Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21841016i&link_type=abstract
American Astronomical Society, AAS Meeting #218, #410.16; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
We present Far UV data of close, massive binary stars observed by FUSE. The target sample includes detached and semi-detached systems that are at pre and post Roche lobe overflow evolutionary stages. The binaries are generally double-line spectroscopic binaries, many are eclipsing systems, with well-determined orbits and periods in the range 1.6 - 12 days. The far-UV spectra are being used to determine stellar wind mass loss rates and terminal velocities from species tracing a range of wind ionization states. The spectral features are being modelled to study photospheric abundances and evidence for CNO enhancements as the result of mass transfer. We searched for spectroscopic evidence of mass transfer and wind-wind collision effects. Some of the systems are observed more than once to sample different orbital phases and spectral variability. The ISM properties of the sight lines are also being analyzed.
Iping Rosina
Sonneborn George
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