Abstract Details
| Name: Aveek Sarkar Affiliation: PRL, Ahmedabad Conference ID: ASI2018_1449 Title : Numerical Simulation of active region MHD oscillations and coronal loop implosion Authors and Co-Authors : Bhargav Vaidya, Soumitra Hazra, Jishnu Bhattacharyya Abstract Type : Contributed Talk Abstract Category : Sun and the Solar System Abstract : We simulate a part of the solar active region which is hit by a flare like explosive event. We carefully trace magnetic field lines of the active region and their time evolution. It is found that field lines of the active region demonstrate various compressible MHD modes such as sausage and kink. We also see that following the flare disturbance, such magnetic field structure collapse (formally known as coronal loop implosion) or oscillate vertically depending on the nature of the local plasma beta. Contrary to common believe, the present model shows that loop implosion is an independent ideal magnetohydrodynamic (MHD) effect. It is initiated by variations of the system coordinates arising due to the transmitted disturbance originating at the event site, but otherwise has no connection to the flaring site itself. |