CAOSP abstracts, Volume: 27, No.: 3, year: 1998
- Author(s): WAHLGREN, G.M.; DOLK, L.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 27, no. 3, p. 314-318.
- Date: 04/1998
- Title: Hot-Am stars as intermediary objects to the HgMn and Am stars
- Keyword(s): STARS: ABUNDANCES, STARS: CHEMICALLY PECULIAR
- Pages: 314 -- 318
We describe the early results of an investigation into the spectral
characteristics of the hottest Am stars (A0 - A2) in an attempt to link
the HgMn and Am classes of chemical peculiarity. A limited sample of hot-Am
stars was searched for the presence of lines from the very heavy elements
platinum and mercury, as well as a search for lines from the rare-earth
elements in HgMn stars. Our analysis of the strong optical platinum and
mercury lines in the spectrum of the HgMn star HR 7775 has detected isotopic
shifts that are different from those found at ultraviolet wavelengths and,
in the case of mercury, vary with ionization stage.
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