Total eclipse spectroscopy of visible light coronal emission lines

Currently a missing link in solar physics, the region ~1.2 to 2.5 solar radii is a difficult area to observe due to various technological limitations of both ground and space-based instruments. Thus, observations of narrow-band visible light spectral data from the 2 July 2019 at 20:40 UTC total solar eclipse in Rodeo, Argentina provides a rare opportunity to diagnose the low atmosphere. The data was gathered as three narrow bands of visible light centered on emission lines of ionized Fe atoms. Respectively, they represent the temperature range common in the low solar atmosphere: Fe X (0.9 MK), Fe XI (1.3 MK), and Fe XIV (1.9 MK). These measurements will eventually allow for the creation of an accurate temperature map which will reveal a deeper understanding of the physics involved in various atmospheric phenomena. The work presented here describes the spectroscopic data reduction process, as well as preliminary diagnostics of temperature, and relative ionization state abundance. The high spectral resolution of the instrument allows a measurement of the Doppler shift of the extended corona due to solar rotation.