<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Be binary stars with hot, compact companions"^^ . "In this study the importance of close binary evolution for Be star formation was investigated. The Be star 59 Cygni was confirmed to be an evolved binary with a sdO companion. The companion was confirmed by a weak helium II absorption. Orbital elements and stellar masses were determined. In the spectrum of 59 Cygni, characteristic features were identified. These are a single-peaked emission component, a phase-locked V/R variability, and a \"knotty\" structure of the absorption lines. According to Stefl et al. (2000), these features are caused by a hot, compact companion (sdO or WD) that photoionizes a sector of the disc of the Be star. Assuming this model and a code of Hummel and Stefl (2001) the emission variability of 59 Cygni was successfully reproduced. The features, observed in the spectrum of 59 Cygni, were confirmed for the Be+sdO binary phi Persei and for HR2142, too. Hence, these features were taken as indicators for Be binaries with hot, compact companions. HR2142 was confirmed to be a Be+sdO binary. The spectral variability of further candidates was examined. It was suggested that FY CMa is a Be+sdO binary and that kappa Draconis is a Be+WD binary. The assumption that a fraction of the Be stars formed by mass and angular momentum transfer in close binary systems was confirmed."^^ . "2003" . . . . . . . . "Monika"^^ . "Maintz"^^ . "Monika Maintz"^^ . . . . . . "Be binary stars with hot, compact companions (PDF)"^^ . . . "Monika_Maintz_Dissertation.pdf"^^ . . . "Be binary stars with hot, compact companions (Other)"^^ . . . . . . "small.jpg"^^ . . . "Be binary stars with hot, compact companions (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Be binary stars with hot, compact companions (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Be binary stars with hot, compact companions (Other)"^^ . . . . . . "lightbox.jpg"^^ . . "HTML Summary of #4343 \n\nBe binary stars with hot, compact companions\n\n" . "text/html" . . . "520 Astronomie"@de . "520 Astronomy and allied sciences"@en . .