Speaker
Andrii Sukhorukov
(Institutet för solfysik, Stockholms universitet)
Description
We studied the formation of the most practically important resonance lines such as H
I Ly-a, Mg II k&h, and Ca II K&H in the chromosphere using 3D MHD snapshots produced
by the Bifrost numerical code. For this purpose, we implemented effects of partial
redistribution (PRD) using the hybrid approximation of Leenaarts et al. (2012) into
our radiative transfer code. We discuss some technical and computational difficulties
we face when simulating spectral line formation in PRD. We demonstrate how the most
realistic 3D PRD case is different from traditional but simpler 3D CRD and 1D PRD
approximations by showing separately the roles of PRD and full 3D radiative transfer.
We explain what physical properties of the chromosphere can be inferred from
observations of all these lines. This investigation provides a more realistic
interpretation of observations made by the IRIS satellite, the CLASP rocket
experiment, and the CHROMIS instrument on the SST.
Primary author
Andrii Sukhorukov
(Institutet för solfysik, Stockholms universitet)
