Working Group 2
Theory group led by Bojan Vrsnak (Croatia) and Yuming Wang (China)
Contents
- 1 Scientific Objectives
- 2 Scientific Questions
- 2.1 Which mechanisms, processes, forces are governing the CME take-off and ICME propagation?
- 2.1.1 - What is the role of the flare-associated reconnection?
- 2.1.2 - What is the role of emerging flux and poloidal-flux injection?
- 2.1.3 - How long the Lorentz force dominates over the aerodynamic drag
- 2.1.4 - How the inductive effects affect the CME eruption and ICME propagation?
- 2.1.5 - What is the role of the ICME/ambient-field reconnection?
- 2.2 How much variable ambient conditions affect ICMEs?
- 2.2.1 - Which processes are involved in ICME-ICME interactions?
- 2.2.2 - How ICME-ICME interactions affect the dynamics and structure of ICMEs?
- 2.2.3 - How high-speed solar wind streams (corotating interacting regions) affect ICMEs?
- 2.2.4 - How the ICME-driven shock evolves in the decreasing Alfven-velocity environment?
- 2.3 What is the cause of "problematic" ICMEs, i.e., ICMEs without clear CME counterparts near the Sun?
- 2.4 Can we find examples of front-side full halo CMEs in C2, but have no ICME signatures at 1 AU? Does this kind of event exist or not?
- 2.5 What are event periods which need special attention for linking solar to in situ observations?
- 2.1 Which mechanisms, processes, forces are governing the CME take-off and ICME propagation?
- 3 Future Plan
Scientific Objectives
- Initiation of CMEs and their take-off dynamics ("acceleration stage")
- Heliospheric dynamics of ICMEs and evolution of their structure
- Relationship between empirical, analytical, and numerical propagation models and comparison with observations; forecasting aspects
- CME/ICME-associated phenomena (flares, shocks, etc.)
Scientific Questions
Which mechanisms, processes, forces are governing the CME take-off and ICME propagation?
- What is the role of the flare-associated reconnection?
- What is the role of emerging flux and poloidal-flux injection?
- How long the Lorentz force dominates over the aerodynamic drag
- How the inductive effects affect the CME eruption and ICME propagation?
- What is the role of the ICME/ambient-field reconnection?
How much variable ambient conditions affect ICMEs?
- Which processes are involved in ICME-ICME interactions?
- How ICME-ICME interactions affect the dynamics and structure of ICMEs?
- How high-speed solar wind streams (corotating interacting regions) affect ICMEs?
- How the ICME-driven shock evolves in the decreasing Alfven-velocity environment?
What is the cause of "problematic" ICMEs, i.e., ICMEs without clear CME counterparts near the Sun?
Can we find examples of front-side full halo CMEs in C2, but have no ICME signatures at 1 AU? Does this kind of event exist or not?
What are event periods which need special attention for linking solar to in situ observations?
- interacting events, very fast or very slow CMEs, or other special properties
- late July to early August 2010
- February 2011
- early March 2012
- July 2012
