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FLARE ENERGY BUILD-UP IN A DECAYING ACTIVE REGION NEAR A CORONAL HOLE

文献类型：期刊论文

作者Su, Yingna1,2; van Ballegooijen, Adriaan1; Schmieder, Brigitte3; Berlicki, Arkadiusz3,4,5; Guo, Yang3; Golub, Leon1; Huang, Guangli2
刊名ASTROPHYSICAL JOURNAL
出版日期2009-10-10
卷号704期号:1页码:341-353
关键词Sun: corona Sun: filaments Sun: flares Sun: magnetic fields Sun: photosphere Sun: X-rays, gamma rays
ISSN号0004-637X
英文摘要A B1.7 two-ribbon flare occurred in a highly non-potential decaying active region near a coronal hole at 10: 00 UT on 2008 May 17. This flare is "large" in the sense that it involves the entire region, and it is associated with both a filament eruption and a coronal mass ejection. We present multi-wavelength observations from EUV (TRACE, STEREO/EUVI), X-rays (Hinode/XRT), and Ha (THEMIS, BBSO) prior to, during and after the flare. Prior to the flare, the region contained two filaments. The long J-shaped sheared loops corresponding to the southern filament were evolved from two short loop systems, which happened around 22: 00 UT after a filament eruption on May 16. Formation of highly sheared loops in the southeastern part of the region was observed by STEREO 8 hr before the flare. We also perform nonlinear force-free field (NLFFF) modeling for the region at two times prior to the flare, using the flux rope insertion method. The models include the non-force-free effect of magnetic buoyancy in the photosphere. The best-fit NLFFF models show good fit to observations both in the corona (X-ray and EUV loops) and chromosphere (Ha filament). We find that the horizontal fields in the photosphere are relatively insensitive to the present of flux ropes in the corona. The axial flux of the flux rope in the NLFFF model on May 17 is twice that on May 16, and the model on May 17 is only marginally stable. We also find that the quasi-circular flare ribbons are associated with the separatrix between open and closed fields. This observation and NLFFF modeling suggest that this flare may be triggered by the reconnection at the null point on the separatrix surface.
WOS标题词Science & Technology ; Physical Sciences
学科主题Astronomy & Astrophysics
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
关键词[WOS]RAY TELESCOPE XRT ; MAGNETIC-FIELD ; FORCE-FREE ; MASS EJECTIONS ; SOLAR-FLARES ; RECONNECTION ; FILAMENT ; FLUX ; THEMIS ; MODEL
收录类别SCI
语种英语
WOS记录号WOS:000270219500028
公开日期2011-12-08
源URL[http://159.226.72.40/handle/332002/1529]  
专题紫金山天文台_太阳活动的多波段观测研究团组
作者单位1.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
2.Purple Mt Observ, Nanjing 210008, Peoples R China
3.LESIA, Sect Meudon, Observ Paris, F-92195 Meudon, France
4.ASCR, Astron Inst, Ondrejov 25165, Czech Republic
5.Univ Wroclaw, Astron Inst, PL-51140 Wroclaw, Poland
推荐引用方式
GB/T 7714		 Su, Yingna,van Ballegooijen, Adriaan,Schmieder, Brigitte,et al. FLARE ENERGY BUILD-UP IN A DECAYING ACTIVE REGION NEAR A CORONAL HOLE[J]. ASTROPHYSICAL JOURNAL,2009,704(1):341-353.
APA Su, Yingna.,van Ballegooijen, Adriaan.,Schmieder, Brigitte.,Berlicki, Arkadiusz.,Guo, Yang.,...&Huang, Guangli.(2009).FLARE ENERGY BUILD-UP IN A DECAYING ACTIVE REGION NEAR A CORONAL HOLE.ASTROPHYSICAL JOURNAL,704(1),341-353.
MLA Su, Yingna,et al."FLARE ENERGY BUILD-UP IN A DECAYING ACTIVE REGION NEAR A CORONAL HOLE".ASTROPHYSICAL JOURNAL 704.1(2009):341-353.

入库方式： OAI收割

来源：紫金山天文台

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