A number of challenges to the standard Λ CDM model have been emerging during the past
few years as the accuracy of cosmological observations improves. In this review we discuss …

We review the formalism and applications of non-linear perturbation theory (PT) to
understanding the large-scale structure of the Universe. We first discuss the dynamics of …

▪ Abstract Weak gravitational lensing provides a unique method to map directly the
distribution of dark matter in the universe and to measure cosmological parameters. This …

The alignments between galaxies, their underlying matter structures, and the cosmic web
constitute vital ingredients for a comprehensive understanding of gravity, the nature of …

A cross-correlation technique of lensing tomography is developed to probe dark energy in
the Universe. The variation of weak shear with redshift around foreground galaxies depends …

We report the detection of a significant (5.5 sigma) excess of correlations between galaxy
ellipticities at scales ranging from 0.5 to 3.5 arc-minutes. This detection of a gravitational …

This book aims at giving the basis of primordial cosmology. The book is self-contained in the
sense that all the elements for the derivations of the presented results are given. It can be …

We measure the anisotropy of dark matter flows on small scales (∼ 500 kpc) in the near
environment of haloes using a large set of simulations. We rely on two different approaches …

Weak gravitational lensing is now established as a powerful method to measure mass
fluctuations in the universe. It relies on the measurement of small coherent distortions of the …

Galaxy shapes are not randomly oriented, rather they are statistically aligned in a way that
can depend on formation environment, history and galaxy type. Studying the alignment of …