Radial Velocity Studies of Close Binary Stars.VII. Methods and Uncertainties

Details Radial Velocity Studies of Close Binary Stars.VII. Methods and Uncertainties Radial Velocity Studies of Close Binary Stars.VII. Methods and Uncertainties

2002-01-14

arxiv.org/abs/astro-ph/0201214v2

Astronomy and Astrophysics

Astrophysics

AASTeX5, 5 figures, extensively modified after the AJ review

Scientific paper

10.1086/342342

Methods used in the radial-velocity program of short-period binary systems at the David Dunlap Observatory are described with particular stress on the Broadening Function (BF) formalism. This formalism has permitted determination of radial velocities from complex spectra of multiple-component systems with component stars showing very different degree of rotational line broadening. The statistics of random errors of orbital parameters is discussed on the basis of the available orbital solutions presented in the six previous papers of the series, each with ten orbits. The difficult matter of systematic uncertainties in orbital parameters is illustrated for one typical case of GM Dra from the most recent Paper VI.

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