Contributed Talk - Splinter Solar

Wednesday, 23 September 2020, 12:28   (virtual room L)

Inference of log(gf) values for atomic lines in UV spectral range

D. Vukadinović, A. Lagg, S. Narayanamurthy, S. Solanki, B. Ruiz Cobo, C. Quintero Noda, R. Gafeira
MPI for Solar System Research; Instituto de Astrofísica de Canarias; CITEUC

The third flight of the Sunrise observatory carries the new Sunrise UV Spectropolarimeter and Imager (SUSI) which will cover the spectral range from 310 nm to 410 nm. In this region, the number density of spectral lines is at least four times larger than in the visible / infrared part of the spectrum, including a significant number of chromospheric lines. To extract accurate physical parameters of the solar atmosphere from observations with SUSI we need precise atomic line parameters, e.g., the log (gf) value. Here we review the first step of using high-quality spectra for inferring the log (gf) values of lines in the SUSI wavelength range using 1D mean solar models of the Sun. Additionally, we discuss the potential of a coupled fitting of the atomic line parameters between different atmospheres using synthetic data created from 3D realistic magnetohydrodynamic simulations.