Speaker
Description
First Name: Samantha
Last Name: Wallace
Email Address: samantha.wallace@erau.edu
Affiliation: Embry-Riddle Aeronautical University
All Authors: Samantha Wallace, Natalia Zambrana Prado, Nicholeen M. Viall, Peter Young, Therese A. Kucera, Susan T. Lepri, Stephanie L. Yardley, Vincenzo Andretta, David Lario, Spiro Antiochos, Charles N. Arge, Samuel J. Schonfeld, Carl J. Henney
Abstract: In this work, we leverage multiple Solar Orbiter (SO) capabilities and coronal modeling to investigate the origins and formation of the solar wind and SEPs. We focus on a 6-day interval (2022 March 4–9) when SO was radially aligned with Earth, characterizing mesoscale solar wind structures observed in SO/HIS Fe/O and O⁷⁺/O⁶⁺ ratios and confirming their survival to L1. We use the ADAPT-WSA model to characterize the solar wind sources (e.g., S-web origin), and to relate the Fe/O observed at SO/HIS, with S/O abundances derived by SO/SPICE. We find that solar wind originating from only one of the four SPICE rasters can be interpreted as plasma originating from open fields. The solar wind from the other three require a different interpretation, and we suggest interchange reconnection as the most natural solution. We close with highlighting recent work which uses the same modeling approach to identify the sources of mesoscale downflows observed by SO/METIS at high latitudes, and of widespread SEP events observed at multiple spacecraft. We compare results with and without the inclusion of far-side SO/PHI data to drive WSA, and demonstrate that far-side data assimilation is necessary to accurately derive the global S-web topology and magnetic connectivity, highlighting the need for global photospheric field coverage.