Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aj....109..345o&link_type=abstract
The Astronomical Journal (ISSN 0004-6256), vol. 109, no. 1669, p. 345-349
Astronomy and Astrophysics
Astronomy
4
Astronomical Photometry, Mass Ratios, Mass Transfer, Spectroscopic Analysis, Stellar Color, Stellar Rotation, Accretion Disks, Astronomical Spectroscopy, Ultraviolet Radiation
Scientific paper
Using the Wilson program, new system parameters for the long-period mass-transferring binary RS Cephei are derived from new spectroscopic observations and a new solution of Olson's photometric data. Color-dependent uncertaintities in the photometric mass ratio are discussed. I through v observations made from 1980 to 1985 are essentially free of circumsteller contamination, but a simultaneous Iybvu solution reveals about 0.6 mag of excess ultraviolet radiation in primary eclipse totality, probably from uneclipsed continuous emission from an accretion disk around the hotter star. The ultraviolet disk luminosity will help to constrain estimates of the physical properties of the disk, to be found later.
Etzel Paul B.
Olson Edward C.
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