CAOSP abstracts, Volume: 27, No.: 3, year: 1998
- Author(s): RYABCHIKOVA, T.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 27, no. 3, p. 319-323.
- Date: 04/1998
- Title: Abundance analysis of SB2 binary stars with HgMn primaries
- Keyword(s): STARS: BINARIES: SPECTROSCOPIC, STARS: ABUNDANCES
- Pages: 319 -- 323
We present a short review of the abundances in the atmospheres of SB2
systems with Mercury-Manganese (HgMn) primaries. Up to now a careful study
has been made for both components of 8 out of 17 known SB2 binaries with
orbital periods shorter than 100 days and mass ratio ranging from 1.08 to
2.2. For all eight systems we observe a lower Mn abundance in the secondary's
atmospheres than in the primary's. Significant difference in the abundances
is also found for some peculiar elements such as Ga, Xe, Pt. All secondary
stars with effective temperatures less than 10 000 K show abundance
characteristics typical of the metallic-line stars.
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