Insights into Coronal Mass EjectionShocks with the Irish Low FrequencyArray (I-LOFAR)

Ciara Maguire, Dubin Institue for Advanced Studies , Trinity College Dublin

The Sun can produce large-scale energetic events such as solar flares and coronal mass ejections (CMEs) which can excite shock waves that propagate through the corona. To date, the shock kinematics responsible for particle acceleration and emission at radio wavelengths are not well understood. Here, we investigate these phenomena using radio observations of the 2017 September 2, C7.7 solar flare at 10-240 MHz from Irish Low Frequency Array (I-LOFAR, www.lofar.ie). We investigate the relationship between the features in I-LOFAR’s dynamics spectra and the shock kinematics as derived from imaging observations using the GOES/SUVI and SOHO/LASCO C2. We calculated the shock Mach number from both shock geometry in SUVI and modelling of coronal Alfvén speed. The relationship between shock characteristics from SUVI and data driven modelling are compared to shock characteristics from radio in order to determine the plausibility of shock accelerated electron release into the solar corona.