Abstract Details
| Name: Nishtha Sachdeva Affiliation: Indian Institute of Science Education and Research, Pune Conference ID: ASI2016_416 Title : Propagation of Coronal Mass Ejections Authors and Co-Authors : Prasad Subramanian Indian Institute of Science Education and Research (IISER), Pune. Abstract Type : Poster Abstract Category : Sun and the Solar System Abstract : We aim to understand the contributions of driving and drag forces on Coronal Mass Ejections (CMEs) ejected from the Sun. Observations of CME kinematics are derived from STEREO data fitted to the Graduated Cylindrical Shell (GCS) model. We use a physical prescription for the aerodynamic drag experienced by CMEs as they travel from the Sun to the Earth. We find that the kinematics of relatively slow CMEs are dominated by solar wind drag only beyond 15--50 solar radii. They are likely propelled by Lorentz forces below these distances. We attempt to understand the details of these Lorentz driving forces using the popular torus instability model. Taken together, our work will form the basis of a comprehensive, physics-based model for the dominant forces responsible for Sun-Earth CME propagation. |