论文标题
带有Chara阵列的光谱二进制的视觉轨道。 iv。 HD 61859，HD 89822，HD 109510和HD 191692
Visual Orbits of Spectroscopic Binaries with the CHARA Array. IV. HD 61859, HD 89822, HD 109510, and HD 191692
论文作者
论文摘要
我们使用长期基线干涉测量法与Chara Array一起使用了四个光谱二进制恒星，HD 61859，HD 89822，HD 109510和HD 191692的视觉轨道。我们还使用APO 3.5 m，CTIO 1.5 m和Fairborn天文台2.0 m望远镜从梯形光谱中获得了新的径向速度。通过将天文学和光谱观测结合在一起，我们求解了完整的三维轨道，并确定恒星质量为1-12％的不确定性和距离为0.4-6％的不确定性。然后，我们通过多普勒断层扫描和光谱能量分布分析来估计每个组件星的有效温度和半径。我们发现质量为1.4-3.5 MSUN，半径为1.5-4.7 RSUN，温度为6400-10300K。然后，我们将观察到的恒星参数与恒星演化模型的预测进行比较，但发现我们的系统中只有一个与进化模型非常吻合。
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 Msun, radii of 1.5-4.7 Rsun, and temperatures of 6400-10300K. 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.
