CESRA Workshop 2019

July 8th - 12th, 2019

Telegrafenberg, Potsdam, Germany


Dispersive fast wave trains in magnetically coupled atmosphere above a sunspot and coronal heating problem

Hana Meszarosova, Astronomical Institute of the Czech Academy of Sciences

Flare magnetic field energy transferred to the solar outer atmosphere by magnetohydrodynamic waves can help solve the coronal heating problem. There is an unclear mechanism of wave transfer from the photosphere without a dissipation/reflection before reaching the corona and a mechanism of the wave energy distribution over corona outside the original waveguide. We report about flare plasma flows accompanied with impulsively generated fast magnetoacoustic wave trains propagating in cylindrical plasma waveguides. A common behaviour of the (E)UV plasma flows and wave trains in all atmospheric layers was observed by SDO/AIA and IRIS space instruments. Magnetically coupled solar atmosphere above a sunspot umbra was assumed. The solar seismology with trapped, leakage, and excited modes of the dispersive waves (dissipating especially in the solar corona) is discussed with respect to their possible contribution to the outer atmosphere heating.