The Abundances of the Elements in the Solar Photosphere--IV: The Iron Group

Abstract

Abundances of the iron group elements are derived from ionic lines in the photospheric absorption spectrum. There is very good agreement with abundances found from neutral species for all except Co and Ni. The latter discrepancies are thought to arise from uncertainty in the absolute scales of the f -values and from difficulties in interpretation of ultra-violet line strengths. The general good agreement supports the assumption of local thermo-dynamical equilibrium for the calculation of the ionization state of the solar photosphere.