Winking flux ropes after Moreton wave event

ZURBRIGGEN, E.; CÉCERE, M.; KRAUSE, G.; COSTA, A.; FRANCILE, C.

Buenos Aires, Argentina

Congreso; 11 th Latin American Conference on Space Geophysics; 2018

Moreton waves are large-scale solar perturbations propagating at chromosphericlevel, travelling distances of 500 Mm with speeds in the range of 500-2000 km/s. After theoccurrence of Moreton events, some observations have reported high intensity oscillations ofsurrounding flux ropes (Francile et al. 2013, A&A 552, A3). Observations have also suggested this flux rope winking is due to the passage of Moreton wavefront. We study whether the winkintensities is either caused by the flux rope oscillatory motions generated by the wavefrontpassage, or by changes in the flux rope plasma-parameters. By means of 2D MHD simulationsconsidering a chromosphere and a stratified corona, we model a typical flux rope magneticconfiguration in initial pseudo-equilibrium (Krause et al. 2017, MNRAS 474), we analyze dif-ferent plasma-parameters ́values and Moreton wavefront?s intensities in order to reproduce theobservations. A blast wave deposition is used to emulate a Moreton wavefront. The obtainedresults and comparison with observations are present.