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OBSERVATION OF HIGH-SPEED OUTFLOWS IN CORONAL LOOPS ASSOCIATED WITH PHOTOSPHERIC MAGNETIC FIELD EVOLUTION
Su, JT1; Liu Y(刘煜)2; Shen YD(申远灯)2; Liu, S1; Mao, XJ1,3; Su, JT (reprint author), Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China.
Source PublicationASTROPHYSICAL JOURNAL
2012-11-20
Volume760Issue:1
DOI10.1088/0004-637X/760/1/82
Contribution Rank第2完成单位
Indexed BySCI
KeywordSun: Activity Sun: Corona Sun: Flares Sun: Oscillations
AbstractUsing 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).
Funding OrganizationNational Natural Science Foundation of China [11073050, 10611120338, 10673016, 10733020, 10778723, 11003025, 11103037, 10878016, 11178016] ; National Basic Research Program of China [2011CB8114001] ; Important Directional Projects of the Chinese Academy of Sciences [KLCX2-YW-T04] ; Young Researcher Grant of National Astronomical Observatories ; Chinese Academy of Sciences ; Key Laboratory of the Solar Activity National Astronomical Observations, Chinese Academy of Sciences
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-637X
URL查看原文
WOS IDWOS:000310922200082
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSLOW MAGNETOACOUSTIC WAVES ; EUV IMAGING SPECTROMETER ; ACTIVE-REGION ; SOLAR CORONA ; SPECTROSCOPIC OBSERVATIONS ; POLAR PLUMES ; HINODE-EIS ; QUIET SUN ; OSCILLATIONS ; PLASMA
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Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/7178
Collection选址与日冕观测组
Corresponding AuthorSu, JT (reprint author), Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China.
Affiliation1.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
Recommended Citation
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,&Su, JT .(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).
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