Astronomy and astrophysics

PhD-defence: "Measuring the solar atmosphere"

by Jaime de la Cruz Rodríguez (Astronomy department / SU)

Europe/Stockholm
FB42

FB42

Description
Polarimetric measurements of the solar chromosphere are exceedingly difficult. Taking advantage of newly developed instrumentation, we challenge for the first time the notion that chromospheric fibrils are tracing the magnetic field. Furthermore, a 3D numerical simulation is used to determine to what extent physical quantities in the chromosphere can be inferred using non-LTE inversions of Ca II lines. Additionally, we have developed new calibration/restoration techniques for data acquired with the new CRISP instrument and a method for accurate velocity calibrations based on a 3D numerical simulation.