LILA-Pioneer 和 LILA-Horizon 的选址限制与选项
Site selection for the Laser Interferometer Lunar Antenna (LILA)
AI总结:
LILA项目利用月球独特的地震静默环境探测低频引力波,通过LILA-Pioneer和LILA-Horizon两种方案实现科学目标,选址需考虑噪声隔离、环境防护和地形可进入性。
摘要:
月球为探测天体引力波提供了独特优势,特别是在低频范围内。LILA项目计划在月球表面进行引力波测量,利用月球的地震静默性访问低频范围。考虑了两种任务概念:初始的LILA-Pioneer L形应变计和更先进的LILA-Horizon三角干涉仪。由于探测频率极低,LILA仅需利用月球绕地球和太阳的进动进行三角定位(不同于地球基座探测器)。因此,LILA的科学回报与选址无关;然而,实际考虑施加了显著限制。这些包括需隔离人为噪声、保护月球环境、确保月球车可进入性和视距。为LILA-Pioneer和LILA-Horizon展示了候选站点,证明了两种工具部署的许多选项。
英文摘要:
The Earth's Moon presents a uniquely advantageous environment for detecting astrophysical gravitational waves (GWs), particularly in the decihertz regime. The Laser Interferometer Lunar Antenna (LILA) project plans to perform GW measurements on the lunar surface, using the Moon's seismic quietness to access this band. Two mission concepts are considered: the proof-of-concept 1 km initial LILA (iLILA) and the full LILA Observatory, whose equilateral arms are at least 40 km long. The Moon's changing orientation and orbital motion provide the time-dependent source modulation needed for sky localization, so the detector response does not impose a unique lunar region. Practical considerations, most critically line of sight (LOS), nevertheless constrain deployment. A coarse-to-fine search of existing lunar datasets identifies and ranks candidate grid locations. Of 4,050 global grid seeds, 434 iLILA seeds and 71 Observatory circumcenters pass both search stages. These results demonstrate that sites suitable for GW detection naturally exist in large numbers on the lunar surface.
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