Dysprosium III lines in the spectra of peculiar A and B stars

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Abstract
It is demonstrated that the Dy III line list from the laboratory study of Hussain (1973) represents pure Dy but in many stages of ionization; when known Dy I and Dy II lines are purged from this list, many of the remaining lines coincide with hitherto unidentified lines in the hotter Ap and Pb stars, notably for HR 465 at rare earth maximum. A search list of 34 relatively unblended lines of Dy III is proposed, and the Dy III spectrum is shown to be present in about 16 well-known chemically peculiar stars.Peer reviewed: YesNRC publication: Ye

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