AI 中文总结
该研究将非冗余孔径掩模与LBTI的ALES积分场摄谱仪结合，在L波段实现光谱色散非冗余孔径掩蔽干涉测量，可用于搜寻恒星伴星及延展源孔径合成。
AI 中文摘要
非冗余孔径掩蔽干涉测量通过光瞳平面掩模将望远镜转化为干涉阵列，从而最大化望远镜的角分辨率。若探测器上的干涉图样经过光谱色散处理，可获得天体场景更深的对比度并提升其空间傅里叶模式的覆盖范围。我们将非冗余孔径掩模与大双筒望远镜干涉仪（LBTI）上LMIRcam的积分场摄谱仪ALES相结合，采用该装置在L波段（约3-4μm）记录了光谱色散非冗余孔径掩蔽观测数据。我们呈现的调试数据可恢复已知双星，并在角距离≥80毫角秒（mas）处，对额外点源分量推导得到约5×10^-3的对比度探测极限。这是首次在L波段将积分场摄谱仪与非冗余孔径掩模结合的尝试，该技术在热红外波段的应用使LBTI能高效巡天附近亮恒星以搜寻暗弱伴星，对研究热外黄道尘及未来类地行星成像任务（如NASA的宜居世界天文台）的目标筛选具有重要意义，另一应用是对延展源（如活动星系核或演化恒星）进行孔径合成。
英文摘要
Non-redundant aperture-masking interferometry maximizes the angular resolution of a telescope by turning it into an interferometric array using pupil plane masks. If the interference pattern on the detector is spectrally dispersed, deeper contrasts of the astrophysical scenery and an improved coverage of its spatial Fourier modes is achieved. We combined a non-redundant aperture mask with the integral field spectrograph ALES of LMIRcam at the Large Binocular Telescope Interferometer (LBTI). With this setup, we recorded spectrally dispersed non-redundant aperture-masking observations in the $L$ band ($\sim$3-4$\,μ$m). We present commissioning data with which we recovered a known binary star and derived contrast detection limits for further point-source components of ${\sim} 5 \times 10^{-3}$ for separations of ${\gtrsim} 80\,$mas. This is the first time that an integral field spectrograph was combined with a non-redundant aperture mask in the $L$ band. Opening up the thermal infrared for this technique, this new capability enables the LBTI to efficiently survey nearby, bright stars for faint companions, which is of great importance for studies on hot exozodiacal dust and target vetting for future exo-Earth imaging missions such as NASA's Habitable Worlds Observatory. A further application is aperture synthesis of extended sources such as active galactic nuclei or evolved stars.
CommentsTo appear in SPIE Conference Proceedings, Astronomical Telescopes and Instrumentation 2026, Optical and Infrared Interferometry and Imaging X, 21 pages, 6 figures
