Recent coudé spectroscopy of HD 187399 is reported and the orbital elements of the single-lined binary redetermined. It is suggested that the primary fills its Roche lobe and loses mass at periastron, and that the system corresponds to a case B of mass-exchange. The secondary appears to be more massive and observationally undetectable. The possibility of its being a black hole is discussed.
- 1 - natural sciences ; 2 - physics & astronomy ; 3 - astronomy & astrophysics
- 1 - Physical Sciences ; 2 - Earth and Planetary Sciences ; 3 - Space and Planetary Science
- 1 - Physical Sciences ; 2 - Physics and Astronomy ; 3 - Astronomy and Astrophysics