Dynamics of The Tranquil Cosmic Web

TL;DR

This paper reviews how galaxy surveys and peculiar velocity data inform our understanding of cosmic structure formation, emphasizing the Zel'dovich approximation's role in analyzing dynamics and deviations from standard gravity.

Contribution

It provides an overview of recent methodological advances and results in studying the cosmic web's dynamics using observational data and the Zel'dovich approximation.

Findings

Insights into structure formation processes

Detection of deviations from standard gravity

Advancements in data analysis methods

Abstract

The phase space distribution of matter out to $\sim 100 \rm Mpc$ is probed by two types of observational data: galaxy redshift surveys and peculiar motions of galaxies. Important information on the process of structure formation and deviations from standard gravity have been extracted from the accumulating data. The remarkably simple Zel'dovich approximation is the basis for much of our insight into the dynamics of structure formation and the development of data analyses methods. Progress in the methodology and some recent results is reviewed.