来自引力宇宙的信息
(原标题: A Message from the Gravitational Universe)
2023-06-29
浏览次数: 12
北美纳赫兹引力波天文台（nanogrv）用非常大的射电望远镜监测了68颗脉冲星，通过仔细测量脉冲到达时间的细微变化，发现了引力波（GW）背景的证据。这些变化在不同脉冲星之间相互关联，表明它们是由GWs引起的。这个GW背景可能是由数十万甚至数百万个超大质量黑洞双星造成的。欧洲、亚洲和澳大利亚的研究小组今天也分别报告了他们的研究结果。此前，LIGO和室女座探测器已经探测到由单个大质量轨道物体（如恒星质量黑洞）合并产生的更高频率的gw。这张特色的插图通过描绘两个轨道上的超大质量黑洞和几个脉冲星来突出这一时空震动的结果，这些脉冲星似乎有轻微的时间变化。这些gw对时空本身的影响用一个扭曲的网格来表示。开放科学：浏览天体物理学源代码库中的3000多个代码
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Monitoring 68 pulsars with very large radio telescopes, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) has uncovered evidence for the gravitational wave (GW) background by carefully measuring slight shifts in the arrival times of pulses. These shifts are correlated between different pulsars in a way that indicates that they are caused by GWs. This GW background is likely due to hundreds of thousands or even millions of supermassive black hole binaries. Teams in Europe, Asia and Australia have also independently reported their results today. Previously, the LIGO and Virgo detectors have detected higher-frequency GWs from the merging of individual pairs of massive orbiting objects, such as stellar-mass black holes. The featured illustration highlights this spacetime-shaking result by depicting two orbiting supermassive black holes and several of the pulsars that would appear to have slight timing shifts. The imprint these GWs make on spacetime itself is illustrated by a distorted grid. Open Science: Browse 3,000+ codes in the Astrophysics Source Code Library