General relativistic corrections to the weak lensing convergence power spectrum

General relativistic corrections to the weak lensing convergence power spectrum
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弱透镜会聚功率谱的广义相对论修正

DOI:
10.1103/physrevd.96.103530
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发表时间:
2017
期刊:
影响因子:
5
通讯作者:
A. Zentner
A. Zentner
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
J. Giblin;J. Mertens;G. Starkman;A. Zentner

文献摘要

被引文献

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我们计算弱透镜收敛功率谱,$C^{\kappa\kappa}(\theta)$,在一个充满灰尘的宇宙使用完全非线性广义相对论模拟。然后,频谱进行比较,以更标准的,近似计算通过计算的Barthel(牛顿)的潜力,在线性化的重力和利用玻恩近似。我们发现修正的角度功率谱振幅的百分之十,在非常大的角度尺度,$\ell ~ 2-3$,并在中间的角度尺度的$\ell ~ 20-30$的水平修正。
We compute the weak lensing convergence power spectrum, $C^{\kappa\kappa}(\theta)$, in a dust-filled universe using fully non-linear general relativistic simulations. The spectrum is then compared to more standard, approximate calculations by computing the Bardeen (Newtonian) potentials in linearized gravity and utilizing the Born approximation. We find corrections to the angular power spectrum amplitude of order ten percent at very large angular scales, $\ell ~ 2-3$, and percent-level corrections at intermediate angular scales of $\ell ~ 20-30$.