| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 136, Number 3, May I 1999
|
|
|---|---|---|
| Page(s) | 429 - 444 | |
| DOI | https://doi.org/10.1051/aas:1999225 | |
| Published online | 15 May 1999 | |
A search for spectroscopic binaries among Herbig Ae/Be stars *,**
Laboratoire d'Astrophysique de l'Observatoire de Grenoble, BP. 53, F–38 041 Grenoble Cedex, France
Send offprint request to: P. Corporon
Received:
4
March
1998
Accepted:
17
November
1998
We present the results of a spectroscopic survey of binaries among 42
bright (
) Herbig Ae/Be stars in both hemispheres. Radial
velocity variations were found in 7 targets, 4 are new spectroscopic
binaries. The LiI 6 708 Å absorption line (absent feature in simple
HAeBe stars spectra) indicates the presence of a cooler companion in 6
HAeBe spectrum binaries, 4 of which are new detections. Few stars
classified as possible Herbig Ae/Be stars are not confirmed as such.
While for short-period (
days) spectroscopic binaries, the observed
binary frequency is 10%, the true spectroscopic binary frequency for
Herbig Ae/Be stars may be as high as 35%.
Key words: binaries: spectroscopic / stars: early-type / stars: pre-Main Sequence / stars: statistics
Based on observations collected at the European Southern Observatory (ESO), La Silla, Chile and at the Observatoire de Haute–Provence (OHP), Saint–Michel l'Observatoire, France.
© European Southern Observatory (ESO), 1999