用于CHARA阵列的天文光子H波段消光光束组合器的模拟与开发
Simulation and development of astrophotonic H-band nulling beam combiner for the CHARA Array
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中文总结 AI 辅助
本文针对CHARA阵列开发带主动相位控制的H波段天文光子消光光束组合器，利用专用模拟器CHARM开展模拟，验证其具备探测表征多种明亮恒星伴星系统的潜力。
中文摘要 AI 辅助
消光干涉测量是用于直接探测和表征系外行星等昏暗恒星伴星以及昏暗双星源的一种极具前景的方法。仪器性能的主要限制因素是振动、热膨胀及其他系统源产生的不稳定噪声。光子仪器的 footprint（占地面积）仅几厘米，可实现先进的光控制架构。天文光子实现方案可包含通过马赫-曾德尔干涉仪（MZIs）进行的主动相位控制，以主动最小化光束组合位置处的残余光程误差。光子芯片的紧凑尺寸也使其成为天基应用的有前景解决方案，例如即将推出的宜居世界天文台。高角分辨率天文中心（CHARA）阵列拥有近红外领域世界最长基线，达330米，因此具备近红外领域最灵敏的角分辨率。CHARA上的消光器将可触及系外行星发现与表征所需的新型参数空间。为CHARA开发消光光束组合器的第一步是制定有吸引力、现实且定义明确的科学案例。模拟套件可量化在各自复杂系统中实现此类科学目标的技术要求。CHARA阵列响应模型（CHARM）是首个专为CHARA构建的模拟器，为仪器模拟开辟了新途径。CHARM是一款灵活的模拟工具，用于模拟适用于CHARA阵列的H波段、自校准天文光子消光光束组合器，该组合器带有主动相位控制。本文介绍了我们为CHARA开发光子消光光束组合器的最新进展，包含来自CHARM的早期结果，表明该光子消光器具备探测和表征多种明亮恒星伴星系统的潜力。
英文摘要
Nulling interferometry is a promising method for direct detection and characterization of faint stellar companions such as exoplanets and faint binary sources. The dominant constraint on instrument performance is instability noise from vibrations, thermal expansions, and other systematic sources. Photonic instruments have footprints of a few centimeters and enable advanced light control architectures. Astrophotonic implementations can include active phase control via Mach-Zehnder interferometers (MZIs) to actively minimize residual optical path errors at the location of beam combination. The compact size of photonic chips also makes them a promising solution for space-based applications such as the upcoming Habitable Worlds Observatory. The Center for High Angular Resolution Astronomy (CHARA) Array is equipped with the world's longest baseline in the near-infrared at 330 meters long. CHARA therefore has the most sensitive angular resolution in the near-infrared. A nuller at CHARA would have access to a novel parameter space essential for exoplanet discovery and characterization. The first step in preparing a nulling beam combiner for CHARA is to develop compelling, realistic, and well-defined science cases. Simulation suites quantify the technical requirements to reach such science goals in their respective complex systems. The CHARA Array Response Model (CHARM) is the first-ever simulator built specifically for CHARA, opening up new pathways for instrument simulation. CHARM is a flexible simulation tool of an H-band, self-calibrated astrophotonic nulling beam combiner with active phase control for the CHARA Array. In this paper, we present an update on the development of our photonic nulling beam combiner for CHARA. We include early results from CHARM, demonstrating that the photonic nuller has the potential to detect and characterize a wide range of bright stellar companion systems.
发表机构
- University of California, Los Angeles（加州大学洛杉矶分校）
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