加拿大氢强度映射实验（CHIME）射电望远镜首次独立检测到来自90亿年前的宇宙中性氢无线电信号1。这一发现验证了氢强度映射技术的可行性，为研究暗能量开辟了新的途径。
该信号源自宇宙仅有50亿岁的时代1，反映了当时极为微弱的氢气无线电辐射。由于宇宙中约2%的氢处于中性原子形式1，通过测量这些中性氢的分布，CHIME望远镜可以追踪物质在宇宙中的分布状况，进而测量宇宙随时间推移的膨胀速率1。这为深入理解暗能量的性质提供了更快速、低成本的新方法1。
本次研究基于2019年收集的94夜观测数据1。CHIME项目迄今已积累近7年的观测数据可供后续分析1，研究人员的目标是将观测范围进一步延伸至宇宙仅有30亿岁的时代1。相关论文已发表于《天体物理学报》2026年第1009卷第2期1，该项目获得了加拿大创新基金会、加拿大国家研究委员会等机构的资助1。
Canada's CHIME radio telescope has achieved an independent detection of an extremely faint hydrogen radio signal originating from approximately 9 billion years ago, when the universe was only 5 billion years old.1 This breakthrough demonstrates the feasibility of hydrogen intensity mapping as a technique for studying the cosmos.1
By measuring the distribution of hydrogen across the universe, the telescope can track how matter is distributed and measure how the universe has expanded over time, providing a faster and more cost-effective new approach to investigating dark energy.1 The research, based on 94 nights of observational data collected in 2019, marks a significant advance in observational cosmology.1 With nearly seven years of accumulated observational data now available for analysis, CHIME researchers aim to extend their observations back to an era when the universe was only 3 billion years old.1 The findings have been published in The Astrophysical Journal, volume 1009, issue 2, in 2026.1
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