论文标题
fermat电位的等效性和镜头潜在方法计算集成的sachs-wolfe效应
Equivalence of the Fermat potential and the lensing potential approaches to computing the integrated Sachs-Wolfe effect
论文作者
论文摘要
我们详细说明，最近得出的用于评估宇宙微波背景（CMB）集成的Sachs-Wolfe（ISW）温度转移的表达，这是由单个嵌入式透镜（补偿）镜头引起的，等于平面背景宇宙学的常规方法。常规方法需要评估镜头电位的时间导数的积分，而新的FERMAT潜在方法更简单，仅需要衍生衍生物的时间延迟的潜在部分。
We show in detail that the recently derived expression for evaluating the integrated Sachs-Wolfe (ISW) temperature shift in the cosmic microwave background (CMB) caused by individual embedded (compensated) lenses is equivalent to the conventional approach for flat background cosmologies. The conventional approach requires evaluating an integral of the time derivative of the lensing potential, whereas the new Fermat potential approach is simpler and only requires taking a derivative of the potential part of the time delay.
