西蒙斯天文台：利用扩展的小孔径望远镜阵列对原初引力波的预测约束
宇宙学与河外天体物理
2025-12-19 v1 高能物理 - 实验
高能物理 - 理论
摘要
我们展示了西蒙斯天文台（SO）即将进行的度级（93 GHz 处半高全宽 0.5 度）深场巡天科学性能的最新预测。到 2027 年，SO 的小孔径望远镜（SAT）数量将从三台翻倍至六台，包括将 93 GHz 和 145 GHz 通道的探测器总数翻倍至 48,160 个。结合将巡天持续时间延长至 2035 年的计划，此次扩展将显著增强 SO 对宇宙微波背景偏振中 B 模式信号的搜寻能力，该信号可能是极早期宇宙产生的引力波的潜在特征。假设一个拐点多极矩 的 噪声模型和一个中等复杂的银河系前景模型，我们预测在不存在原初 B 模式的情况下，对张标比 的 （即 68% 置信水平）约束为 。此预测假设利用 SO 大孔径望远镜（LAT）的高分辨率观测和重叠的大尺度结构巡天，最终可以去除 70% 的 B 模式透镜信号。对于更乐观的前景和噪声假设，并假设相同的去透镜水平，此预测约束将提升至 。这些预测代表了 SO 约束能力的重大提升，比原计划（假设现有三台 SAT 进行五年巡天）所能达到的水平提高了约 2.5 倍。
引用
@article{arxiv.2512.15833,
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journal= {arXiv preprint arXiv:2512.15833},
year = {2025}
}
备注
15 pages (excluding front matter), 4 figures, for submission to JCAP