Light propagation in linearly perturbed ΛLTB models
Light propagation in linearly perturbed ΛLTB models
复制标题
线性扰动 LTB 模型中的光传播
DOI:
10.1088/1475-7516/2017/11/037
复制
发表时间:
2017
影响因子:
6.4
通讯作者:
Matthias Bartelmann
中科院分区:
文献类型:
--
作者:
Sven Meyer;Matthias Bartelmann
We apply a generic formalism of light propagation to linearly perturbed spherically symmetric dust models including a cosmological constant. For a comoving observer on the central worldline, we derive the equation of geodesic deviation and perform a suitable spherical harmonic decomposition. This allows to map the abstract gauge-invariant perturbation variables to well-known quantities from weak gravitational lensing like convergence or cosmic shear. The resulting set of differential equations can effectively be solved by a Green's function approach leading to line-of-sight integrals sourced by the perturbation variables on the backward lightcone. The resulting spherical harmonic coefficients of the lensing observables are presented and the shear field is decomposed into its E-and B-modes. Results of this work are an essential tool to add information from linear structure formation to the analysis of spherically symmetric dust models with the purpose of testing the Copernican Principle with multiple cosmological probes.
登录
查看更多内容
DOI:
10.1111/j.1365-2966.2012.21750.x
发表时间:
2011-09
影响因子:
4.8
作者:
C. Clarkson;G. Ellis;A. Faltenbacher;R. Maartens;Obinna Umeh;J. Uzan
通讯作者:
C. Clarkson;G. Ellis;A. Faltenbacher;R. Maartens;Obinna Umeh;J. Uzan
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
C. Clarkson
通讯作者:
C. Clarkson
影响因子:
6.4
作者:
P. Fleury;F. Nugier;G. Fanizza
通讯作者:
P. Fleury;F. Nugier;G. Fanizza
影响因子:
5
作者:
F. Bernardeau;C. Bonvin;F. Vernizzi
通讯作者:
F. Vernizzi
影响因子:
1.3
作者:
T. Dray
通讯作者:
T. Dray