Astrophysics Webinar By Manuela Temmer on Space Weather research and modeling

Speaker: Manuela Temmer

Affiliation: Institute of Physics, University of Graz, Austria

Date & Time: Tuesday 01 March 2022 at 4:00 PM IST

Title: Space Weather research and modeling

Abstract: The Sun is an active star that influences the Earth as well as the entire solar system. Most dynamic phenomena on the Sun are observed as coronal mass ejections (CMEs) and flares. CMEs present massive clouds of magnetized plasma having speeds up to a few thousand km/s, that may propagate over Sun-Earth distance within less than a day and may cause strong geomagnetic disturbances at Earth (Space Weather). As CMEs are optically thin, using remote sensing data measurements of intrinsic properties such as speed, width, propagation direction, density etc. are severely affected by projection effects. By combining image data with in-situ measurements, valuable information about the CME 3D structure is provided and how it evolves in interplanetary space. A better understanding of the physical processes involved in the interaction between solar wind flow and CMEs enable us to validate models for further development. The talk will cover CME-flare phenomena and the interplanetary propagation behavior of CMEs related to the background solar wind, and how to tackle Space Weather forecasting with models.



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