Author： Edelmann H. Heber U. Lisker T. Green E.M.
Publisher： Springer Publishing Company
ISSN： 0004-640X
Source： Astrophysics and Space Science, Vol.291, Iss.3, 2004-01, pp. : 315-319
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
Radial velocity curves have been measured for nine sdB stars from high resolution optical spectra and are found to be sinusoidal indicating that they are binary stars with circular orbits. Their periods range from ≍12 h to more than 8 days. The companions are invisible in optical light. Minimum companion masses are derived from the mass functions, assuming the mass of the sdB primary to be half a solar mass. We argue that the companions to UVO 1735+22, Feige 108, HD 188112, and HD 171858 are white dwarfs, since their (statistically) most likely mass is above ≍0.7
Access to resources
Recommend
