Expositora: Rebecca Meadowcroft (Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, England)

Fecha: viernes 8 de agosto, 11:30 hs.

Resumen: Propagating slow magnetoacoustic waves, observed as intensity disturbances in extreme ultraviolet (EUV) emission, are powerful tools for magnetohydrodynamic (MHD) seismology. Their dispersive properties, phase speeds, and damping characteristics allow us to infer fundamental parameters such as temperature and magnetic field structure in coronal plasmas. These waves are persistent, quiescent, and almost harmonic in the corona, making them ideal probes of the outermost layer of the solar atmosphere.

In this talk, I will present recent work using observations of slow waves from SDO/AIA and SolO/EUI-HRIEUV, and discuss the implications of our findings. I will show how we determine wave parameters, such as oscillation period, projected wave speed, and decay length, using time-distance analysis. From these, we infer the direction of the magnetic field and link the coronal waves to oscillations observed in the chromosphere. These results demonstrate how propagating slow waves can be used as diagnostic tools in MHD seismology to probe the structure and dynamics of the solar atmosphere.