(Poster) Flux rope winking intensity after a Moreton wave event

KRAUSE, G.; ERNESTO ZURBRIGGEN; ANDREA COSTA; MARIANA CÉCERE

Buenos Aires

Conferencia; COLAGE XI; 2018

ALAGE

Moreton waves are large-scale solar perturbations propagating at chromospheric level, travelling distances of ~500 Mm with speeds in the range of [500-2000]km/s. After the occurrence of Moreton events, some observations have reported high intensity oscillations of surrounding 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 wink intensities is either caused by the flux rope oscillatory motions generated by the wavefront passage, or by changes in the flux rope plasma-parameters. By means of 2D MHD simulations considering a chromosphere and a stratified corona, we model a typical flux rope magnetic configuration in initial pseudo-equilibrium (Krause et al. 2017, MNRAS 474), we analyze different plasma-parameters´ values and Moreton wavefront´s intensities in order to reproduce the observations. A blast wave deposition is used to emulate a Moreton wavefront. The obtained results and comparison with observations are present.