Astron. Astrophys. Suppl. Ser. 139, 617-623

The stark broadening effect in hot star atmospheres: Au I and Au II lines

L.C. Popovic - M.S. Dimitrijevic - D. Tankosic

Send offprint request: L.C. Popovic,
e-mail: lpopovic@aob.bg.ac.yu

Astronomical Observatory, Volgina 7, 11000 Belgrade, Yugoslavia

Received January 27; accepted June 16, 1999

Abstract:

The Stark broadening parameters for six Au I lines and eight Au II transitions have been calculated. Two methods for calculation have been used: the semiclassical method (for Au I lines) and the modified semiempirical approach (for Au II transitions). In the case of Au II, the jj coupling approximation has been used for the matrix-element calculations. The importance of the electron-impact effect in the case of Au II $\lambda=174.0476$ nm line for several stellar atmosphere models has been tested.

Key words: atomic processes -- line formation -- stars: atmospheres -- stars: early-type