ION COMPOSITION PROPERTIES IN ICME AND POST-CME CURRENT SHEET
Abstract
Coronal mass ejections (CMEs) are among the most energetic solar events. Solar energetic particles (SEPs) are accelerated at a CME shock. The SEPs, when reaching Earth, can cause severe space weather effects on such as satellites, navigation, communication, and Humans in space. We investigate the heating inside interplanetary coronal mass ejections (ICMEs) using variations of ion composition with Kappa (?) electron velocity distributions, which represents supra-thermal populations. The ion compositions are calculated by using a time-dependent ionization model with various ? values along a post-CME current sheet (CS) as CME erupts. In this work, we investigate 1) what causes the variations in ion charge composition in ICMEs and how are they related to the physical conditions at the magnetic reconnection site 2) what is range of ? values that can explain the observed ion charge composition structure inside ICMEs and what will be the most probable heating and acceleration process to satisfy the observed ion composition structure inside ICMEs 3) what the ? values tell us the supra thermal populations in the source regions and ICMEs that can be useful in forecasting the peak intensities of SEP events. This work impacts the increase of knowledge for suprathermal particle populations in the solar-terrestrial environment and lead to learning the more proper interpretation of the physical process of heating and acceleration of erupting plasma.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 11, 2021
- Source ID
- FA23862014031
Entities
People
- Jin-yi Lee
Organizations
- Air Force Office of Scientific Research
- Kyung Hee University
- United States Air Force