Zapraszamy na seminarium Instytutu Obserwatorium Astronomiczne. Seminaria odbywają się co tydzień, w czwartki o godz. 13:00 w budynku Obserwatorium Astronomicznego UAM przy ul. Słonecznej 36 w Poznaniu.
Data: 21 listopad 2024
Referat wygłosi: prof. UWr. dr hab. Arkadiusz Berlicki (Uniwersytet Wrocławski, Centre of Scientific Excellence – Solar and Stellar Activity)
Tytuł: "Diagnostics of the solar active atmosphere with multiwavelength spectroscopy and numerical simulations"
Streszczenie: Spectroscopic observations and modelling of the solar atmosphere are important tools for understanding its structure and physical processes. Solar atmosphere is an interface between solar interior and the heliosphere, including Earth and its surrounding. Therefore, detailed analysis of the atmospheric composition, magnetic structure, energy transport, heating and dynamics is necessary for proper description of interactions between the processes occurred in the solar interior with those observed in the interplanetary space and related with the Sun. All these processes are significantly stronger during maximum of solar activity. Energetic solar active phenomena, in particular flares or coronal mass ejections (CMEs) significantly increase the radiation and fluxes of energetic particles, which contribute to the so called “Space Weather”.
Analysis of the solar active events is important and require special techniques of observations and simulations. One of the method which seems to be most perspective is non-equilibrium plasma spectroscopy combined with NLTE modelling of different active phenomena. With these methods we hope to understand solar flares, prominences, Ellerman bombs, CMEs and other events as most violent eruptions potentially affecting our planet. Recently, newly obtained solar microwave data from ALMA interferometer provide a new basis for a better understanding of these events. Our research can be also extended for stellar flares commonly observed on active late-type stars where similar, or bigger, sudden eruptions can affect potential exoplanets orbiting around these stars.
Język: jęz. angielski
Forma spotkania: wykład osobisty