EVIDENCE FOR THE WAVE NATURE OF AN EXTREME ULTRAVIOLET WAVE OBSERVED BY THE ATMOSPHERIC IMAGING ASSEMBLY ON BOARD THE SOLAR DYNAMICS OBSERVATORY

	EVIDENCE FOR THE WAVE NATURE OF AN EXTREME ULTRAVIOLET WAVE OBSERVED BY THE ATMOSPHERIC IMAGING ASSEMBLY ON BOARD THE SOLAR DYNAMICS OBSERVATORY
	Shen YD(申远灯)1,2 ; Liu Y(刘煜)1
刊名	ASTROPHYSICAL JOURNAL
	2012-07-20
卷号	754 期号:1
关键词	Sun: corona Sun: coronal mass ejections (CMEs) Sun: flares Sun: magnetic topology Sun: oscillations
ISSN号	0004-637X
通讯作者	Shen, YD (reprint author), Chinese Acad Sci, Yunnan Astron Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	Extreme-ultraviolet (EUV) waves have been found for about 15 years. However, significant controversy remains over their physical natures and origins. In this paper, we report an EUV wave that was accompanied by an X1.9 flare and a partial halo coronal mass ejection (CME). Using high temporal and spatial resolution observations taken by the Solar Dynamics Observatory and the Solar-TErrestrial RElations Observatory, we are able to investigate the detailed kinematics of the EUV wave. We find several arguments that support the fast-mode wave scenario. (1) The speed of the EUV wave (570 km s(-1)) is higher than the sound speed of the quiet-Sun corona. (2) Significant deceleration of the EUV wave (-130 m s(-2)) is found during its propagation. (3) The EUV wave resulted in the oscillations of a loop and a filament along its propagation path, and a reflected wave from the polar coronal hole is also detected. (4) Refraction or reflection effect is observed when the EUV wave was passing through two coronal bright points. (5) The dimming region behind the wavefront stopped to expand when the wavefront started to become diffuse. (6) The profiles of the wavefront exhibited a dispersive nature, and the magnetosonic Mach number of the EUV wave derived from the highest intensity jump is about 1.4. In addition, triangulation indicates that the EUV wave propagated within a height range of about 60-100 Mm above the photosphere. We propose that the EUV wave observed should be a nonlinear fast-mode magnetosonic wave that propagated freely in the corona after it was driven by the CME expanding flanks during the initial period.
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 EJECTION ; X-RAY OBSERVATIONS ; I 10830 ANGSTROM ; H-ALPHA MORETON ; EIT WAVES ; EUV WAVE ; FLARE WAVES ; PROPAGATING DISTURBANCE ; QUADRATURE OBSERVATIONS ; SOHO/EIT OBSERVATIONS
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/0004-637X/754/1/7/meta
语种	英语
WOS记录号	WOS:000306111800007
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/7181]
专题	云南天文台_选址与日冕观测组
作者单位	1.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China 2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式 GB/T 7714	Shen YD,Liu Y. EVIDENCE FOR THE WAVE NATURE OF AN EXTREME ULTRAVIOLET WAVE OBSERVED BY THE ATMOSPHERIC IMAGING ASSEMBLY ON BOARD THE SOLAR DYNAMICS OBSERVATORY[J]. ASTROPHYSICAL JOURNAL,2012,754(1).
APA	Shen YD,&Liu Y.(2012).EVIDENCE FOR THE WAVE NATURE OF AN EXTREME ULTRAVIOLET WAVE OBSERVED BY THE ATMOSPHERIC IMAGING ASSEMBLY ON BOARD THE SOLAR DYNAMICS OBSERVATORY.ASTROPHYSICAL JOURNAL,754(1).
MLA	Shen YD,et al."EVIDENCE FOR THE WAVE NATURE OF AN EXTREME ULTRAVIOLET WAVE OBSERVED BY THE ATMOSPHERIC IMAGING ASSEMBLY ON BOARD THE SOLAR DYNAMICS OBSERVATORY".ASTROPHYSICAL JOURNAL 754.1(2012).