Working Group 1
Data group led by Jie Zhang (USA) and Christian Mostl (Austria)
Contents
- 1 Scientific Objectives
- 2 Scientific Questions, Technique Approach/Methodology
- 2.1 What are the criteria of Earth-affecting CMEs?
- 2.2 How to measure 3-D geometric and kinematic properties of CMEs in the corona, e.g., FOVs of COR1, COR2 and HI-1?
- 2.3 How to measure 3-D geometric and kinematic properties of CMEs far from the Sun, e.g., FOVs of HI-2?
- 2.4 How to reconstruct the 3-D structure of ICMEs from in-situ observations?
- 2.5 What is the cause of "stealth" CMEs, i.e., CMEs without clear surface signature?
- 2.6 What is the cause of "problematic" ICMEs, i.e., ICMEs without clear CME counterparts near the Sun?
- 3 Future Plan
Scientific Objectives
- Identifying all Earth-Affecting ICMEs during the STEREO era (from 2007)
- Tracking these events from the Sun to the Earth, and fully measuring/characterizing/quantifying the properties/evolution from the Sun to the Earth
- Providing a comprehensive event database for statistical study, for creating empirical evolution/prediction model, for theoretical understanding, and for comparing/validating numerical models
Scientific Questions, Technique Approach/Methodology
What are the criteria of Earth-affecting CMEs?
How to measure 3-D geometric and kinematic properties of CMEs in the corona, e.g., FOVs of COR1, COR2 and HI-1?
- croissant modeling a la Thernisien et al. (software available in IDL SolarSoft: "rtsccguicloud")
How to measure 3-D geometric and kinematic properties of CMEs far from the Sun, e.g., FOVs of HI-2?
- Geometrical modeling, approximating the CME front with geometrical shapes (points, circles). The IDL SolarSoft SATPLOT software can be used to extract and model time-elongation tracks of CMEs from STEREO/COR2/HI1/HI2 Jmaps.
How to reconstruct the 3-D structure of ICMEs from in-situ observations?
- flux rope modeling:
- minimum variance analysis
- Grad-Shafranov method (non-force-free)
- force-free cylindrical flux ropes
