Weak gravitational lensing

@article{Bartelmann2017WeakGL,
  title={Weak gravitational lensing},
  author={Matthias Bartelmann and Matteo Maturi},
  journal={Scholarpedia},
  year={2017},
  volume={12},
  pages={32440}
}
Abstract We review theory and applications of weak gravitational lensing. After summarising Friedmann–Lemaitre cosmological models, we present the formalism of gravitational lensing and light propagation in arbitrary space–times. We discuss how weak-lensing effects can be measured. The formalism is then applied to reconstructions of galaxy-cluster mass distributions, gravitational lensing by large-scale matter distributions, QSO–galaxy correlations induced by weak lensing, lensing of galaxies… 

Figures from this paper

Cluster–galaxy weak lensing

Weak gravitational lensing of background galaxies provides a direct probe of the projected matter distribution in and around galaxy clusters. Here, we present a self-contained pedagogical review of

Instrumental systematics and weak gravitational lensing

We present a pedagogical review of the weak gravitational lensing measurement process and its connection to major scientific questions such as dark matter and dark energy. Then we describe common

Probabilistic Cosmological Mass Mapping from Weak Lensing Shear

We infer gravitational lensing shear and convergence fields from galaxy ellipticity catalogs under a spatial process prior for the lensing potential. We demonstrate the performance of our algorithm

Cosmic convergence and shear with extended sources

The standard theory of weak gravitational lensing relies on the approximation that light beams are infinitesimal. Our recent work showed that the finite size of sources, and the associated light

Full-sky weak lensing: a nonlinear post-Friedmann treatment

We present a full-sky derivation of weak lensing observables in the Post-Friedmann (PF) formalism. Weak lensing has the characteristic of mixing small scales and large scales since it is affected by

RCSLenS: testing gravitational physics through the cross-correlation of weak lensing and large-scale structure

The unknown nature of ‘dark energy’ motivates continued cosmological tests of large-scale gravitational physics. We present a new consistency check based on the relative amplitude of non-relativistic

Gravitational lensing in the strong field limit by modified gravity

An investigation of the strong gravitational lensing in specific model of modified gravity is presented. It is shown that a slight modification to the general relativistic metric near the

Probing the theory of gravity with gravitational lensing of gravitational waves and galaxy surveys

The cross-correlation of gravitational wave strain with upcoming galaxy surveys probes theories of gravity in a new way. This method enables testing the theory of gravity by combining the effects

Weak lensing in the Horizon-AGN simulation lightcone

Context. Accurate model predictions including the physics of baryons are required to make the most of the upcoming large cosmological surveys devoted to gravitational lensing. The advent of

Primordial gravitational waves from galaxy intrinsic alignments

Galaxy shapes have been observed to align with external tidal fields generated by the large-scale structures of the Universe. While the main source for these tidal fields is provided by
...

References

SHOWING 1-10 OF 627 REFERENCES

Weak Gravitational Lensing and Its Cosmological Applications

Weak gravitational lensing is a unique probe of the dark side of the universe: It provides a direct way to map the distribution of dark matter around galaxies and clusters of galaxies as well as on

Weak gravitational lensing of the CMB

Strong Lensing by Galaxies

Strong lensing is a powerful tool to address three major astrophysical issues: understanding the spatial distribution of mass at kiloparsec and subkiloparsec scale, where baryons and dark matter

Mapping the dark matter with weak gravitational lensing

We consider the problem of reconstructing the projected mass distribution in clusters from coherent distortions of background galaxies. The ellipticity of a background galaxy provides an estimate of

Current status of weak gravitational lensing

Probing the Universe with Weak Lensing

▪ Abstract Gravitational lenses can provide crucial information on the geometry of the Universe, on the cosmological scenario of formation of its structures as well as on the history of its

Weak gravitational lensing by voids

We consider the prospects for detecting weak gravitational lensing by underdensities (voids) in the large-scale matter distribution. We derive the basic expressions for magnification and distortion

Weak gravitational lensing of distant galaxies

We analyze the two-point statistics of the gravitationally induced ellipticities of distant images whick provide a direct probe of the mass fluctuation spectrum P(k). The analysis extends previous

Gravitational lensing by smooth inhomogeneities in the Universe

The formalism developed by Gunn J. E. (1967, Astrophys. J., 150) on the gravitational lensing effect of smooth inhomogeneities in the Universe is reviewed and some new simple analytical expressions

Gravitational lensing in a universe model with realistic mass distribution

The light propagation in an inhomogeneous univers is studied, using Monte Carlo methods. The model of matter distribution includes galaxies of different masses and radii and position correlations.
...