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

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