General relativistic corrections to the weak lensing convergence power spectrum
General relativistic corrections to the weak lensing convergence power spectrum
复制标题
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
影响因子:
5
通讯作者:
A. Zentner
中科院分区:
文献类型:
--
作者:
J. Giblin;J. Mertens;G. Starkman;A. Zentner
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 $\ell ~ 20-30$.