| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 120, Number 3, December II 1996
|
|
|---|---|---|
| Page(s) | 457 - 562 | |
| DOI | https://doi.org/10.1051/aas:1996306 | |
| Published online | 15 December 1996 | |
The λ 3984 feature in late-B spectroscopic binaries*
1
University of Potsdam, Am Neuen Palais 10, D-14469 Potsdam, Germany
2
European Southern Observatory, Casilla 19001, Santiago 19, Chile
Send offprint request to: G. Mathys
Received:
6
March
1996
Accepted:
14
May
1996
We report about a spectroscopic study aimed at searching
the line 
in a sample of 28 spectroscopic
binaries with primaries in the same temperature range as HgMn stars.
One system, HD 75642, shows this line very prominently. In another
system, HD 41040, Hg may be somewhat
overabundant, while
HD 87751 shows marginal Mn and P enhancement.
The present study does not bring a definitive answer to the question
of the relation between binarity, slow rotation, and the appearance of
HgMn anomalies in late B stars, possibly because other effects (like
the influence of a magnetic field), which
could not be taken into consideration, are important too.
In the course of this study,
11 new double-lined spectroscopic binaries were discovered,
10 of which were previously known as single-lined systems.
Of particular interest among them are 4 stars that may have the Si or
He weak peculiarities.
Key words: stars: chemically peculiar / binaries: spectroscopic / stars: rotation
© European Southern Observatory (ESO), 1996