engleski

Formation and evolution of large-amplitude waves in the Solar corona

Impulsive expansion of coronal mass ejections frequently results in the formation of global MHD wave in the solar corona. Such a large-amplitude disturbance is often observed as a EUV coronal wave and chromospheric Moreton wave. We present results of numerical simulations linking the low-coronal signatures of the wave with its chromospheric counterpart. The coronal wave is created by an explosive eruption of the coronal arcade that is anchored in the chromosphere/photosphere. Results of simulations are quantitatively analyzed and confronted with the observations, as well as with results of a simple analytical modeling. It is shown that the lateral expansion of the arcade is viable of creating the coronal wave, having characteristics that are fully consistent with the observations. This work has received funding from European Physical Society and the European Commission FP7 Projects eHEROES (284461) and COMESEP (263252).

Shock waves ; Magnetohydrodynamics (MHD) ; Sun: corona ; Sun: coronal mass ejections (CMEs)

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