Periodic Oscillations in Coronal Mass Ejection Kinematics

Solar coronal mass ejections (CMEs) are large scale eruptions of plasma and magnetic field which are propelled into the heliosphere and can interact with the Earth causing adverse space weather. Typical CMEs have velocities between ~200-3500 km s-1, masses in range 1013- 1016 g and magnetic field strengths of tens of nT. The average daily CME rates varies with the 22-year solar cycle from ~5 CMEs per-day at solar max to less than one per-day at solar min.Extensive coronagraph observations have been used to study the kinematics of CMEs Synthetic CME data sampled from known distributions was created and analysed using a number of techniques. The results indicated that methods previously used may over estimate the number of CMEs containing oscillations and their magnitude.Presented at the INAM 2018 http://astrophysics.ie/inam2018/