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Magnetic Properties of Metric Noise Storms Associated with Coronal Mass Ejections
YaYuan Wen; JingXiu Wang; YuZong Zhang
2007
Source PublicationChinese Journal of Astronomy and Astrophysics
ISSN1009-9271
Volume7Issue:2Pages:265
AbstractUsing Nancay Radioheliograph (NRH) imaging observations, combined with SOHO/Michelson Doppler Imager (MDI) magnetogram observations and coronal magnetic field extrapolation, we studied the magnetic nature of metric noise storms that are associated with coronal mass ejections (CMEs). Four events are selected: the events of 2000 July 14, 2001 April 26, 2002 August 16 and 2001 March 28. The identified noise storm sources cover or partially cover the active regions (ARs), but the centers of storm sources are offset from the ARs. Using extrapolated magnetic field lines, we find that the noise storm sources trace the boundary between the open and closed field lines. We demonstrate that the disappearance of noise storm source is followed by the appearance of the burst source. The burst sources spread on the solar disk and their distributions correspond to the extent of the CME in LASCO C2 field of view. All the SOHO/Extreme Ultraviolet Imaging Telescope (EIT) dimmings associated with noise storm sources are located at the periphery of noise storms where the magnetic lines of force were previously closed and low-lying. When the closed field becomes partially or fully open, the basic configurations of noise storm sources are changed, then the noise storm sources are no longer observed. These observations provide the information that the variations of noise storms manifest the restructuring or reconfiguring of the coronal magnetic field.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/44465
Collection中国科学院国家天文台
Affiliation中国科学院国家天文台
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
YaYuan Wen,JingXiu Wang,YuZong Zhang. Magnetic Properties of Metric Noise Storms Associated with Coronal Mass Ejections[J]. Chinese Journal of Astronomy and Astrophysics,2007,7(2):265.
APA YaYuan Wen,JingXiu Wang,&YuZong Zhang.(2007).Magnetic Properties of Metric Noise Storms Associated with Coronal Mass Ejections.Chinese Journal of Astronomy and Astrophysics,7(2),265.
MLA YaYuan Wen,et al."Magnetic Properties of Metric Noise Storms Associated with Coronal Mass Ejections".Chinese Journal of Astronomy and Astrophysics 7.2(2007):265.
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