Visual Orbits of Spectroscopic Binaries with the CHARA Array. IV. HD 61859, HD 89822, HD 109510, and HD 191692 - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles The Astronomical Journal Year : 2022

Visual Orbits of Spectroscopic Binaries with the CHARA Array. IV. HD 61859, HD 89822, HD 109510, and HD 191692

Kathryn V. Lester
  • Function : Author
Gail H. Schaefer
  • Function : Author
Francis C. Fekel
  • Function : Author
Douglas R. Gies
  • Function : Author
Todd J. Henry
  • Function : Author
Wei-Chun Jao
  • Function : Author
Leonardo A. Paredes
  • Function : Author
Hodari-Sadiki Hubbard-James
  • Function : Author
Christopher D. Farrington
  • Function : Author
Kathryn D. Gordon
  • Function : Author
S. Drew Chojnowski
  • Function : Author
John D. Monnier
  • Function : Author
Stefan Kraus
  • Function : Author
Narsireddy Anugu
  • Function : Author
Theo ten Brummelaar
  • Function : Author
Claire L. Davies
  • Function : Author
Tyler Gardner
  • Function : Author
Aaron Labdon
  • Function : Author
Cyprien Lanthermann
  • Function : Author
Benjamin R. Setterholm
  • Function : Author

Abstract

We present the visual orbits of four spectroscopic binary stars, HD 61859, HD 89822, HD 109510, and HD 191692, using long baseline interferometry with the CHARA Array. We also obtained new radial velocities from echelle spectra using the APO 3.5 m, CTIO 1.5 m, and Fairborn Observatory 2.0 m telescopes. By combining the astrometric and spectroscopic observations, we solve for the full, three-dimensional orbits and determine the stellar masses to 1%-12% uncertainty and distances to 0.4%-6% uncertainty. We then estimate the effective temperature and radius of each component star through Doppler tomography and spectral energy distribution analyses. We found masses of 1.4-3.5 M , radii of 1.5-4.7 R , and temperatures of 6400-10,300 K. We then compare the observed stellar parameters to the predictions of the stellar evolution models, but found that only one of our systems fits well with the evolutionary models.
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Dates and versions

insu-03860253 , version 1 (18-11-2022)

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Attribution - CC BY 4.0

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Kathryn V. Lester, Gail H. Schaefer, Francis C. Fekel, Douglas R. Gies, Todd J. Henry, et al.. Visual Orbits of Spectroscopic Binaries with the CHARA Array. IV. HD 61859, HD 89822, HD 109510, and HD 191692. The Astronomical Journal, 2022, 164, ⟨10.3847/1538-3881/ac9385⟩. ⟨insu-03860253⟩
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