论文标题
用双源镜头测试宇宙学
Testing Cosmology with Double Source Lensing
论文作者
论文摘要
双源镜头提供了距离比的无尺度比率，距离比率是宇宙学的“远程观看”，相对于引力镜头，距离距离比观察者之外的距离。我们使用它来测试宇宙学框架，尤其是在空间曲率和距离二元性关系方面。我们得出了一个恒定空间曲率的一致性方程，不仅允许对扁平与曲线进行研究，而且还允许Friedmann-Lema-Robertson-Robertson-Walker框架本身的研究。对于距离二元性，我们证明了镜头质谱坡度的演变必须控制到$ \ gtrsim5 $ $倍的分数精度，而不是声称的距离二元违规行为。使用euclid和LSST调查中双源镜头系统的镜头预测，我们还探讨了对状态参数的暗能量方程以及镜头质谱斜率的任何演变的约束。
Double source lensing provides a dimensionless ratio of distance ratios, a "remote viewing" of cosmology through distances relative to the gravitational lens, beyond the observer. We use this to test the cosmological framework, particularly with respect to spatial curvature and the distance duality relation. We derive a consistency equation for constant spatial curvature, allowing not only the investigation of flat vs curved but of the Friedmann-Lemaître-Robertson-Walker framework itself. For distance duality, we demonstrate that the evolution of the lens mass profile slope must be controlled to $\gtrsim5$ times tighter fractional precision than a claimed distance duality violation. Using LENSPOP forecasts of double source lensing systems in Euclid and LSST surveys we also explore constraints on dark energy equation of state parameters and any evolution of the lens mass profile slope.
