The Be star o Cas is indeed the primary of a triple system
Abstract
Analysis of radial velocities of two narrow absorption components in the Mg II 4481 Å line demonstrated that the secondary of the Be star o Cas is indeed a close binary system composed of two B7 stars orbiting each other with a period of 11 . ″ 6604. Orbital solutions and spectral disentangling lead to consistent system properties. The system is extremely important for the research of Be stars since its future interferometric observations with a high spatial resolution could allow the mass and perhaps even the radius of a Be star to be derived without too many model assumptions, mainly on the dynamical grounds.
Fields of Study & Subjects
Stellar
planetary
and galactic studies
Astronomy and Astrophysical Research
Scientific Research and Discoveries
Publication details
- Journal / source
- Astronomy and Astrophysics
- Publisher
- EDP Sciences
- Volume
- 709
- Pages
- A167–A167
- Publication date
- 23 April 2026
- Language
- EN