The Born and lens–lens corrections to weak gravitational lensing angular power spectra
The Born and lens–lens corrections to weak gravitational lensing angular power spectra
复制标题
对弱引力透镜角功率谱的玻恩校正和透镜-透镜校正
DOI：
10.1088/1475-7516/2006/03/007
复制
发表时间：
2006
影响因子：
6.4
通讯作者：
A. Cooray
中科院分区：
文献类型：
--
作者：
C. Shapiro;A. Cooray
We revisit the estimation of higher order corrections to the angular power spectra of weak gravitational lensing. Extending a previous calculation of Cooray and Hu, we find two additional terms to the fourth order in potential perturbations of large-scale structure corresponding to corrections associated with the Born approximation and the neglect of line-of-sight coupling of two foreground lenses in the standard first order result. These terms alter the convergence (κκ), the lensing shear E-mode (ϵϵ), and their cross-correlation (κϵ) power spectra on large angular scales, but leave the power spectra of the lensing shear B-mode (ββ) and rotational (ωω) component unchanged as compared to previous estimates. The new terms complete the calculation of corrections to weak lensing angular power spectra associated with both the Born approximation and the lens–lens coupling to an order in which the contributions are most significant. Taking these features together, we find that these corrections are unimportant for any weak lensing survey, including for a full sky survey limited by cosmic variance.
