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Spectroscopic Binary Candidates for Interferometers

Published online by Cambridge University Press:  12 July 2007

Francis C. Fekel  and
Jocelyn Tomkin
Francis C. Fekel
Affiliation:
Center of Excellence in Information Systems, Tennessee State University, Nashville, TN 37209, USA email: [email protected]
Jocelyn Tomkin
Affiliation:
Department of Astronomy, University of Texas, Austin, TX 78712, USA email: [email protected]
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Abstract

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We present a progress report on a program to improve the orbits of known spectroscopic binaries that are potential targets for ground-based optical interferometers, such as the CHARA array and PTI. The combination of such observations results in three-dimensional orbits that produce very accurate masses (uncertainties of less than 0.5%) as well as orbital parallaxes that are generally more precise than those from Hipparcos. After additional analyses determine other basic parameters of the stars, the components can be compared with theoretical evolutionary tracks. We are currently using three observatories to obtain high-resolution, red-wavelength spectra of 44 systems. Results from four years of observation are highlighted. Interferometric observations of some systems are in progress.

Keywords

binaries: spectroscopicstars: fundamental parameters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S240: Binary Stars as Critical Tools & Tests in Contemporary Astrophysics , August 2006 , pp. 59 - 61
Copyright
Copyright © International Astronomical Union 2007

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