Seminar by Dr. Yajie Chen (MPS)
Title: Forward Modeling of Solar Coronal Magnetic Field Diagnostics
Abstract:
Solar coronal magnetic field is the key to understanding phenomena in the corona. However, coronal magnetic field measurements are very challenging. Recently, the magnetic-field-induced transition (MIT) theory was proposed to achieve routine coronal magnetic field measurements, but its suitability has not been validated. Based on synthetic data acquired through numerical simulations we developed a method to simultaneously estimate coronal temperature and density and demonstrated that the MIT theory can provide reasonable coronal magnetic field measurements in solar active regions. Coronal magnetic field diagnostics in the quiet Sun regions are more difficult. We constructed the first numerical model of campfires, prevalent small-scale transient brightenings recently described in EUV images taken by Solar Orbiter. By examining the magnetic field structures around campfires, we suggested that campfires are likely generated through component reconnection between interacting coronal loops or untwisting of flux ropes. These results shed light on coronal magnetic field diagnostics and help us better understand the dynamics in the quiet solar corona.
Where: The seminar can be followed in person in building 200B, room 02.18 or online at the following link:
https://eu.bbcollab.com/guest/6fc7259fc2ba4f29af721ccb6a19eefd
