CAOSP abstracts, Volume: 55, No.: 3, year: 2025

Author(s): Gallenne, A.
Journal: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 55, no. 3, p. 37-46.
Date: 04/2025
Title: Accurate determination of binary star masses and distances using optical long-baseline interferometry
Keyword(s): binaries: general, Stars: fundamental parameters, Stars: variables: Cepheids, Instrumentation: high angular resolution
Pages: 37 -- 46
DOI: https://doi.org/10.31577/caosp.2025.55.3.37
NASA ADS Abstract Service: 2025CoSka..55c..37G
Citation:
License: This work is licensed under a Creative Commons Attribution 4.0 International License

Abstract: One of the most fundamental stellar parameters, mass, is often unavailable or measured with low accuracy, leading to weak constraints on stellar structure and evolution. Observing binary stars through a combination of interferometry and spectroscopy provides a unique opportunity to obtain highly precise dynamical mass measurements. Additionally, double-lined spectroscopic binaries offer independent distance measurements with extreme accuracy, enabling direct tests of Gaia parallaxes. I will demonstrate that by combining interferometric and spectroscopic observations, masses and distances with accuracy levels as high as 0.05% can be achieved for various types of binary systems, including binary Cepheids, eclipsing binaries, and standard binaries.