A Near-half-century Simulation of the Solar Corona

Aslanyan, Valentin; Meyer, Karen A.; Scott, Roger B.; Yeates, Anthony R.

Abstract

We present an overview of results from a magnetofrictional model of the entire solar corona over a period of 47 yr. The simulation self-consistently reproduces decades of solar phenomena, varying in duration between rapid eruptions and the long-term solar cycles, from an input of observed active regions emerging at the photosphere. We have developed a geometric approach to use magnetic helicity to identify and localize the frequent eruptions that occur in the simulation. This method allows us to match our results to extreme-ultraviolet observations of transient events. We have analyzed the evolving magnetic topology by computing the squashing factor and segmenting the corona into discrete magnetic domains bounded by the Separatrix-Web. The simulations show a more dynamic structure to the Separatrix-Web than is predicted by potential field models, which may explain solar wind observations.

Citation

Aslanyan, V., Meyer, K. A., Scott, R. B., & Yeates, A. R. (2024). A Near-half-century Simulation of the Solar Corona. Astrophysical Journal Letters, 961(1), Article L3. https://doi.org/10.3847/2041-8213/ad1934

• Journal Article Type: Article
• Acceptance Date: Dec 28, 2023
• Online Publication Date: Jan 11, 2024
• Publication Date: Jan 20, 2024
• Deposit Date: Jan 16, 2024
• Publicly Available Date: Jan 16, 2024
• Journal: The Astrophysical Journal Letters
• Print ISSN: 2041-8205
• Electronic ISSN: 2041-8213
• Publisher: American Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 961
• Issue: 1
• Article Number: L3
• DOI: https://doi.org/10.3847/2041-8213/ad1934
• Keywords: Solar corona, Solar prominences, Solar physics, Solar coronal mass ejections, Solar cycle
• Public URL: https://durham-repository.worktribe.com/output/2120385