천문학회보 (The Bulletin of The Korean Astronomical Society)
- 제36권2호
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- Pages.95.1-95.1
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- 2011
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- 1226-2692(pISSN)
Comparison of the radial velocities of Halo CMEs based on a flux rope model and an ice cream cone model
- Kim, Tae-Hyeon (School of space research, KyungHee University) ;
- Moon, Yong-Jae (School of space research, KyungHee University) ;
- Na, Hyeon-Ock (School of space research, KyungHee University)
- 발행 : 2011.10.05
초록
Halo Coronal Mass Ejections (HCMEs) are crucial for space weather, since they can produce severe geomagnetic storms when they interact with the Earth's magnetosphere. It is thus very important to infer their directions, radial velocities, and their three-dimensional structures. In this study, we apply two different models to HCMEs since 2008 : (1) an ice cream cone model by Xue et al (2005) using SOHO/LASCO data, (2) a flux rope model by Thernisien et al. (2009) using STEREO/SECCHI data. In addition, we use the flux rope model with zero separation angle of flux rope, which is morphologically similar to the ice cream cone model. The comparison shows that the CME radial velocities from three models have very good correlations (R>0.9) one another. We are extending this comparison to other partial halo CMEs observed by STEREO and SOHO.
키워드