAL JOURNAL 680.2(2008):1508-1515.