Astrometric mass ratios for three spectroscopic binaries
J. Sahlmann, F. C. Fekel
TL;DR
This paper combines astrometric data from Hipparcos with spectroscopic orbits to precisely determine the mass ratios and secondary masses of three binary star systems, advancing stellar mass measurements.
Contribution
It provides the first full astrometric solutions for three spectroscopic binaries, enabling model-independent mass ratio estimates.
Findings
Astrometric orbits of three binaries are fully determined.
Precise mass ratio estimates are obtained for these systems.
Follow-up infrared spectroscopy could yield dynamical masses.
Abstract
The orbits of five single-lined spectroscopic binaries have recently been determined. We now use astrometric measurements that were collected with the Hipparcos satellite to constrain the systems' mass ratios and secondary masses. The barycentric astrometric orbits of three binary systems, HD 140667, HD 158222, and HD 217924, are fully determined and precise estimates of their mass ratios are obtained. Follow-up of these systems with infrared spectroscopy could yield model-independent dynamical masses for all components.
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