Visual Orbits of Spectroscopic Binaries with the CHARA Array. II. The Eclipsing Binary HD 185912

We present the visual orbit of the double-lined eclipsing binary, HD 185912, from long baseline interferometry with the CHARA Array. We also obtain echelle spectra from the Apache Point observatory to update the spectroscopic orbital solution and analyze new photometry from Burggraaff et al. to mode...

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Bibliographic Details
Published in:The Astronomical journal 2019-12, Vol.158 (6), p.218
Main Authors: Lester, Kathryn V., Gies, Douglas R., Schaefer, Gail H., Farrington, Christopher D., Guo, Zhao, Matson, Rachel A., Monnier, John D., Brummelaar, Theo ten, Sturmann, Judit, Vargas, Norman, Weiss, Samuel A.
Format: Article
Language:English
Subjects:
Arrays
Astronomical models
Astronomy
Binary stars
Eclipses
Eclipsing binary stars
Fundamental parameters of stars
Interferometric binary stars
Interferometry
Parallax
Spectroscopic binary stars
Stellar evolution
Stellar models
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Summary:We present the visual orbit of the double-lined eclipsing binary, HD 185912, from long baseline interferometry with the CHARA Array. We also obtain echelle spectra from the Apache Point observatory to update the spectroscopic orbital solution and analyze new photometry from Burggraaff et al. to model the eclipses. By combining the spectroscopic and visual orbital solutions, we find component masses of M1 = 1.361 0.004 M and M2 = 1.331 0.004 M , and a distance of d = 40.75 0.30 pc from orbital parallax. From the light-curve solution, we find component radii of R1 = 1.348 0.016 R and R2 = 1.322 0.016 R . By comparing these observed parameters to stellar evolution models, we find that HD 185912 is a young system near the zero age main sequence with an estimated age of 500 Myr.
ISSN:0004-6256
1538-3881
DOI:10.3847/1538-3881/ab449d