高角分辨率天文中心望远镜阵（CHARA Array）双视场干涉测量的在天演示

本文介绍了在高角分辨率天文中心望远镜阵（CHARA Array）上实现的双视场干涉测量技术，该技术利用参考星进行实时条纹跟踪以观测较暗的离轴科学目标。研究团队通过对阿（α）双鱼座的观测验证了该模式，并展示了其在相位跟踪和灵敏度方面的潜力。

arXiv:2608.17204v1 Announce Type: new Abstract: Dual-field interferometry uses a bright reference star for real-time fringe tracking, allowing a second beam combiner to record long coherent integrations on a fainter off-axis science target. At the Center for High Angular Resolution Astronomy (CHARA) Array, we implement this mode using the six-telescope MIRC-X and MYSTIC beam combiners in the H and K bands, respectively. We first demonstrated this capability in summer 2025 on the hierarchical triple $\alpha$~Piscium. MIRC-X tracked component A in the $H$ band, while MYSTIC observed component B in the K band, resolving the 7~mas Ba--Bb subsystem and measuring the relative astrometry of the 1.85~arcsec A--B pair with an uncertainty of 234~$\mu$as. Here, we describe subsequent phase-tracking testing, preliminary sensitivity simulations, and planned instrumental upgrades aimed at extending this mode to faint off-axis science targets.