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THE NATURE OF CME-FLARE-ASSOCIATED CORONAL DIMMING
Cheng, J. X.1,2; Qiu, J.3
2016-07-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume825Issue:1
AbstractCoronal mass ejections (CMEs) are often accompanied by coronal dimming that is evident in extreme ultraviolet (EUV) and soft X-ray observations. The locations of dimming are sometimes considered to map footpoints of the erupting flux rope. As the emitting material expands in the corona, the decreased plasma density leads to reduced emission observed in spectral and irradiance measurements. Therefore, signatures of dimming may reflect the properties of CMEs in the early phase of their eruption. In this study, we analyze the event of flare, CME, and coronal dimming on 2011 December 26. We use the data from the Atmospheric Imaging Assembly on the Solar Dynamics Observatory for disk observations of the dimming, and analyze images taken by EUVI, COR1, and COR2 on board the Solar Terrestrial Relations Observatory to obtain the height and velocity of the associated CMEs observed at the limb. We also measure the magnetic reconnection rate from flare observations. Dimming occurs in a few locations next to the flare ribbons, and it is observed in multiple EUV passbands. Rapid dimming starts after the onset of fast reconnection and CME acceleration, and its evolution tracks the CME height and flare reconnection. The spatial distribution of dimming exhibits cores of deep dimming with a rapid growth, and their light curves are approximately linearly scaled with the CME height profile. From the dimming analysis we infer the process of the CME expansion, and estimate properties of the CME.
KeywordMagnetic Reconnection Sun: Coronal Mass Ejections (Cmes) Sun: Flares Sun: Uv Radiation
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.3847/0004-637X/825/1/37
WOS KeywordSOHO EIT OBSERVATIONS ; MASS EJECTION ONSET ; MAGNETIC-FLUX ROPE ; SOLAR-FLARES ; OUTER CORONA ; YOHKOH SXT ; RECONNECTION ; EXPANSION ; EVOLUTION ; CLOUD
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000381930000037
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23618
Collection中国科学院紫金山天文台
Corresponding AuthorCheng, J. X.
Affiliation1.Shanghai Astron Observ, Key Lab Planetary Sci, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
3.Montana State Univ, Dept Phys, Bozeman, MT 59717 USA
Recommended Citation
GB/T 7714
Cheng, J. X.,Qiu, J.. THE NATURE OF CME-FLARE-ASSOCIATED CORONAL DIMMING[J]. ASTROPHYSICAL JOURNAL,2016,825(1).
APA Cheng, J. X.,&Qiu, J..(2016).THE NATURE OF CME-FLARE-ASSOCIATED CORONAL DIMMING.ASTROPHYSICAL JOURNAL,825(1).
MLA Cheng, J. X.,et al."THE NATURE OF CME-FLARE-ASSOCIATED CORONAL DIMMING".ASTROPHYSICAL JOURNAL 825.1(2016).
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