PMO OpenIR  > 太阳活动的多波段观测研究团组
Radio and multiwavelength evidence of coronal loop eruption in a flare-coronal mass ejection event on 15 April 1998
Huang, GL
2004-02-06
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
ISSN0148-0227
Volume109Issue:A2Pages:A02105
Abstract[1] A typical flare - coronal mass ejection (CME) event is studied at the initial time and position of the flare and CME. The photospheric magnetic configuration consists of two main polarities ( dipolar structure) with some emerged new polarities, similar to a quadrupolar structure, during the event. The coronal loops in soft X-ray and EUV images show the signature of the loop interaction, i.e., the storage of the magnetic energy. The radio bursts at 1 - 2 GHz were observed with fast frequency drifts with bidirectional drift pairs, which may provide a direct signature of upward and downward particle acceleration from the reconnection site, followed by the bulk energy release of the flare. After that, the soft X-ray and EUV loops were suddenly opened and closed again in 10 min. The open time is around the maximum phase of the flare as well as the start time of the associated CME. Meanwhile, the polarization sense of the microwave bursts suddenly reversed at 2.6 - 3.8 GHz, which might have been caused by the fast variation of coronal loops or the magnetic field. The high-time-resolution ( 8 ms) data show the microwave bursts at 2.6 - 3.8 GHz, with slow frequency drifts and zebra structures in the initial phase of the CMEs or shock formation. Hence it is suggested that flares and CMEs may be triggered simultaneously by some MHD instabilities or by reconnection in a favorable magnetic configuration to release the free magnetic energy in two different ways.
KeywordRadio Emissions Magnetic Reconnection Energetic Particles Flares Coronal Mass Ejections
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1029/2003JA010005
WOS KeywordMAGNETIC RECONNECTION ; ACCELERATION ; EMISSION ; WAVES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000189047600001
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7736
Collection太阳活动的多波段观测研究团组
AffiliationChinese Acad Sci, Purple Mt Observ, Nanjing, Peoples R China
Recommended Citation
GB/T 7714
Huang, GL. Radio and multiwavelength evidence of coronal loop eruption in a flare-coronal mass ejection event on 15 April 1998[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2004,109(A2):A02105.
APA Huang, GL.(2004).Radio and multiwavelength evidence of coronal loop eruption in a flare-coronal mass ejection event on 15 April 1998.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,109(A2),A02105.
MLA Huang, GL."Radio and multiwavelength evidence of coronal loop eruption in a flare-coronal mass ejection event on 15 April 1998".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 109.A2(2004):A02105.
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