Spectroscopic survey of galactic O and WN stars. OWN Survey: new binaries and trapezium-like systems

Details Spectroscopic survey of galactic O and WN stars. OWN Survey: new binaries and trapezium-like systems Spectroscopic survey of galactic O and WN stars. OWN Survey: new binaries and trapezium-like systems

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010rmxac..38...30b&link_type=abstract

The Interferometric View on Hot Stars (Eds. Th. Rivinius & M. Curé) Revista Mexicana de Astronomía y Astrofísica (Serie de Confe

Astronomy and Astrophysics

Astronomy

10

Binaries: General, Binaries: Spectroscopic, Stars: Early-Type, Stars: Wolf-Rayet, Techniques: High-Angular Resolution, Techniques: Radial Velocities

Scientific paper

High-angular resolution imaging, speckle, optical or near-infrared interferometric techniques have been used to determine the visual orbits of many nearby bright massive stars. Moreover, the combination of visual orbits and radial-velocity (RV) curves provides a method to derive the true orbit of the system, and hence, masses for each stellar component. The possibility to combine visual/spectroscopic orbits leads to the exploration of wider systems with longer periods (months to years time-scale). We are conducting a spectroscopic monitoring survey of about 240 southern galactic O and WN stars (OWN Survey). More than one hundred stars show RV variations larger than 10 km s^{-1}, allowing us to discover 26 new spectroscopic binaries. One of our goals is to derive RVs with errors lower than 1 km s^{-1}. One of the more remarkable discoveries of the survey is the multiple nature of the O-type system Herschel 36.

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