The next STELLAR seminar lecture will be by Dr. Diana Morosan of University of Helsinki. Her online seminar will be held on Thursday, December 22 2022, at 13:00h CET, over Zoom (connection details below).
“The Nature and Origin of Moving Solar Radio Bursts Associated With Coronal Mass Ejections on the Sun”
Dr. Diana Morosan
University of Helsinki
Flares and coronal mass ejections (CMEs) from the Sun are the most powerful and spectacular explosions in the solar system, capable of releasing vast amounts of magnetic energy over relatively short periods of time. These phenomena are often associated with particle acceleration processes that are often observed directly by spacecraft here at Earth. At the Sun, there are no direct methods of measuring these particles, which is necessary to predict their origin and propagation direction through the heliosphere. However, accelerated particles, in particular fast electrons, can generate emission at radio wavelengths through various mechanisms. Here, I will present radio observations of various types of radio bursts that accompany CME eruptions on the Sun, in particular radio bursts that show movements with the CME expansion in the low solar corona. Using multi-wavelength analysis and reconstructions of the radio emission and CME in three dimensions, we can better determine the sources, locations, and propagation directions of fast particles during these eruptions.