DYNAMICS OF THE FLARING LOOP SYSTEM OF 2005 AUGUST 22 OBSERVED IN MICROWAVES AND HARD X-RAYS

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

	DYNAMICS OF THE FLARING LOOP SYSTEM OF 2005 AUGUST 22 OBSERVED IN MICROWAVES AND HARD X-RAYS
	Reznikova, V. E.1,2; Melnikov, V. F.1,3; Ji, H.4; Shibasaki, K.1
刊名	ASTROPHYSICAL JOURNAL
	2010-11-20
卷号	724 期号:1 页码:171-181
关键词	acceleration of particles Sun: flares Sun: radio radiation Sun: X-rays, gamma rays
ISSN号	0004-637X
英文摘要	We studied the spatial dynamics of the flaring loop in the 2005 August 22 event using microwave (NoRH) and hard X-ray (RHESSI) observations together with complementary data from SOHO/MDI, SMART at Hida, SOHO/EIT, and TRACE. We have found that (1) the pre-flare morphology of the active region exhibits a strongly sheared arcade seen in H alpha and the J-shape filament seen in EUV; (2) energy release and high-energy electron acceleration occur in a sequence along the extensive arcade; (3) the shear angle and the parallel (to the magnetic neutral line) component of the footpoint (FP) distance steadily decrease during the flare process; (4) the radio loop shrinks in length and height during the first emission peak, and later it grows; after the fourth peak the simultaneous descending of the brightest loop and formation of a new microwave loop at a higher altitude occur; (5) the hard X-ray coronal source is located higher than the microwave loop apex and shows faster upward motion; (6) the first peak on microwave time profiles is present in both the loop top and FP regions. However, the emission peaks that follow are present only in the FP regions. We conclude that after the first emission peak the acceleration site is located over the flaring arcade and particles are accelerated along magnetic field lines. We make use of the collapsing magnetic trap model to understand some observational effects.
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]	SOLAR-FLARES ; MAGNETIC RECONNECTION ; SIGMOIDAL STRUCTURE ; CURRENT SHEET ; FLUX ROPES ; MOTIONS ; MODEL ; FOOTPOINTS ; RIBBONS ; ACCELERATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000284096900017
公开日期	2011-11-23
内容类型	期刊论文
源URL	[http://159.226.72.40/handle/332002/1229]
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.Nobeyama Solar Radio Observ NAOJ, Minamimaki, Nagano 3841305, Japan 2.Radiophys Res Inst, Nizhnii Novgorod 603950, Russia 3.Russian Acad Sci, Cent Astron Observ Pulkovo, St Petersburg 196140, Russia 4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Reznikova, V. E.,Melnikov, V. F.,Ji, H.,et al. DYNAMICS OF THE FLARING LOOP SYSTEM OF 2005 AUGUST 22 OBSERVED IN MICROWAVES AND HARD X-RAYS[J]. ASTROPHYSICAL JOURNAL,2010,724(1):171-181.
APA	Reznikova, V. E.,Melnikov, V. F.,Ji, H.,&Shibasaki, K..(2010).DYNAMICS OF THE FLARING LOOP SYSTEM OF 2005 AUGUST 22 OBSERVED IN MICROWAVES AND HARD X-RAYS.ASTROPHYSICAL JOURNAL,724(1),171-181.
MLA	Reznikova, V. E.,et al."DYNAMICS OF THE FLARING LOOP SYSTEM OF 2005 AUGUST 22 OBSERVED IN MICROWAVES AND HARD X-RAYS".ASTROPHYSICAL JOURNAL 724.1(2010):171-181.