Strong Zeeman effects in the Fe I 5434.5 Å line observed in a sunspot on August 17, 2024

Ivan I. Yakovkin, Vsevolod G. Lozitsky

The Fe I 5434.5 Å line is widely used as a non-magnetic reference due to its small effective Landé factor of $-0.014$. Nevertheless, this line can show significant non-zero Stokes…