Evolution of the sheared magnetic fields of two X-class flares observed by Hinode/XRT

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 太阳活动的多波段观测研究团组

	Evolution of the sheared magnetic fields of two X-class flares observed by Hinode/XRT
	Su, Yingna1,2,3 ; Golub, Leon 1; Van Ballegooijen, Adriaan 1; Deluca, Edward E.1; Reeves, Kathy K.1; Sakao, Taro 4; Kano, Ryouhei 5; Narukage, Noriyuki 4; Shibasaki, Kiyoto 6
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
	2007
卷号	59 页码:S785-S791
关键词	sun : corona sun : filaments sun : flares sun : magnetic fields sun : X-rays, gamma rays
英文摘要	We present multi-wavelength observations of the evolution of the sheared magnetic fields in NOAA Active Region 10930, where two X-class flares occurred on 2006 December 13 and December 14, respectively. Observations made with the X-ray Telescope (XRT) and the Solar Optical Telescope (SOT) aboard Hinode suggest that the gradual formation of the sheared magnetic fields in this active region is caused by the rotation and west-to-east motion of an emerging sunspot. In the pre-flare phase of the two flares, XRT shows several highly sheared X-ray loops in the core field region, corresponding to a filament seen in the TRACE EUV observations. XRT observations also show that part of the sheared core field erupted, and another part of the sheared core field stayed behind during the flares, which may explain why a large part of the filament is still seen by TRACE after the flare. About 2 - 3 hours after the peak of each flare, the core field becomes visible in XRT again, and shows a highly sheared inner and less-sheared outer structure. We also find that the post-flare core field is clearly less sheared than the pre-flare core field, which is consistent with the idea that the energy released during the flares is stored in the highly sheared fields prior to the flare.
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 ; RAY TELESCOPE ; SOLAR-B ; RELAXATION ; MISSION ; MOTION ; YOHKOH
收录类别	SCI
语种	英语
WOS记录号	WOS:000253152600032
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/15876]
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.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 4.Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan 5.Natl Inst Nat Sci, Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan 6.Natl Inst Nat Sci, Natl Astron Observ Japan, Nobeyama Solar Radio Observ, Minamimaki, Nagano 3841305, Japan
推荐引用方式 GB/T 7714	Su, Yingna,Golub, Leon,Van Ballegooijen, Adriaan,et al. Evolution of the sheared magnetic fields of two X-class flares observed by Hinode/XRT[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2007,59:S785-S791.
APA	Su, Yingna.,Golub, Leon.,Van Ballegooijen, Adriaan.,Deluca, Edward E..,Reeves, Kathy K..,...&Shibasaki, Kiyoto.(2007).Evolution of the sheared magnetic fields of two X-class flares observed by Hinode/XRT.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,59,S785-S791.
MLA	Su, Yingna,et al."Evolution of the sheared magnetic fields of two X-class flares observed by Hinode/XRT".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 59(2007):S785-S791.