Abstract
MHD wave activity associated with a flare was observed in coronal active region AR 8270 in the extreme ultraviolet (EUV) by the Transition Region and Coronal Explorer (TRACE) satellite on 1998 July 14. In this study, a three-dimensional MHD model of the active region field was initialized using a National Solar Observatory (NSO) Kitt Peak magnetogram and potential extrapolation of the magnetic field, together with gravitationally stratified density. To model the observed wave activity following the flare, a velocity pulse was launched into a model active region from below. It was found that the global oscillations in the model active region are in good qualitative agreement with observations. The main difference between the observations and the model is in the oscillation of several individual loops that damp on longer timescales compared to the corresponding magnetic field line oscillation damping in the model.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
