| Abstract : | The middle corona is a critical transition region between the highly disparate physical regimes of the inner and outer solar corona. The boundaries of the region have been debated for many years. Nevertheless, through a series of open community meetings and extensive discussions, a standard set of boundaries to define the middle corona was agreed upon. The middle corona was defined from 1.5 to 6 solar radii (measured from the disk centre) (West, M.J. et al., Defining the Middle Corona, 2023). The solar wind, eruptions, and flows pass through the region and are shaped by it. Notably, the region also modulates inflow from above that can drive dynamic changes at lower heights in the inner corona. Furthermore, the most prominent and energetic structures to pass through the middle corona are CMEs. Impulsive CME acceleration is known to occur in the middle corona.
Nonetheless, because it is challenging to observe, the middle corona has been poorly studied by both major solar remote sensing and in-situ missions and instruments. Thanks to recent advances in instrumentation, observational processing techniques, and a realisation of the region's importance, interest in the middle corona has increased. In this project, we have utilised the data from SUVI (GOES-R), KCor (MLSO), and LASCO (SOHO), each having their own advantage, to profile the kinematics of three different types of CMEs (Slow, Intermediate, and Fast). We created time-distance maps from each instrument and then combined their data to shape their velocity and acceleration profiles. The results of this project will help us understand the nature of CME kinematics as it passes through the Middle Corona. |
