Abstract Details
| Name: Pritam Das Affiliation: Aryabhatta Research Institute of Observational Sciences Conference ID: ASI2025_691 Title : Kinematics of CMEs in the Middle Corona Authors and Co-Authors : Pritam Das, Vaibhav Pant Abstract Type : Poster Abstract Category : Sun, Solar System, Exoplanets, and Astrobiology Abstract : The middle corona, spanning from 1.5 to 6 solar radii from the solar disk centre, is a critical transition zone between the inner and outer corona, bridging two distinct physical regimes. Though its boundaries have been debated for years, recent community efforts (West, M.J. et al., 2023) have established this standard definition. This region is known for hosting some of the most dynamic solar phenomena, particularly Coronal Mass Ejections (CMEs), whose impulsive acceleration often occurs within the middle corona. Despite its significance, this region has been understudied due to observational challenges faced by major solar missions. In our study, we leverage data from SUVI-ECI (GOES-R), KCor (MLSO), and LASCO (SOHO). The off-pointing campaign of SUVI-ECI provides EUV observations up to 5 solar radii, offering valuable overlap with KCor and LASCO in white light. Our results reveal distinct kinematic profiles of CMEs in EUV versus white light, underscoring the different dynamics across wavelengths. Additionally, we employ a state-of-the-art optical flow technique to analyze the velocity profiles across different CME locations. This method generates a heat map of velocity magnitudes and overlays flow vectors directly onto the CME images, providing a detailed view of the dynamics within the middle corona. We plan to enhance this approach with a machine learning model, which will ultimately serve as a robust tool for automated CME detection—advancing real-time monitoring capabilities for eruptive solar phenomena. |