联合估计月球亚表层与银河前沿特性：基于LuSEE-Night
天体物理仪器与方法
2026-04-29 v1 宇宙学与河外天体物理
摘要
月球表面电磁实验 (Lunar Surface Electromagnetics Experiment, LuSEE-Night) 是一项由NASA、DOE和ESA合作的低频无线电望远镜，将于2027年抵达月球远侧。未知的月球亚表层介电特性是精密仪器校准最显著的限制因素，因为来自月球亚表层的反射会使主波束改变10-20%。这些效应的仿真已提供了洞察并引发了关切，显示以损耗性介电质建模的月球亚表层可吸收大量天空信号能量。虽然这种吸收在以天空噪声为主的信号干荷率 regime 中可能不会产生强烈影响，但它可能使波束图样更加复杂化，使信号更难建模和解释。我们对LuSEE-Night波束的远场特性进行了仿真，考虑了月球亚表层的各种介电特性。我们发现，月球亚表层特性的变化在天线共振处影响最显著，影响其�幅、位置和宽度。相比之下，改变前沿特性在整个频段内都有影响。我们采用贝叶斯推断管道联合估计银河前沿模型和月球亚表层介电特性，并发现银河和亚表层特性的参数都可以联合估计。虽然建模较为理想化，但我们认为由于可行亚表层和银河模型的光谱变化具有非常不同的光谱特征，结果具有较好的鲁棒性。
引用
@article{arxiv.2604.21170,
title = {Joint Estimation of Properties of the Lunar Subsurface and Galactic Foregrounds with LuSEE-Night},
author = {Fatima Yousuf and Zack Li and Stuart D. Bale and David W. Barker and Jack Burns and Christian H. Bye and Hugo Camacho and Cristina-Maria Cordun and Johnny Dorigo Jones and Adam Fahs and Sonia Ghosh and Keith Goetz and Robert Grimm and Sven Herrmann and Joshua J. Hibbard and Oliver Jeong and Marc Klein-Wolt and Léon V. E. Koopmans and Joel Krajewski and Corentin Louis and Milan Maksimović and Ryan McLean and Raul A. Monsalve and Arnur Nigmetov and Paul O'Connor and Aaron Parsons and Michel Piat and Marc Pulupa and Rugved Pund and David Rapetti and Kaja M. Rotermund and Benjamin Saliwanchik and Anže Slosar and Graham Speedie and Nikolai Stefanov and David Sundkvist and Aritoki Suzuki and Harish K. Vedantham and Philippe Zarka},
journal= {arXiv preprint arXiv:2604.21170},
year = {2026}
}
备注
15 pages, 11 figures