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A precise extragalactic test of General Relativity
Science ( IF 56.9 ) Pub Date : 2018-06-21 , DOI: 10.1126/science.aao2469
Thomas E. Collett 1 , Lindsay J. Oldham 2 , Russell J. Smith 3 , Matthew W. Auger 2 , Kyle B. Westfall 1, 4 , David Bacon 1 , Robert C. Nichol 1 , Karen L. Masters 1, 5 , Kazuya Koyama 1 , Remco van den Bosch 6
Affiliation  

Testing General Relativity on galaxy scales Einstein's theory of gravity, General Relativity (GR), has been tested precisely within the Solar System. However, it has been difficult to test GR on the scale of an individual galaxy. Collett et al. exploited a nearby gravitational lens system, in which light from a distant galaxy (the source) is bent by a foreground galaxy (the lens). Mass distribution in the lens was compared with the curvature of space-time around the lens, independently determined from the distorted image of the source. The result supports GR and eliminates some alternative theories of gravity. Science, this issue p. 1342 A nearby gravitational lens is used to test General Relativity, favoring Einstein’s theory over some alternative models. Einstein’s theory of gravity, General Relativity, has been precisely tested on Solar System scales, but the long-range nature of gravity is still poorly constrained. The nearby strong gravitational lens ESO 325-G004 provides a laboratory to probe the weak-field regime of gravity and measure the spatial curvature generated per unit mass, γ. By reconstructing the observed light profile of the lensed arcs and the observed spatially resolved stellar kinematics with a single self-consistent model, we conclude that γ = 0.97 ± 0.09 at 68% confidence. Our result is consistent with the prediction of 1 from General Relativity and provides a strong extragalactic constraint on the weak-field metric of gravity.

中文翻译:

广义相对论的精确河外测试

在星系尺度上测试广义相对论 爱因斯坦的引力理论广义相对论 (GR) 已在太阳系内进行了精确测试。然而,很难在单个星系的尺度上测试 GR。科莱特等人。利用附近的引力透镜系统,其中来自遥远星系(源)的光被前景星系(透镜)弯曲。透镜中的质量分布与透镜周围的时空曲率进行了比较,独立地根据源的失真图像确定。结果支持 GR 并消除了一些替代的引力理论。科学,这个问题 p。1342 附近的引力透镜被用来测试广义相对论,支持爱因斯坦的理论而不是一些替代模型。爱因斯坦的引力理论,广义相对论,已经在太阳系尺度上进行了精确测试,但引力的长程性质仍然缺乏约束。附近的强引力透镜 ESO 325-G004 提供了一个实验室来探测引力的弱场区域并测量每单位质量产生的空间曲率,γ。通过使用单个自洽模型重建观察到的透镜弧光轮廓和观察到的空间分辨恒星运动学,我们得出结论,γ = 0.97 ± 0.09,置信度为 68%。我们的结果与广义相对论中 1 的预测一致,并为引力的弱场度量提供了强大的河外约束。附近的强引力透镜 ESO 325-G004 提供了一个实验室来探测引力的弱场区域并测量每单位质量产生的空间曲率,γ。通过使用单个自洽模型重建观察到的透镜弧光轮廓和观察到的空间分辨恒星运动学,我们得出结论,γ = 0.97 ± 0.09,置信度为 68%。我们的结果与广义相对论中 1 的预测一致,并为引力的弱场度量提供了强大的河外约束。附近的强引力透镜 ESO 325-G004 提供了一个实验室来探测引力的弱场区域并测量每单位质量产生的空间曲率,γ。通过使用单个自洽模型重建观察到的透镜弧光轮廓和观察到的空间分辨恒星运动学,我们得出结论,γ = 0.97 ± 0.09,置信度为 68%。我们的结果与广义相对论中 1 的预测一致,并为引力的弱场度量提供了强大的河外约束。
更新日期:2018-06-21
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