Statistical Analysis of Dark Matter Halos in the Non-Linear Regime and Peaks of the Density Field in the Initial Conditions of the Cosmic Web

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Amiri, Mohammad Hossein | 2024

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 57474 (04)
University: Sharif University of Technology
Department: Physics
Advisor(s): Baghram, Shant
Abstract:
When we talk about the large-scale structure of the cosmos and the cosmic web, one of the important issues is to examine the location of the structures formed. We use statistical characteristics to check the cosmic web. Nearest neighbor distribution, two-point correlation, count in cell, etc. are some of the parameters that help us in this way. Our main problem in this project is to examine these statistical parameters in large scale structure for two different time periods. First, in the time period near the present age(z ≈ 0), we want to check these parameters for the dark matter halos that have formed the structure, and secondly, for the initial conditions and transition to high redshifts, where the universe is in a linear regime. If we base the scale of the investigation on the expansion of the universe to see only the effect of gravity on the formation of structures, it is expected that the information of these two time periods are related and we can also predict the formed structures by examining the density peaks
Keywords:
Large Scale Structure ; Cosmic Web ; Dark Matter Halo ; Density Peaks ; Nearest Neighbor