Speaker
Description
First Name: Ramada
Last Name: Sukarmadji
Affiliation: Institut de Recherche en Astrophysique et Planétologie
All Authors: Ramada Sukarmadji, Victor Réville, Bahaeddine Gannouni, Alexis Rouillard, Chuanpeng Hou, Jean Kempf
Abstract: Magnetic inversions known as switchbacks and velocity spikes have been ubiquitously observed in solar wind observations from the Parker Solar Probe and Solar Orbiter. Previous studies have suggested that they are formed due to interchange reconnection in the solar corona, from jetlets originating from small bipoles located at the base of coronal plumes. The observed velocity spikes have also been found to have periodicities on the order of minutes, but the underlying mechanism that produces these periodicities remains unclear. In this study, we present 2.5D MHD numerical modelling results using the IDEFIX code of a magnetic bipole emergence leading to microjets, and investigate the effects of a p-mode-like driver at one of the bipoles. P-modes have been commonly observed in the solar corona with similar periodicities on the order of minutes, which raises the question of whether they play a role in influencing the periodicities of the observed velocity spikes. We present our results comparing the emergence dynamics and resulting velocity spikes from reconnection at the base of the jet with and without the p-mode driver. Results show that the p-modes produce velocity spikes with the driver’s periodicity, while increasing the number of reconnection events during the emergence event. We will also show preliminary results of the Oxygen ion abundances obtained from solving the ion-charge state ratio through implementing them in the tracer variables of the code, to see which ions are typically associated with the jets.