A search for spectroscopic binaries among Herbig Ae/Be stars
Abstract
We present the results of a spectroscopic survey of binaries among 42 bright (m_V<11) Herbig Ae/Be stars in both hemispheres. Radial velocity variations were found in 7 targets, 4 are new spectroscopic binaries. The Li I 6 708 Angstroms 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 (P<100 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%. 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. Table 1 only available in electronic form at CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.html
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- May 1999
- DOI:
- 10.1051/aas:1999225
- Bibcode:
- 1999A&AS..136..429C
- Keywords:
-
- BINARIES: SPECTROSCOPIC;
- STARS: EARLY-TYPE;
- STARS: PRE-MAIN SEQUENCE;
- STARS: STATISTICS