OBSERVATION OF HIGH-SPEED OUTFLOWS IN CORONAL LOOPS ASSOCIATED WITH PHOTOSPHERIC MAGNETIC FIELD EVOLUTION

	OBSERVATION OF HIGH-SPEED OUTFLOWS IN CORONAL LOOPS ASSOCIATED WITH PHOTOSPHERIC MAGNETIC FIELD EVOLUTION
	Su, JT 1; Liu Y(刘煜)2 ; Shen YD(申远灯)2 ; Liu, S 1; Mao, XJ 1,3
刊名	ASTROPHYSICAL JOURNAL
	2012-11-20
卷号	760 期号:1
关键词	Sun: activity Sun: corona Sun: flares Sun: oscillations
ISSN号	0004-637X
通讯作者	Su, JT (reprint author), Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China.
产权排序	第二完成单位
英文摘要	Using SDO/AIA instruments, we provide an EUV observation of two adjacent loop strands (Loops 1 and 2) with one side of their footpoints rooted in the boundaries of active region (AR) NOAA 11158 and the other side in the quiet-Sun regions. The AR footpoints of Loop 1 were located in monopolar magnetic areas and those of Loop 2 in mixed polar areas (SDO/HMI magnetograms). There were no apparent outflows found in Loop 1 in 10 hr of observations, whereas in Loop 2, the outflows were detected throughout the whole observation with an average speed of 120-150 km s(-1). We find clear evidence of magnetic reconnections occurring in the AR footpoints of Loop 2 (the opposite magnetic polarities came close and then a part of them disappeared) and magnetic flux dispersal in the quiet-Sun footpoints (a patch of positive polarities decayed with time). Furthermore, with Hinode/SOT observations, there were no significant Ca II H brightenings detected at the loop footpoints of Loop 2 at the chromospheric heights in response to those of the AIA 171 A and 304 A channels when four strong outflow events took place in the loops, which seem to differ from the conclusions of previous studies. In other studies, the rapid coronal outflows along the coronal loops were found to originate from the chromosphere through transient events (e.g., type II spicules).
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]	SLOW MAGNETOACOUSTIC WAVES ; EUV IMAGING SPECTROMETER ; ACTIVE-REGION ; SOLAR CORONA ; SPECTROSCOPIC OBSERVATIONS ; POLAR PLUMES ; HINODE-EIS ; QUIET SUN ; OSCILLATIONS ; PLASMA
收录类别	SCI
原文出处	http://iopscience.iop.org/0004-637X/760/1/82/
语种	英语
WOS记录号	WOS:000310922200082
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/7178]
专题	云南天文台_选址与日冕观测组
作者单位	1.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Science, Beijing 100012, China 2.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China 3.Department of Astronomy, Beijing Normal University, Beijing 100875, China
推荐引用方式 GB/T 7714	Su, JT,Liu Y,Shen YD,et al. OBSERVATION OF HIGH-SPEED OUTFLOWS IN CORONAL LOOPS ASSOCIATED WITH PHOTOSPHERIC MAGNETIC FIELD EVOLUTION[J]. ASTROPHYSICAL JOURNAL,2012,760(1).
APA	Su, JT,Liu Y,Shen YD,Liu, S,&Mao, XJ.(2012).OBSERVATION OF HIGH-SPEED OUTFLOWS IN CORONAL LOOPS ASSOCIATED WITH PHOTOSPHERIC MAGNETIC FIELD EVOLUTION.ASTROPHYSICAL JOURNAL,760(1).
MLA	Su, JT,et al."OBSERVATION OF HIGH-SPEED OUTFLOWS IN CORONAL LOOPS ASSOCIATED WITH PHOTOSPHERIC MAGNETIC FIELD EVOLUTION".ASTROPHYSICAL JOURNAL 760.1(2012).