The identification of high-level transitions of Fe II in stellar spectra

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Peculiar Stars, Stellar Atmospheres, Stellar Spectra, A Stars, B Stars, Iron, Line Spectra

Scientific paper

Positive identifications are made in four B and A-type stellar spectra of lines from 3d6(5D)4d-3d6(5D)4f transitions in Fe II. The lowest levels of the 4d terms have excitation energies of 10.3 eV, while those of the 4f terms are at 12.8 eV. Numerous features that were previously unidentified in B and A stars may now be explained. The obvious presence of such transitions makes it probable that many other high-level transitions are present in stellar spectra. Some of these transitions have not yet been identified in laboratory studies analyses, but they could be of considerable importance in the chemical analyses of stellar atmospheres.

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