25-08-2017, 09:32 PM
3D MHD Models of Active Region Loops
ABSTRACT
Present imaging and spectroscopic observations of active region loops allow to determine many physical parameters of
the coronal loops, such as the density, temperature, velocity of flows in loops, and the magnetic field. However, due to
projection effects many of these parameters remain ambiguous. Three dimensional imaging in EUV by the STEREO
spacecraft will help to resolve the projection ambiguities, and the observations could be used to setup 3D MHD models of
active region loops to study the dynamics and stability of active regions. Here the results of 3D MHD models of active region
loops are presented, and the progress towards more realistic 3D MHD models of active regions. In particular the effects of
impulsive events on the excitation of active region loop oscillations, and the generation, propagations and reflection of EIT
waves are shown. It is shown how 3D MHD models together with 3D EUV observations can be used as a diagnostic tool for
active region loop physical parameters, and to advance the science of the sources of solar coronal activity.