A near-real-time data-assimilative model of the solar corona

• 成果类型: Article
• 署名作者: Downs, Cooper; Linker, Jon A.; Caplan, Ronald M.; Mason, Emily I.; Riley, Pete; Davidson, Ryder; Reyes, Andres; Palmerio, Erika; Lionello, Roberto; Turtle, James; Ben-Nun, Michal; Stulajter, Miko M.; Titov, Viacheslav S.; Toeroek, Tibor; Upton, Lisa A.; Attie, Raphael; Jha, Bibhuti K.; Arge, Charles N.; Henney, Carl J.; Valori, Gherardo; Strecker, Hanna; Calchetti, Daniele; Germerott, Dietmar; Hirzberger, Johann; Suarez, David Orozco; Rodriguez, Julian Blanco; Solanki, Sami K.; Cheng, Xin; Wu, Sizhe
• 署名单位: Southwest Research Institute; National Aeronautics & Space Administration (NASA); NASA Goddard Space Flight Center; George Mason University; United States Department of Defense; United States Air Force; Max Planck Society; Consejo Superior de Investigaciones Cientificas (CSIC); CSIC - Instituto de Astrofisica de Andalucia (IAA); University of Valencia; Nanjing University
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-10321
• DOI: 10.1126/science.adq0872
• 发表日期: 2025-06-19
• 页码: 1306-1310
• 关键词: evolution; FIELDS; sun

摘要

The Sun's corona is its tenuous outer atmosphere of hot plasma, which is difficult to observe. Most models of the corona extrapolate its magnetic field from that measured on the photosphere (the Sun's optical surface) over a full 27-day solar rotational period, providing a time-stationary approximation. We present a model of the corona that evolves continuously in time, by assimilating photospheric magnetic field observations as they become available. This approach reproduces dynamical features that do not appear in time-stationary models. We used the model to predict coronal structure during the total solar eclipse of 8 April 2024 near the maximum of the solar activity cycle. There is better agreement between the model predictions and eclipse observations in coronal regions located above recently assimilated photospheric data.