AI 中文总结
EON-SII是一款双望远镜可移动皮秒恒星强度干涉仪，针对致密星天体物理设计，可将SII技术扩展至V星等8.5-10.7的目标，具备高集光与分光性能，弥补现有设备的观测局限。
AI 中文摘要
恒星强度干涉测量法（SII）通过观测明亮天体源的望远镜记录光子到达波动的相关性，其可分辨比单个光学望远镜小得多的角尺度，且对大气湍流不敏感。1956年该方法首次在天狼星上演示后，Hanbury Brown和Twiss用它测量了32颗恒星的直径。近年VERITAS、MAGIC、H.E.S.S.及CTAO的LST-1已复兴该技术，但因这些设备的光学设计针对伽马射线天体物理学而非SII，观测仍限于明亮目标。本文提出EON-SII，这是一种双望远镜强度干涉仪的设计与性能，旨在将SII技术扩展至V星等约8.5至10.7的致密目标。每台可移动望远镜配有4米直径镜面、约9平方米的集光面积、主动对准的18块主镜，以及卡塞格林光学系统，可将至少90%的光集中在3角秒内。无光纤光谱仪覆盖400-550纳米波段，分辨率R约7000-8000，设计提供约1000个统计独立的光谱通道。
英文摘要
Stellar intensity interferometry (SII) measures correlations in photon-arrival fluctuations recorded by telescopes observing bright celestial sources. It can resolve angular scales far smaller than those accessible to a single optical telescope and is largely insensitive to atmospheric turbulence. After the first demonstration of SII on Sirius in 1956, Hanbury Brown and Twiss used the technique to measure the diameters of 32 stars. More recently, VERITAS, MAGIC, H.E.S.S., and CTAO's LST-1 have revived the method, although observations remain restricted to bright targets because of their optical design, optimized for gamma-ray astrophysics, rather than SII. We present EON-SII, the design and performance of a two-telescope intensity interferometer intended to extend the SII technique to compact targets at magnitudes of about V=8.5 up to V=10.7. Each transportable telescope has a 4-m diameter mirror, approximately 9m2 collecting area, an actively aligned 18-panel primary mirror, and Cassegrain optics specified to concentrate at least 90% of the light within 3 arcsec. A fibre-free spectrograph covers 400-550 nm at R~7000-8000 and is designed to provide of order 1000 statistically independent spectral channels.
Comments11 pages, 13 figures, to be published in Monthly Notices of the Royal Astronomical Society
