No CrossRef data available.
Published online by Cambridge University Press: 04 August 2017
The importance of close binaries in the domain of luminous objects is examined. The group of unevolved massive stars of O- and B-type, the groups of Wolf-Rayet binaries and X-ray binaries are discussed, and limits on the mass ratios, masses and periods are listed, as well as the average values. The connections between these various groups are investigated, and relations among subgroups are established.