Petrova, Elena ; Van Doorsselaere, Tom ; Berghmans, David ; Magyar, Norbert ; Parenti, Susanna ; Valori, Gherardo ; Plowman, Joseph

Invited talk presented at 11th Coronal Loop Workshop on 2024-06-25

Abstract: The ability to detect certain phenomena on the Sun is prescribed by the capabilities of our instrumentation. Throughout history, launching satellites equipped with cutting-edge instruments has consistently expanded our understanding of solar physics. Launch of the Solar Orbiter is not an exception and since its launch already there have been a lot of new discoveries specifically focused on small scales such as for example campfires or picojets. In this talk, I will delve into two recent studies that we've done utilizing data from the High- Resolution Imager in the Extreme Ultraviolet telescope (HRIEUV) onboard Solar Orbiter and discuss how those works fit and contribute into our current understanding of the waves. The first study focuses on the detection of high-frequency decayless kink oscillations in small loops in a quiet region of the Sun. Due to the unprecedented imaging cadence of the corona, we were able to detect oscillations with periods that are shorter than the previously observed range, hinting at a significant energy budget associated with these phenomena. The second one is related to detection of torsional Alfvén waves in a fan-spine topology. In this work we combine the observations from several instruments onboard Solar Orbiter, namely mentioned already HRIEUV, PHI and SPICE. This is the first time we see signatures of propagating torsional motion in corona as observed by the three instruments onboard Solar Orbiter.

Keyword(s): waves ; corona ; EUV ; Solar Orbiter
Links: link; link2