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检索条件"作者=Bin Gui1,2 Chenglong Shen1 Yuming Wang1, Pinzhong Ye1,2 Jiajia Liu1 Shui Wang1 and Xuepu Zhao3 "

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Quantitative Analysis of CME Deflection in the Corona

Quantitative Analysis of CME Deflection in the Corona

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第十四届全国日地空间物理学术研讨会

作者： bin gui1,2 chenglong shen1 yuming wang1, pinzhong ye1,2 jiajia liu1 shui wang1 and xuepu zhao3 (1 CAS Key Laboratory of Geospace Environment, Department of Geophysics & Planetary Sciences, University of Science & Technology of China, Hefei, Anhui 230026, China) (2 State Key Laboratory of Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing, China) (3 W.W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA 94305, USA )

In this paper, ten CME events viewed by the STEREO twin spacecraft are analyzed to study the deflections of CMEs during their propagation in the corona. Based on the three-dimensional information of the CMEs derived by the graduated cylindrical shell （GCS） model [Thernisien et al., 2006], it is found that the propagation directions of eight CMEs had changed. By applying the theoretical method proposed by shen et al. [2011] to all the CMEs, we found that the deflections are consistent, in strength and direction, with the gradient of the magnetic energy density. There is a positive correlation between the deflection rate and the strength of the magnetic energy density gradient and a weak anti-correlation between the deflection rate and the CME speed. Our results suggest that the deflections of CMEs are mainly controlled by the background magnetic field and can be quantitatively described by the magnetic energy density gradient （MEDG） model.

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CME Deflections in the Corona

CME Deflections in the Corona

引用

第十四届全国日地空间物理学术研讨会

作者： yuming wang1 bin gui1 chenglong shen1 pinzhong ye1 shui wang1 and xuepu zhao2 (1 CAS Key Laboratory of Geospace Environment, Department of Geophysics & Planetary Sciences, University of Science & Technology of China, Hefei, Anhui 230026, China ) (2 W.W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA 94305, USA )

In this paper, ten CME events viewed by the STEREO twin spacecraft are analyzed to study the deflections of CMEs during their propagation in the corona. Based on the three-dimensional information of the CMEs derived by the graduated cylindrical shell （GCS） model （Thernisien, Howard, and Vourlidas in Astrophys. J. 652, 1305, 2006）, it is found that the propagation directions of eight CMEs had changed. By applying the theoretical method proposed by shen et al. （Solar Phys. 269, 389, 2011） to all the CMEs, we found that the deflections are consistent, in strength and direction, with the gradient of the magnetic energy density. There is a positive correlation between the deflection rate and the strength of the magnetic energy density gradient and a weak anti-correlation between the deflection rate and the CME speed. Our results suggest that the deflections of CMEs are mainly controlled by the background magnetic field and can be quantitatively described by the magnetic energy density gradient （MEDG） model.

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